@article {20397, title = {Incongruence of morphological determinations and DNA barcode sequences: a case study in Cinnamomum (Lauraceae)}, journal = {Willdenowia}, volume = {49}, year = {2019}, pages = {383-400}, chapter = {383}, abstract = {

In the course of molecular systematic studies of Lauraceae we received a sample of a plant cultivated under the name Cinnamomum porrectum in the Botanical Garden M\ünchen-Nymphenburg. Preliminary determinations, both morphologically based on the Flora of China (Li \& al. 2008) and by chloroplast sequences (psbA-trnH spacer, trnK intron including matK gene, trnL intron, trnL-trnF spacer and trnQ-rps16 spacer) obtained by Sanger sequencing suggested that it was C. camphora, still the plant looked different from other individuals of C. camphora cultivated in the botanical gardens of Berlin, Hamburg, Mainz, Munich and Oldenburg. Attempts to sequence the more informative nuclear internal transcribed spacer repeatedly led to mixed signals. We therefore used Illumina sequencing on a set of pre-amplified molecular markers (ITS, trnK 3\′ and 5\′ intron, trnL intron, and the intergenic spacers psbA-trnH, trnL-trnF, as well as parts of the trnQ-rps16 spacer), and downloaded available sequences of C. camphora and C. parthenoxylon from GenBank for comparison. Considerable differences were found among these sequences, but the haplotype groups do not coincide with the current species determinations. Particularly the internal transcribed spacer sequences are rather diverse, suggesting possible misidentifications, contaminations, and/or a common gene pool that is larger than anticipated. Concerning the plant in question, our results suggest that it may be a hybrid, with C. camphora as the maternal and another species, possibly C. parthenoxylon, as the paternal parent.

}, keywords = {Cinnamomum, interspecific hybridization, ITS, Lauraceae, matK, NGS, psbA-trnH spacer, trnK intron, trnL intron, trnL-trnF spacer, trnQ-rps16 spacer}, doi = {10.3372/wi.49.49309}, author = {Rohwer, Jens G. and Trofimov, Dimitrij and Mayland-Quellhorst, Eike and Albach, Dirk} } @article {20376, title = {Towards a phylogenetic classification of the Ocotea complex (Lauraceae): an analysis with emphasis on the Old World taxa and description of the new genus Kuloa}, journal = {Botanical Journal of the Linnean Society}, volume = {boz088}, year = {2020}, month = {01/2020}, pages = {1-26}, chapter = {1}, abstract = {

Ocotea is one of the largest genera in the Lauraceae (c. 400 spp.), and it has been known to be paraphyletic with respect to most other genera of the New World Lauraceae for almost 20 years. In the traditional circumscription, Ocotea contains not only Neotropical species, but also about 45 species from the African region, including Macaronesia, Madagascar, and the Comoro and Mascarene Islands. Only a few of the species have been included in previous molecular systematic analyses. Here we present a phylogenetic analysis, based on ITS and psbA-trnH sequences of 168 Lauraceae species, including 151 taxa from the Ocotea complex, among them 26 of the 45 Palaeotropical species currently placed in Ocotea. Our results show that the Old World species belong to two well-supported and morphologically distinguishable clades, one of which is placed unresolved among the Neotropical clades of the Ocotea complex, whereas the other is sister to Cinnamomum section Cinnamomum. The two clades can also be differentiated based morphologically. As a step towards a phylogenetic classification, we recognize the second group as the new genus Kuloa.

}, keywords = {internal transcribed spacer, morphological analysis, phylogenetic analysis, psbA-trnH, stomatal complex}, doi = {10.1093/botlinnean/boz088}, author = {Trofimov, Dimitrij and Rohwer, Jens G.} } @article {20373, title = {Towards a phylogenetic classification of the Ocotea complex (Lauraceae): classification principles and reinstatement of Mespilodaphne}, journal = {Botanical Journal of the Linnean Society}, volume = {190}, year = {2019}, month = {04/2019}, pages = {25-50}, chapter = {25}, abstract = {

The large genus Ocotea (c. 400 species) has been known to be paraphyletic with respect to most other Neotropical genera of Lauraceae for almost 20 years, but a phylogenetic classification has not yet been proposed. Here we present a phylogenetic analysis, based on ITS and psbA-trnH sequences of 123 species from the Ocotea complex, focused on the Neotropical species with bisexual flowers. Our results show that several well-supported clades can be recognized morphologically. We discuss the principles of splitting monophyletic genera from large paraphyletic groups, and we reinstate the genus Mespilodaphne as a first step towards a phylogenetic classification. In addition, three species previously included in Aiouea are transferred to Damburneya.

