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: Persea spec., Valenzuela 9994 Accepted name: Persea Mill. Collector: Valenzuela Collection Number: 9994 Nomenklaturstatus: accepted Family: Lauraceae Genus: Persea Imaging technique: Illustration License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/40005008 
Photo: Jens G. Rohwer
Title: Persea spec., Valenzuela 9994 Accepted name: Persea Mill. Collector: Valenzuela Collection Number: 9994 Nomenklaturstatus: accepted Family: Lauraceae Genus: Persea Imaging technique: Illustration License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/40005008 
Photo: Jens G. Rohwer
Title: Persea spec., van der Werff 13236 Accepted name: Persea Mill. Collector: van der Werff Collection Number: 13236 Nomenklaturstatus: accepted Family: Lauraceae Genus: Persea Imaging technique: Illustration License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/40005008 
Photo: Jens G. Rohwer
Title: Petalanthera bracteolata Nees Accepted name: Ocotea bracteolata (Nees) Mez Collector: Martius Collection Number: s.n. Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: Ocotea bracteolata Mart. in Herb. Bras. Monac. In sylvis primaevis Coari, Provinciae Rio negro Brasiliae Novembre et Decembre, et in Japurensibus eiusdem Provinciae Ianuario et Februario mensibus legit de Martius; ad Jurimaguas et Maynas, Poeppig n. 2426. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804530 
Photo: Jens G. Rohwer
Title: Petalanthera bracteolata Nees Accepted name: Ocotea bracteolata (Nees) Mez Collector: Poeppig Collection Number: 2426 Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: Ocotea bracteolata Mart. in Herb. Bras. Monac. In sylvis primaevis Coari, Provinciae Rio negro Brasiliae Novembre et Decembre, et in Japurensibus eiusdem Provinciae Ianuario et Februario mensibus legit de Martius; ad Jurimaguas et Maynas, Poeppig n. 2426. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17804530 
Photo: Jens G. Rohwer
Title: Phoebe angustata S.F. Blake Accepted name: Ocotea tampicensis (Meisn.) Hemsl. Collector: Palmer Collection Number: 80 Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: Tamaulipas: vicinity of Victoria, 320 m., 1 Feb. – 9 April 1907, Palmer 80 (TYPE in Gray Herb.); limestone hills near Tampico, 1 Mar. 1899, Pringle 8006. San Luis Potosi: near Los Canos, 15–21 Oct. 1902, Palmer 249; limestone hills, Las Palmas, 24 July 1891, Pringle 3794. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17802083 
Photo: Jens G. Rohwer
Title: Phoebe belizensis Lundell Accepted name: Nectandra belizensis (Lundell) C.K. Allen Collector: Gentle Collection Number: 3304 Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Nectandra Imaging technique: Illustration Original type data: British Honduras: Stann Creek District, Stann Creek Valley, Mountain Cow Ridge, in high ridge, March 31, 1940, Percy H. Gentle 3304 (type in the University of Michigan Herbarium), vernacular name, white laurel; Stann Creek Valley, Big Eddy Ridge, May, 1940, Gentle 3346. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17802932 
Photo: Jens G. Rohwer
Title: Phoebe cubensis Nees Accepted name: Aiouea montana (Sw.) R. Rohde Collector: Poeppig Collection Number: s.n. Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Aiouea Imaging technique: Illustration Original type data: Laurus parviflora Poeppig. Herb. Cub. (nec. Sw.) Ocotea Cymbarum Herb. Reg. Berol. (exempl. Poeppigianum, adiecta schedula, Lauri parviflorae nomine a Poeppigio inscripta. Crescit in sylvis densis insulae Cubae, Januario florens (Poeppig). Vidi specc. sicca Cubensia in Herbariis Martiano et Regio Berolinensi. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17800957 
Photo: Jens G. Rohwer
Title: Phoebe insularis Meisn. Accepted name: Ocotea insularis (Meisn.) Mez Collector: Menzier? Collection Number: s.n. Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: In Cocos Island (Ind. or.?).
