Botanical drawings remain an indispensable tool in contemporary botanical research and education, significantly supporting both teaching and scientific work. They allow precise documentation and identification of plant species by highlighting specific features that are often not as clearly visible in photographs.
The family Lauraceae, commonly known as the laurel or avocado family, is one of the most frequent and ecologically significant woody plant families in humid tropical and subtropical forests worldwide. However, our knowledge of this group is still incomplete. Its phylogeny is only partially resolved, and we know little about the biology of most species. Many species within the larger genera are almost impossible to identify due to a lack of keys and recent revisions.
The majority of the detailed drawings in this collection were created between 1982 and 1986 by Jens G. Rohwer during his dissertation work, in which he examined numerous specimens from many herbaria around the world and analyzed their structures. Prof. Dr. Jens G. Rohwer held the position of professor of botany (systematics, evolution, and biodiversity of plants) at our university from 2000 until 2024.
Most drawings were made with a camera lucida, on DIN A6 paper (105 x 148 mm).
From this collection a total of 1477 digital objects are displayed in FUNDus
Photo: Jens G. Rohwer
Title: Oreodaphne sellowii Meisn. Accepted name: Ocotea glauca (Nees) Mez Collector: Sello Collection Number: 397 Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: In Serrâ da Piedade Brasiliae merid. (Sellow n. 397 !). (v. s. in hb. Berol.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/50170530 
Photo: Jens G. Rohwer
Title: Oreodaphne semecarpifolia Meisn. Accepted name: Persea sprucei Kosterm. Collector: Spruce Collection Number: 3065 Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Persea Comments: Kostermans (1965) created the nomen novum Persea sprucei for this species because of Persea semecarpifolia Trimen (1885). Earlier (1961) he had placed it in Cinnamomum, but Lorea-Hernández (1996) did not accept it there. It appears to be an "aberrant" species that fits neither Subgenus Persea nor Subgenus Eriodaphne. Imaging technique: Illustration Original type data: In Bras. prov. Rio Negro ad fl. Cassiquiare, etc. (Spruce n. 3065!) (v. s. in h. DC., Hook., etc.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804399 
Photo: Jens G. Rohwer
Title: Oreodaphne semicompleta Nees & Mart. Accepted name: Ocotea semicompleta (Nees & Mart.) Mez Collector: Sello Collection Number: 1379 Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Comments: In Systema Laurinarum (1836), Nees mentioned the type number 1379. Mez (1889) erroneously cited it as "1374" Imaging technique: Illustration Original type data: In Brasilia tropica; Sellow. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804502 
Photo: Jens G. Rohwer
Title: Oreodaphne sieberi Meisn. Accepted name: Ocotea leptobotra (Ruiz & Pav.) Mez Collector: Sieber Collection Number: fl. Martinic. 79 Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: In Martinicâ (Sieber n. 79 !), Dominicâ, Guadalupâ, Mexico (Linden n. 1601 ! 1607 !), Bahiâ (Blanchet n. 1478 !). (v. s. in hb. DC., Mart., Hook., etc.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804859 
Photo: Jens G. Rohwer
Title: Oreodaphne spectabilis Meisn. Accepted name: Ocotea spectabilis (Meisn.) Mez Collector: Pohl Collection Number: 2605 Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Comments: In M there are two specimens labelled "Pohl 2605". One of them is this species, the other Ocotea velloziana (Meisn.) Mez. Imaging technique: Illustration Original type data: In Brasiliae prov. Goyaz et Sebastianopol. (Pohl n. 2172 ! 2605 !). (v. s. in h. Vindob. et Mart.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804176 