}, keywords = {classification principles, fruit morphology, internal transcribed spacer, paraphyletic groups, phylogenetic analysis, psbA-trnH, stamen morphology}, doi = {10.1093/botlinnean/boz010}, author = {Trofimov, Dimitrij and Pedro L.R. de Moraes and Rohwer, Jens G.} } @article {20369, title = {Epidermal features allowing identification of evolutionary lineages in the Ocotea complex (Lauraceae)}, journal = {Perspectives in Plant Ecology, Evolution and Systematics}, volume = {31}, year = {2018}, month = {01/2018}, pages = {17-35}, chapter = {17}, abstract = {

Epidermal characters are widely used in identification of fossil plant material, yet they are insufficiently known in many extant taxa. Here, we examined the cuticle and stomatal complex in 85 species of the Ocotea complex by optical and scanning electron microscopy. We defined 19 types of stomatal surface appearance, which were mostly consistent with genera or species groups recognized based on reproductive characteristics. The epidermal features support the conclusion derived from DNA analyses that Ocotea is heterogeneous in its current circumscription. We suggest an evolution of the subsidiary cells in the Ocotea complex species from asymmetric to symmetric, and from relatively wide to narrower shapes of the stomatal complex.

}, keywords = {cuticle, evolution, stomata}, doi = {https://doi.org/10.1016/j.ppees.2017.12.003}, author = {Trofimov, Dimitrij and Rohwer, Jens G.} } @article {20363, title = {Neither Phoebe nor Cinnamomum {\textendash} the tetrasporangiate species of Aiouea (Lauraceae)}, journal = {Taxon}, volume = {66}, year = {2017}, month = {10/2017}, pages = {1085-1111}, chapter = {1085}, abstract = {

Cinnamomum is among the largest genera of the Lauraceae, including species from tropical to temperate Asia and from tropical to subtropical America. However, previous studies indicated that Cinnamomum might not be monophyletic in its current circumscription. We therefore re-investigated the genus and possible relatives with an increased taxon sample, particularly of the Neotropical species. Our results, based on sequences of the nuclear ITS region and the chloroplast spacers psbA-trnH and trnG-trnS, show that the Neotropical Cinnamomum species indeed do not form a monophyletic group with the Paleotropical species. Instead, the American species form a clade in which most species of the Neotropical genus Aiouea are nested within several subclades. According to the ITS data the Aiouea/Cinnamomum clade is sister to the likewise predominantly Neotropical Ocotea complex, rather than the two Paleotropical Cinnamomum clades. Therefore, Cinnamomum cannot be upheld in its current circumscription. As the type C. verum, is from Asia, the Neotropical species need to be placed in a different genus. We decided to transfer them to Aiouea here, because this is the oldest generic name in the Aiouea/Cinnamomum clade, and the only character separating Aiouea from Neotropical Cinnamomum is the number of pollen sacs per anther (di- vs. tetrasporangiate),
a feature that is known to be variable within several other genera as well. This transfer requires 42 new combinations and two nomina nova. In addition, six species described in the unpublished Ph.D. thesis of one of the authors (FLH) are validated in Aiouea here, and the only species of the genus Mocinnodaphne is transferred to Aiouea as well.

}, doi = {10.12705/665.6}, author = {Rohde, Randi and Rudolph, Barbara and Ruthe, Kristina and Lorea-Hern{\'a}ndez, Francisco G. and Pedro L.R. de Moraes and Li, Jie and Rohwer, Jens G.} } @article {20362, title = {Alseodaphnopsis: A new genus of Lauraceae based on molecular and morphological evidence}, journal = {PLoS ONE}, volume = {12}, year = {2017}, month = {10/2017}, pages = {e0186545}, chapter = {e0186545}, abstract = {

An investigation of a questionable species of the genus Alseodaphne led to the discovery of a new genus Alseodaphnopsis H. W. Li \& J. Li, gen. nov., separated from Alseodaphne Nees, and a new species Alseodaphnopsis ximengensis H. W. Li \& J. Li, sp. nov., endemic to Yunnan province, China. This new species is characterized by having big, axillary, paniculate inflorescences, as well as large, subglobose fruits. Based on DNA sequence data from two gene regions (nuclear ribosomal ITS and LEAFY intron II), we investigate its phylogenetic position within the Persea group. Phylogenies using maximum parsimony (MP) and Bayesian inference (BI) support the recognition of Alseodaphnopsis as a distinct genus but do not resolve well its relationship within the Persea group. The new genus is circumscribed, eight new combinations for its species are made, and a description and illustration of the new species are provided.

}, doi = {10.1371/journal.pone.0186545}, author = {Mo, Yue-qing and Li, Lang and Li, Jian-wu and Rohwer, Jens G. and Li, Hsi-Wen and Li, Jie} } @article {20361, title = {Floral structure and ontogeny of Syndiclis (Lauraceae)}, journal = {PLoS ONE}, volume = {12}, year = {2017}, month = {10/2017}, pages = {e0186358}, abstract = {

Generic delimitation in the Beilschmiedia group of the Lauraceae remains ambiguous because flowering specimens of a few genera with confined distribution are poorly represented in herbaria, and a few floral characters important for taxonomy are still poorly known. Syndiclis is sporadically distributed in southwestern China, and is represented in the herbaria by only a few flowering specimens. We conducted field investigations to collect floral materials of four species and observed structures and ontogeny of the tiny flowers using both light microscopy (LM) and scanning electron microscopy (SEM). The results show that the genus Syndiclis possesses flowers with huge variation in both merosity and organ number. Flowers of the genus are dimerous, trimerous, or tetramerous, or have mixed merosity with monomerous and dimerous, or dimerous and trimerous, or trimerous and tetramerous whorls. The number of staminodes ranges from two to eight, depending on floral merosity, and on how many stamens of the third androecial whorl are reduced to staminodes. The staminodes of the fourth androecial whorl are comparable to the staminodes in Potameia, but the staminodes of the third androecial whorl of Syndiclis are relatively larger than the staminodes in Potameia. They are erect or curved inwards, covering the ovary. The anthers are usually two-locular, but rarely one-locular or three-locular. Each stamen of the third androecial whorl bears two conspicuous and enlarged glands at the base. The lability of floral merosity and organ number of Syndiclis may have been caused by changes of pollination system and loss of special selective pressures that are present in most Lauraceous plants with fixed floral organ number. This study furthers our understanding of variation and evolution of a few important characters of the Beilschmiedia group and provides essential data for a revised generic classification of the group.

}, doi = {10.1371/journal. pone.0186358}, author = {Zeng, Gang and Liu, Bing and David K. Ferguson and Rohwer, Jens G. and Yang, Yong} } @article {20360, title = {A contribution to the pollen morphology of the Cryptocarya group (Lauraceae)}, journal = {Grana}, year = {2017}, abstract = {

In this study, pollen grains of 74 taxa (84 specimens) of the Cryptocarya group, including 22 type collections, have been examined by scanning electron microscopy. Pollen grains of Aspidostemon, Endiandra, Hexapora, Potameia and Triadodaphne are described here for the first time. For the other genera (Beilschmiedia, Cryptocarya, Eusideroxylon, Potoxylon) the results of previous studies are largely confirmed, but a novel type of exine covered by clavate-baculate structures was found in a few Cryptocarya species (C. gracilis and C. macrodesme from New Caledonia, C. saligna from South America). A larger diversity of spinule morphology and density than hitherto known is documented among the African species of Beilschmiedia.

}, keywords = {Aspidostemon, Beilschmiedia, Endiandra, Eusideroxylon, Hexapora, inaperturate, Potameia, Potoxylon}, doi = {10.1080/00173134.2017.1365374}, author = {Rohwer, Jens G.} } @article {20346, title = {Phylogenetic study of the genus Nectandra (Lauraceae), and reinstatement of Damburneya}, journal = {Taxon}, volume = {65}, year = {2016}, month = {10/2016}, pages = {980-996}, chapter = {980}, abstract = {

Earlier studies indicated that the genus Nectandra, currently the second-largest genus of the Neotropical Lauraceae, might be diphyletic in its traditional circumscription, but the evidence was not quite conclusive. Our phylogenetic analyses based on nuclear (ITS) and chloroplast (psbA-trnH) sequences of 45 Nectandra species as well as 42 representatives of 18 genera of the core Lauraceae (Ocotea complex, Laureae, Aiouea, Asian Cinnamomum and Persea groups) confirm the suspicion that Nectandra is diphyletic. The two groups, Nectandra s.str. and the N. coriacea group, are each well supported in the maximum parsimony and Bayesian analyses, but they are not sister to each other. Nectandra s.str. is sister to Pleurothyrium, and the clade including Nectandra s.str. and Pleurothyrium is very likely closer to the dioecious taxa of the Ocotea complex. The N. coriacea group, on the other hand, appears to be closer to bisexual taxa known as the Ocotea helicterifolia group. In addition, Nectandra s.str. is characterized by a large deletion in the psbA-trnH spacer compared to all other core Lauraceae, including its sister group Pleurothyrium. Considering these facts, Nectandra cannot be maintained in the traditional sense. We therefore transfer the species of the N. coriacea group to the oldest generic name applied to this group, Damburneya . On the basis of fossil records from the American subcontinents and in accordance with previous phylogenetic and molecular clock studies we suggest a scenario of a climate-driven migration from North to South America, with a subsequent rapid radiation of Nectandra s.str. in South America.

}, author = {Trofimov, Dimitrij and Rudolph, Barbara and Rohwer, Jens G.} } @article {20332, title = {Characterization of Hawaiian Cryptocarya (Lauraceae): recognition of a critically endangered species and relation to non-Hawaiian congeners}, journal = {Pacific Science}, volume = {69}, year = {2015}, pages = {103-115}, chapter = {103}, abstract = {

Abstract: Proper taxonomic classification of species is essential to the conservation of rare species to ensure that they garner needed protection. This study was undertaken to determine relationships among the Hawaiian representatives of Cryptocarya. This genus is represented in Hawai\‘i on the islands of Kaua\‘i and O\‘ahu, where it is currently classified as a single species (C. mannii) and not considered endangered. It had previously been recognized as two species, C. mannii on Kaua\‘i where it is relatively abundant and C. oahuensis on O\‘ahu. O\‘ahu plants have been in decline since their discovery over 100 yr ago and now only one naturally occurring plant is known. RAPD analysis demonstrates that populations on Kaua\‘i are genetically distinct from those on O\‘ahu. Sequence analysis of nuclear ( ITS) and plastid (trnK intron) gene regions shows distinctions among plants from different islands ( ITS: four or five base substitutions plus one repeat length difference; trnK intron: one base substitution plus one repeat length difference). Differentiation identified here is comparable with that of some congeneric species elsewhere and is consistent with recognition of C. oahuensis and C. mannii as separate species. Both species are members of the Asian-Australian clade in a broader phylogenetic analysis. Morphological traits that distinguish each species are examined, and a key to the species is provided. Conservation measures to protect the critically endangered C. oahuensis are discussed.

}, doi = {10.2984/69.1.8}, author = {Morden, Clifford W and Ching Harbin, Susan and Rohwer, Jens G. and Portner, Talia and Yorkston, Mitsuko} } @article {20320, title = {Origins and evolution of cinnamon and camphor: A phylogenetic and historical biogeographical analysis of the Cinnamomum group (Lauraceae)}, journal = {Molecular Phylogenetics and Evolution}, volume = {96}, year = {2016}, pages = {33-44}, chapter = {33}, abstract = {

Tropical and subtropical amphi-Pacific disjunction is among the most fascinating distribution patterns, but received little attention. Here we use the fossil-rich Cinnamomum group, a primarily tropical and sub-tropical Asian lineage with some species distributed in Neotropics, Australasia and Africa to shed light upon this disjunction pattern. Phylogenetic and biogeographic analyses were carried out using sequences of three nuclear loci from 94 Cinnamomum group and 13 outgroup samples. Results show that although there are three clades within a monophyletic Cinnamomum group, Cinnamomum and previously recognized subdivisions within this genus were all rejected as natural groups. The Cinnamomum group appears to have originated in the widespread boreotropical paleoflora of Laurasia during the early Eocene (ca. 55 Ma). The formation and breakup of the boreotropics seems to have then played a key role in the formation of intercontinental disjunctions within the Cinnamomum group. The first cooling interval (50\–48 Ma) in the late early Eocene resulted in a floristic discontinuity between Eurasia and North America causing the tropical and subtropical amphi-Pacific disjunction. The second cooling interval in the mid-Eocene (42\–38 Ma) resulted in the fragmentation of the boreotropics within Eurasia, leading to an African\–Asian disjunction. Multiple dispersal events from North into South America occurred from the early Eocene to late Miocene and a single migration event from Asia into Australia appears to have occurred in the early Miocene.

}, keywords = {Amphi-Pacific disjunction, Biogeography, Boreotropical paleoflora, Cinnamomum group, Lauraceae, molecular phylogeny}, doi = {http://dx.doi.org/10.1016/j.ympev.2015.12.007}, author = {Huang, Jian-Feng and Li, Lang and van der Werff, Henk and Li, Hsi-Wen and Rohwer, Jens G. and Crayn, Darren M. and Meng, Hong-Hu and van der Merwe, Marlien and Conran, J. G. and Li, Jie} } @inbook {19807, title = {Lauraceae}, booktitle = {Flora de La Rep{\'u}blica de Cuba}, volume = {19 (2)}, year = {2014}, publisher = {Koeltz Scientific Books}, organization = {Koeltz Scientific Books}, address = {K{\"o}nigstein}, issn = {978-3-87429-450-8}, author = {Rohwer, Jens G.} } @article {19803, title = {A phylogenetic analysis of the Cryptocarya group (Lauraceae), and relationships of Dahlgrenodendron, Sinopora, Triadodaphne, and Yasunia}, journal = {Phytotaxa}, volume = {158}, year = {2014}, month = {02/2014}, pages = {111-132}, chapter = {111}, abstract = {

A phylogenetic analysis based on nuclear ITS and plastid trnK intron sequences confirms that Dahlgrenodendron, Sinopora, Triadodaphne, and Yasunia are members of the Cryptocarya group, as expected from morphology.\  Dahlgrenodendron from South Africa is sister to Aspidostemon from Madagascar. Triadodaphne inaequitepala is nested within Endiandra (both from Australasia), and Yasunia from South America is nested among South American Beilschmiedia species. Sinopora is a member of the Beilschmiedia clade, but its precise position is still uncertain.\  Among large genera of the group, Cryptocarya is clearly monophyletic, and Endiandra appears to be as well, if T. inaequitepala is included. Beilschmiedia is paraphyletic with respect to (at least) Potameia and Yasunia. Most well-supported clades within genera are geographically homogeneous, except a clade including the Chilean Cryptocarya alba and two New Caledonian species. Both Beilschmiedia and Cryptocarya have reached the Americas more than once.\  Four-locular anthers are plesiomorphic in the Cryptocarya group; two-locular anthers have arisen by fusion of the two pollen sacs of a theca. In the plesiomorphic fruit type, the ovary is completely enclosed in receptacular tissue; a superior fruit, seated free on its pedicel, is a synapomorphy of the Beilschmiedia clade.

}, keywords = {Biogeography, evolution, floral morphology}, issn = {1179-3163}, doi = {http://dx.doi.org/10.11646/phytotaxa.158.2.1}, author = {Rohwer, Jens G. and Pedro L.R. de Moraes and Rudolph, Barbara and van der Werff, Henk} } @article {19756, title = {Nectandra ovatocaudata, a new species of Lauraceae from Cajamarca, Peru}, journal = {Novon}, volume = {22}, year = {2012}, month = {11/2012}, pages = {220-222}, chapter = {220}, abstract = {

A new species of Nectandra Rol. ex Rottb. (Lauraceae) from Cajamarca, Peru, is described and illustrated. Nectandra ovatocaudata Rohwer appears to be related to N. amazonum Nees, but differs in its leaf shape, in having a receptacle that is densely pubescent inside, and in its habitat.

}, keywords = {IUCN Red List, Lauraceae, Nectandra, Peru}, doi = {http://dx.doi.org/10.3417/2011099}, author = {Rohwer, Jens G.} } @article {19753, title = {Molecular phylogenetic analysis of the Persea group (Lauraceae) and its biogeographic implications on the evolution of tropical and subtropical Amphi-Pacific disjunctions}, journal = {American Journal of Botany}, volume = {98}, year = {2011}, pages = {1520-1536}, chapter = {1520}, keywords = {Alseodaphne, Apollonias, Dehaasia, Machilus, Notaphoebe, Persea, Phoebe, plant taxonomy}, author = {Li, Lang and Li, Jie and Rohwer, Jens G. and van der Werff, Henk and Wang, Z.H. and Li, Hsi-Wen} } @inbook {18384, title = {Lauraceae}, booktitle = {The Families and Genera of Vascular Plants}, volume = {2}, year = {1993}, pages = {366{\textendash}390}, publisher = {Springer}, organization = {Springer}, address = {Berlin, Heidelberg, New York}, author = {Rohwer, Jens G.}, editor = {Kubitzki, Klaus and Rohwer, Jens G. and Bittrich, Volker} } @article {18383, title = {Is Persea (Lauraceae) monophyletic? Evidence from nuclear ribosomal ITS sequences}, journal = {Taxon}, volume = {58}, year = {2009}, pages = {1153-1167}, author = {Rohwer, Jens G. and Li, Jie and Rudolph, Barbara and Schmidt, Sabrina A. and van der Werff, Henk and Li, Hsi-Wen} } @article {18382, title = {The timing of nectar secretion in staminal and staminodial glands in Lauraceae}, journal = {Plant Biology}, volume = {11}, year = {2009}, pages = {490-492}, author = {Rohwer, Jens G.} } @article {18381, title = {Jumping genera: the phylogenetic positions of Cassytha, Hypodaphnis and Neocinnamomum (Lauraceae) based on different analyses of trnK intron sequences}, journal = {Annals of the Missouri Botanical Garden}, volume = {92}, year = {2005}, pages = {153-178}, author = {Rohwer, Jens G. and Rudolph, Barbara} } @article {18380, title = {Toward a Phylogenetic Classification of the Lauraceae: Evidence from matK Sequences}, journal = {Systematic Botany}, volume = {25}, year = {2000}, pages = {60{\textendash}71}, author = {Rohwer, Jens G.} } @inbook {18379, title = {Lauraceae: 10. Nectandra}, booktitle = {Flora of the Venezuelan Guayana}, volume = {5}, year = {1999}, pages = {722{\textendash}725}, publisher = {Missouri Botanical Garden Press}, organization = {Missouri Botanical Garden Press}, address = {St. Louis}, author = {Rohwer, Jens G.}, editor = {Berry, P.E. and Yatskievych, K. and Holst, B.K.} } @article {18378, title = {A note on the evolution of the stamens in the Laurales, with emphasis on the Lauraceae}, journal = {Botanica Acta}, volume = {107}, year = {1994}, pages = {103{\textendash}110}, author = {Rohwer, Jens G.