(v. s. in h. Hook.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17800976 
Photo: Jens G. Rohwer
Title: Phoebe longicaudata Lundell Accepted name: Damburneya longicaudata (Lundell) Trofimov & Rohwer Collector: Lundell Collection Number: 6757 Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Damburneya Imaging technique: Illustration Original type data: Type in the Herbarium of the University of Michigan, C. L. Lundell 6833 (flower), 6757 (fruit), collected in riparian and marginal forest near San Agustin, Mountain Pine Ridge, El Cayo District, British Honduras, August 1936. Additional specimens examined: British Honduras: El Cayo District: Valentin, Lundell 6401; vernacular names "aguacatillo." In jungle beyond Little Mountain Pine Ridge, Bartlett 13098. Belize District: Gracie Rock on the Sibun River, Gentle 1572. Stann Creek District: All Pines, Schipp 571. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17802633 
Photo: Jens G. Rohwer
Title: Phoebe mayana Lundell Accepted name: Ocotea oblonga (Meisn.) Mez Collector: Gentle Collection Number: 3187 Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Ocotea Imaging technique: Illustration Original type data: British Honduras: Stann Creek District, Baboon Ridge, Stann Creek Valley, in high ridge on top of hill, Feb. 2, 1940, Percy H. Gentle 3187 (type in the University of Michigan herbarium), bark whitish, wood white, vernacular name, timber sweet. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17802941 
Photo: Jens G. Rohwer
Title: Phoebe pittieri Mez Accepted name: Ocotea pittieri (Mez) van der Werff Collector: Tonduz Collection Number: 11893 Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Comments: Floral details of holotype. Imaging technique: Illustration Original type data: Costarica: in sylvis ad Copey, alt. 1800 m: leg. Tonduz in herb. inst. phys.-geogr. nat. Costaric. n. 11893 (herb. Berol.). License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17801583 
Photo: Jens G. Rohwer
Title: Phyllostemonodaphne geminiflora (Mez) Kosterm. Accepted name: Phyllostemonodaphne geminiflora (Mez) Kosterm. Collector: Kuhlmann Collection Number: RB889 Nomenklaturstatus: accepted Family: Lauraceae Genus: Phyllostemonodaphne Imaging technique: Illustration License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17802636 
Photo: Jens G. Rohwer
Title: Phyllostemonodaphne geminiflora (Mez) Kosterm. Accepted name: Phyllostemonodaphne geminiflora (Mez) Kosterm. Collector: Mello Filho Collection Number: 532 Nomenklaturstatus: accepted Family: Lauraceae Genus: Phyllostemonodaphne Imaging technique: Illustration License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17802636 
Photo: Jens G. Rohwer
Title: Pleurothyrium bifidum Nees Accepted name: Pleurothyrium bifidum Nees Collector: Poeppig Collection Number: 2398 Nomenklaturstatus: accepted Family: Lauraceae Genus: Pleurothyrium Imaging technique: Illustration Original type data: Ocotea ? bifida Poepp. n. 2398. Ad Yurimaguas, Maynas; Poeppig 1831. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17800940 
Photo: Jens G. Rohwer
Title: Pleurothyrium chrysophyllum Nees Accepted name: Pleurothyrium cuneifolium Nees Collector: Poeppig Collection Number: 1719 Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Pleurothyrium Imaging technique: Illustration Original type data: Ocotea chrysophylla Poepp. n. 1718. In Andibus Peruvianis; Poeppig. Vidi etiam in Herb. Arnottiano specimen peruvianum (n. 1432.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17800941 
Photo: Jens G. Rohwer