Photo: Jens G. Rohwer
Title: Oreodaphne spixiana Nees Accepted name: Ocotea spixiana (Nees) Mez Collector: Martius Collection Number: s.n. Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: In sylvis Capoës dictis locis montanis Serro Frio Provinciae Minarum Generalium Brasiliae, Maio mense in anthesi legit de Martius. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804527 
Photo: Jens G. Rohwer
Title: Oreodaphne splendens Meisn. Accepted name: Ocotea splendens (Meisn.) Baill. Collector: Sagot Collection Number: 978 Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: In Guianâ Gallicâ (Sagot n. 978!). (v. s. in hb. DC.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17805263 
Photo: Jens G. Rohwer
Title: Oreodaphne suaveolens Meisn. Accepted name: Ocotea diospyrifolia (Meisn.) Mez Collector: Gibert Collection Number: 56 Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: In Paraguay et Gran Chaco (Gibert n. 21 ! 56! 74 !). (v. s. in hb. Hook.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17805801 
Photo: Jens G. Rohwer
Title: Oreodaphne sublanuginosa Nees Accepted name: Ocotea ovalifolia (Ruiz & Pav.) Mez Collector: Ruiz Collection Number: s.n. Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: Laurus sublanuginosa Fl. Peruv. ed. Ruiz in Herb. gen. Berol. In Chinchao und anderen Wäldern der Andes von Peru. Ruiz. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804262 
Photo: Jens G. Rohwer
Title: Oreodaphne subtriplinervia Meisn. Accepted name: Ocotea subtriplinervia (Meisn.) Hemsl. Collector: Linden Collection Number: 17 Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Comments: Might be a species of Damburneya. Labels of both syntypes on the same sheet in K. Imaging technique: Illustration Original type data: In Mexico circa Vera Cruz et Jalapa (Linden n. 17! Galeotti n. 7061!). (v.s. in hb. Hook.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804542 
Photo: Jens G. Rohwer
Title: Oreodaphne tampicensis Meisn. Accepted name: Ocotea tampicensis (Meisn.) Hemsl. Collector: Berlandier Collection Number: 132 Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: In Mexico circa Tampico (Berland. n. 132!). (v. s. in hb. DC., Boiss.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804596 
Photo: Jens G. Rohwer
Title: Oreodaphne tarapotana Meisn. Accepted name: Ocotea tarapotana (Meisn.) Mez Collector: Spruce Collection Number: 4226 Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: In Peruviâ orient. circa Tarapoto (Spruce n. 4226 !). (v.s. in hb. Mart.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804266 
Photo: Jens G. Rohwer
Title: Oreodaphne terminalis Nees Accepted name: Ocotea leptobotra (Ruiz & Pav.) Mez Collector: Poeppig Collection Number: 1861 Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: Tocache, Peruviae, cum Evonymodaphne armeniaca, (Poeppig n. 1861.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804259 
Photo: Jens G. Rohwer
Title: Oreodaphne thymelaeoides Nees & Mart. Accepted name: Ocotea lancifolia (Schott) Mez Collector: Sello Collection Number: s.n. Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Ocotea Comments: The lectotype has been annotated by Martius as “Ocotea daphnoides”, by Nees as “Oreodaphne angustifolia thÿmelaeoides N. ab. Es. / nomen mutandum …, ob Oreod. angustifol. Schott. in Spr. Cur. post.,” and by Meissner as “Oreodaphne Martiana Nees β thymelaeoides Meissner ipse”.