} } @book {18377, title = {Lauraceae: Nectandra}, series = {Flora Neotropica}, volume = {60}, year = {1993}, pages = {332}, author = {Rohwer, Jens G.} } @article {18376, title = {Ecogeographical differentiation in Nectandra (Lauraceae), and its historical implications}, journal = {Botanica Acta}, volume = {106}, year = {1993}, pages = {88{\textendash}89}, author = {Rohwer, Jens G. and Kubitzki, Klaus} } @article {18375, title = {Notes on "Flora Ilustrada Catarinense, Laur{\'a}ceas 6, Nectandra"}, journal = {Sellowia}, volume = {42{\textendash}44}, year = {1992}, pages = {35{\textendash}41}, author = {Rohwer, Jens G.} } @article {18374, title = {Two new genera of Neotropical Lauraceae, and critical remarks on the generic delimitation}, journal = {Annals of the Missouri Botanical Garden}, volume = {78}, year = {1991}, pages = {388{\textendash}400}, url = {http://www.biodiversitylibrary.org/item/89022$\#$page/394/mode/1up}, author = {Rohwer, Jens G. and Richter, H.G. and van der Werff, Henk} } @article {18373, title = {Borderline cases between Ocotea, Nectandra, and Phoebe (Lauraceae): The "marginal" species of the Ocotea helicterifolia-group, including the O.~heydeana-group}, journal = {Botanische Jahrb{\"u}cher f{\"u}r Systematik, Pflanzengeschichte und Pflanzengeographie}, volume = {112}, year = {1991}, pages = {365{\textendash}397}, author = {Rohwer, Jens G.} } @article {18372, title = {Ocotea angustitepala (Krause) Robyns \& Wilczek (Lauraceae) from Cameroon is an introduced Neotropical Nectandra}, journal = {Bulletin du Jardin Botanique National de Belgique}, volume = {59}, year = {1989}, pages = {468{\textendash}470}, author = {Rohwer, Jens G.} } @article {18371, title = {Three new species of Nectandra from the Venezuelan Guayana}, journal = {Annals of the Missouri Botanical Garden}, volume = {75}, year = {1988}, pages = {1525{\textendash}1532}, author = {Rohwer, Jens G.} } @article {18370, title = {The genera Dicypellium, Phyllostemonodaphne, Systemonodaphne, and Urbano-dendron (Lauraceae)}, journal = {Botanische Jahrb{\"u}cher f{\"u}r Systematik, Pflanzengeschichte und Pflanzengeographie}, volume = {110}, year = {1988}, pages = {157{\textendash}171}, author = {Rohwer, Jens G.} } @article {18369, title = {Aspidostemon, a new lauraceous genus from Madagascar}, journal = {Botanische Jahrb{\"u}cher f{\"u}r Systematik, Pflanzengeschichte und Pflanzengeographie}, volume = {109}, year = {1987}, pages = {71{\textendash}79}, author = {Rohwer, Jens G. and Richter, H.G.} } @article {18368, title = {Proposal to conserve 2789 Umbellularia against Sciadiodaphne (Lauraceae)}, journal = {Taxon}, volume = {35}, year = {1986}, pages = {747}, author = {Rohwer, Jens G.} } @article {18367, title = {Some aspects of dioecy in Ocotea (Lauraceae)}, journal = {Plant Systematics and Evolution}, volume = {152}, year = {1986}, pages = {47{\textendash}48}, author = {Rohwer, Jens G.} } @article {18366, title = {Entwicklungslinien im Ocotea-Komplex (Lauraceae)}, journal = {Botanische Jahrb{\"u}cher f{\"u}r Systematik, Pflanzengeschichte und Pflanzengeographie}, volume = {107}, year = {1985}, pages = {129{\textendash}135}, author = {Rohwer, Jens G.} } @article {18365, title = {Prodromus einer Monographie der Gattung Ocotea Aubl. (Lauraceae), sensu lato}, journal = {Mitteilungen aus dem Institut f{\"u}r allgemeine Botanik in Hamburg}, volume = {20}, year = {1986}, month = {04/1986}, pages = {3-278}, author = {Rohwer, Jens G.} }