Title: Pleurothyrium chrysothyrsus Meissn. Accepted name: Rhodostemonodaphne kunthiana (Nees) Rohwer Collector: Mathews Collection Number: 3031 Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Rhodostemonodaphne Imaging technique: Illustration Original type data: In Peruviâ circa Chachapoyas (Matthews n. 3031 !). (v. s. in hb. Hook.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17800942 
Photo: Jens G. Rohwer
Title: Pleurothyrium cuneifolium Nees Accepted name: Pleurothyrium cuneifolium Nees Collector: Poeppig? Collection Number: s.n. Nomenklaturstatus: accepted Family: Lauraceae Genus: Pleurothyrium Imaging technique: Illustration Original type data: Ad Ega iuxta flumen Amazonum; Poeppig n. 2908. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17800943 
Photo: Jens G. Rohwer
Title: Pleurothyrium ferrugineum Meisn. Accepted name: Ocotea arnottiana (Nees) van der Werff Collector: Mathews Collection Number: 1429 Nomenklaturstatus: not accepted: homotypic (nomenclatural) synonym Family: Lauraceae Genus: Ocotea Comments: The type of this name is an isotype of Nectandra arnottiana Nees. Imaging technique: Illustration Original type data: In Peruviâ circa Jambrasbamba (Matthews n. 1429!). (v. s. in hb. Hook.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17800944 
Photo: Jens G. Rohwer
Title: Pleurothyrium krukovii A.C. Sm. Accepted name: Pleurothyrium poeppigii Nees Collector: Krukoff Collection Number: 5563 Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Pleurothyrium Imaging technique: Illustration Original type data: Type, Krukoff 5563, collected Aug. 17, 1933, on "terra firma" near mouth of Rio Macauhan (tributary of Rio Yaco), basin of Rio Purus, Territory of Acre. Other collections from the same locality are Krukoff 5255 and 5722. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17802362 
Photo: Jens G. Rohwer
Title: Pleurothyrium maximum O.C. Schmidt Accepted name: Pleurothyrium maximum O.C. Schmidt Collector: Tessmann Collection Number: 4040 Nomenklaturstatus: accepted Family: Lauraceae Genus: Pleurothyrium Imaging technique: Illustration Original type data: Ostperu: Oberer Marañon, Mündung des Santiago, flutfreier Hochwald, ca. 160 m ü. d. M.; (blühend 16. September 1924 — G. Tessmann n. 404 (Typus!); desgl., 12. November 1924 — G. Tessmann n. 4529).). License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17802269 
Photo: Jens G. Rohwer
Title: Pleurothyrium nobile A.C. Sm. Accepted name: Pleurothyrium nobile A.C. Sm. Collector: Krukoff Collection Number: 5121 Nomenklaturstatus: accepted Family: Lauraceae Genus: Pleurothyrium Imaging technique: Illustration Original type data: Type, Krukoff 5121, collected July 1, 1933, on "varzea" land near mouth of Rio Embira (tributary of Rio Tarauaca), basin of Rio Jurua, State of Amazonas. Another specimen from the same locality is Krukoff 4800, which is more or less juvenile and bears shorter inflorescences. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17802363 
Photo: Jens G. Rohwer
Title: Pleurothyrium parviflorum Ducke Accepted name: Pleurothyrium parviflorum Ducke Collector: Ducke Collection Number: RB19935 Nomenklaturstatus: accepted Family: Lauraceae Genus: Pleurothyrium Imaging technique: Illustration Original type data: Habitat ad ripas inundatas Igarapédo Lago de Serpa prope Itacoatiara (civitate Amazonas), legit A. Ducke 4-7-913 [sic!], H. J. B. R. n. 19.935. License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17802270 
Photo: Jens G. Rohwer
Title: Pleurothyrium poeppigii Nees Accepted name: Pleurothyrium poeppigii Nees Collector: Poeppig Collection Number: s.n. Nomenklaturstatus: accepted Family: Lauraceae Genus: Pleurothyrium Imaging technique: Illustration Original type data: Ad Maynas invenit cl. Poeppig. (Addenda n. 301.) License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17800946 