Both syntypes are mounted on the same sheet in GZU. The Sello collection is probably no. 1367. Mez (1889) indicated that it was 1567, but that is clearly an error. Imaging technique: Illustration Original type data: In Provincia Minarum Generalium Brasiliae; a Martius. In ripa fluminis, rio dos mortes pequenho dicti; Sellow. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804519 
Photo: Jens G. Rohwer
Title: Oreodaphne tristis Nees & Mart. Accepted name: Ocotea tristis (Nees & Mart.) Mez Collector: Martius Collection Number: s.n. Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: In Provincia Minarum Generalium Var. α. primus legit a Martius. Varr. α, β, γ, diversis Brasiliae locis Sellow. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804784 
Photo: Jens G. Rohwer
Title: Oreodaphne tristis Nees & Mart. Accepted name: Ocotea tristis (Nees & Mart.) Mez Collector: Sello Collection Number: 1365 Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Comments: Sello 1365 is also an isotype of Oreodaphne rigens var. parvifolia Nees. Imaging technique: Illustration Original type data: In Provincia Minarum Generalium Var. α. primus legit a Martius. Varr. α, β, γ, diversis Brasiliae locis Sellow. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804784 
Photo: Jens G. Rohwer
Title: Oreodaphne tristis var. concolor Nees Accepted name: Ocotea tristis (Nees & Mart.) Mez Collector: Sello Collection Number: 706 Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Ocotea Comments: As "γ. Concolor" in original publication. Imaging technique: Illustration Original type data: Varr. α, β, γ, diversis Brasiliae locis Sellow. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804784 
Photo: Jens G. Rohwer
Title: Oreodaphne tweediei Meisn. Accepted name: Nectandra megapotamica (Spreng.) Mez Collector: Tweedie Collection Number: s.n. Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Nectandra Imaging technique: Illustration Original type data: In Brasiliâ merid. (Tweedie !). (v. s. in h. Hook. et Vindob.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/50090550 
Photo: Jens G. Rohwer
Title: Oreodaphne tweediei var. cymulosa Meisn. Accepted name: Nectandra megapotamica (Spreng.) Mez Collector: Widgren Collection Number: 393 Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Nectandra Imaging technique: Illustration Original type data: In prov. Minas Geraës (Widgren n. 393 !). License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/50183070 
Photo: Jens G. Rohwer
Title: Oreodaphne umbrosa Nees Accepted name: Ocotea tabacifolia (Meisn.) Rohwer Collector: Martius Collection Number: 1188 Nomenklaturstatus: not accepted: homonym (illegitimate) Family: Lauraceae Genus: Ocotea Comments: The name Oreodaphne umbrosa was published twice by Nees (Syst Laur. p.388 and p.456). The latter was based on Ocotea umbrosa Kunth, thus the former (this one) is illegitimate. Imaging technique: Illustration Original type data: Inter Taparoca et Tapanhoceganga Provinciae Minarum generalium locis altis sylvaticis, Maio mense cum floribus legit de Martius. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/50243571 
Photo: Jens G. Rohwer
Title: Oreodaphne undulata Meisn. Accepted name: Pleurothyrium undulatum (Meisn.) Rohwer Collector: Riedel Collection Number: 1412 Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Pleurothyrium Imaging technique: Illustration Original type data: In Brasil. bor. prov. Rio Negro (Riedel n. 1412!). (v. s. in hb. Petrop.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804592 
Photo: Jens G. Rohwer
Title: Oreodaphne urophylla Meisn. Accepted name: Ocotea leptobotra (Ruiz & Pav.) Mez Collector: Schomburgk Collection Number: 1087 Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Ocotea Comments: A specimen in K bears both type numbers 712 and 1087. A specimen in P bears the number 713 in addition to 712. Imaging technique: Illustration Original type data: In Guianâ anglicâ (Schomb. n. 712 ! 1087 !). (v. s. in hb. Berol. et Vindob.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804536 
Photo: Jens G. Rohwer
Title: Oreodaphne vaccinioides Meisn. Accepted name: Ocotea vaccinioides (Meisn.) Mez Collector: Gardner Collection Number: 5846 Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: In Serra dos Orgaos, prope Rio Jan. (Gardner n. 5846 !). (v. s. in h. Hook., Vindob.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804599 
Photo: Jens G. Rohwer
Title: Oreodaphne variabilis Nees Accepted name: Ocotea variabilis (Nees) Mez Collector: Martius Collection Number: s.n. Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Comments: Rohwer (1986, Mitt. Inst. Allg. Bot. Hamburg 20: 189) had placed this species in the synonymy of Ocotea lancifolia (Schott) Mez. Moraes (2015, Harvard Pap. Bot. 20: 187), however, noted that the cupules of its fruits were different, cupola-shaped with simple margin instead of almost flat with double margin. Imaging technique: Illustration Original type data: Ocotea variabilis Mart. in Herb. Bras. Monac.
In campestribus altis iugi montium Serro frio Minarum generalium Brasiliae, Maio mense cum floribus legit cl. Martius. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804522 
