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 anomala Britton & P. Wilson Accepted name: Persea hypoleuca (A. Rich.) Mez Collector: Ekman Collection Number: 14295 Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Persea Imaging technique: Illustration License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17802090 Photo: Jens G. Rohwer
Title: Persea anomala Britton & P. Wilson Accepted name: Persea hypoleuca (A. Rich.) Mez Collector: Logier Collection Number: 19681 Nomenklaturstatus: not accepted: heterotypic (taxonomic) synonym Family: Lauraceae Genus: Persea Imaging technique: Illustration License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17802090 Photo: Jens G. Rohwer
Title: Persea areolatocostae (C.K. Allen) van der Werff Accepted name: Persea areolatocostae (C.K. Allen) van der Werff Collector: Apaza Collection Number: 873 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/17804735 Photo: Jens G. Rohwer
Title: Persea areolatocostae (C.K. Allen) van der Werff Accepted name: Persea areolatocostae (C.K. Allen) van der Werff Collector: Escobar Collection Number: 2330 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/17804735 Photo: Jens G. Rohwer
Title: Persea areolatocostae (C.K. Allen) van der Werff Accepted name: Persea areolatocostae (C.K. Allen) van der Werff Collector: Gentry Collection Number: 44658 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/17804735 Photo: Jens G. Rohwer
Title: Persea areolatocostae (C.K. Allen) van der Werff Accepted name: Persea areolatocostae (C.K. Allen) van der Werff Collector: Homeier Collection Number: 1055 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/17804735 Photo: Jens G. Rohwer
Title: Persea areolatocostae (C.K. Allen) van der Werff Accepted name: Persea areolatocostae (C.K. Allen) van der Werff Collector: Homeier Collection Number: 544 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/17804735 Photo: Jens G. Rohwer
Title: Persea areolatocostae (C.K. Allen) van der Werff Accepted name: Persea areolatocostae (C.K. Allen) van der Werff Collector: Jaramillo Collection Number: 1227 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/17804735 Photo: Jens G. Rohwer
Title: Persea basiobtusa Rohwer Accepted name: Persea basiobtusa Rohwer Collector: Palacios Collection Number: 6740 Nomenklaturstatus: accepted Family: Lauraceae Genus: Persea Comments: Floral details of holotype from HBG. Imaging technique: Illustration Original type data: TYPE: Ecuador, Zamora-Chinchipe: Nangaritza Canton, valle del Río Nangaritza, Miazi, bosque sobre pendientes fuertes de roca caliza o de pizarra, bosque primario, muy denso, arboles cubiertos de musgos, 78°40'W, 04°18'S, 1200 m, 10 Dec. 1990, W. Palacios 6740 (holotype, HBG!; isotypes, MO!, QCNE not seen). License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/100541296 Photo: Jens G. Rohwer
Title: Persea basiobtusa Rohwer Accepted name: Persea basiobtusa Rohwer Collector: Palacios Collection Number: 6740 Nomenklaturstatus: accepted Family: Lauraceae Genus: Persea Comments: Pistil of holotype from HBG. Imaging technique: Illustration Original type data: TYPE: Ecuador, Zamora-Chinchipe: Nangaritza Canton, valle del Río Nangaritza, Miazi, bosque sobre pendientes fuertes de roca caliza o de pizarra, bosque primario, muy denso, arboles cubiertos de musgos, 78°40'W, 04°18'S, 1200 m, 10 Dec. 1990, W. Palacios 6740 (holotype, HBG!; isotypes, MO!, QCNE not seen). License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/100541296 Photo: Jens G. Rohwer
Title: Persea boldufolia Mez Accepted name: Persea boldufolia Mez Collector: van der Werff Collection Number: 14842 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/17801585 Photo: Jens G. Rohwer
Title: Persea boldufolia Mez Accepted name: Persea boldufolia Mez Collector: van der Werff Collection Number: 14842 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/17801585 Photo: Jens G. Rohwer
Title: Persea buchtienii O.C. Schmidt Accepted name: Persea buchtienii O.C. Schmidt Collector: Buchtien Collection Number: 1725 Nomenklaturstatus: accepted Family: Lauraceae Genus: Persea Imaging technique: Illustration Original type data: Bolivia: Hacienda Casana sobre el camino a Tipuani, ca. 1400 m, 23. 10. 1922 — Buchtien n. 7307! n. 7308! Region de Mapiri, San Carlos, ca. 850 m, 2. 12. 1926 — Buchtien n. 1725 im Herb. Günther (Typus!); ibid., fruct., 13. 2. 1927 — Buchtien n. 1687 im herb. Günther! License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/17802313 Photo: Jens G. Rohwer
Title: Persea calva Rohwer & van der Werff Accepted name: Persea calva Rohwer & van der Werff Collector: van der Werff Collection Number: 21874 Nomenklaturstatus: accepted Family: Lauraceae Genus: Persea Comments: Floral details of isotype from HBG. An unusual species, likely to be transferred to a different genus; apparently close to Asian Alseodaphnopsis. Imaging technique: Illustration Original type data: TYPE: Ecuador. Zamora-Chinchipe: Palanda, Reserva Tapichalaca, near rd. betw. Yangana & Valladolid, S of Podocarpus National Park, around lodge at Tapichalaca, in montane forest, upper Río Chinchipe watershed, 04°29'44"S, 79°07'55"W, 2500–2700 m, 31 Oct. 2006, H. van der Werff, B. Gray & W. Quizhpe 21874 (holotype, MO!; isotypes, HBG!, HUT!, LOJA!, QCNE!). License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/100527269 Photo: Jens G. Rohwer
Title: Persea calva Rohwer & van der Werff Accepted name: Persea calva Rohwer & van der Werff Collector: van der Werff Collection Number: 21874 Nomenklaturstatus: accepted Family: Lauraceae Genus: Persea Comments: Floral details of holotype from MO; front side of drawing. An unusual species, likely to be transferred to a different genus; apparently close to Asian Alseodaphnopsis. Imaging technique: Illustration Original type data: TYPE: Ecuador. Zamora-Chinchipe: Palanda, Reserva Tapichalaca, near rd. betw. Yangana & Valladolid, S of Podocarpus National Park, around lodge at Tapichalaca, in montane forest, upper Río Chinchipe watershed, 04°29'44"S, 79°07'55"W, 2500–2700 m, 31 Oct. 2006, H. van der Werff, B. Gray & W. Quizhpe 21874 (holotype, MO!; isotypes, HBG!, HUT!, LOJA!, QCNE!). License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/100527269 Photo: Jens G. Rohwer
Title: Persea calva Rohwer & van der Werff Accepted name: Persea calva Rohwer & van der Werff Collector: van der Werff Collection Number: 21874 Nomenklaturstatus: accepted Family: Lauraceae Genus: Persea Comments: Floral details of holotype from MO; reverse side of drawing. An unusual species, likely to be transferred to a different genus; apparently close to Asian Alseodaphnopsis. Imaging technique: Illustration Original type data: TYPE: Ecuador. Zamora-Chinchipe: Palanda, Reserva Tapichalaca, near rd. betw. Yangana & Valladolid, S of Podocarpus National Park, around lodge at Tapichalaca, in montane forest, upper Río Chinchipe watershed, 04°29'44"S, 79°07'55"W, 2500–2700 m, 31 Oct. 2006, H. van der Werff, B. Gray & W. Quizhpe 21874 (holotype, MO!; isotypes, HBG!, HUT!, LOJA!, QCNE!). License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/100527269 Photo: Jens G. Rohwer
Title: Persea calva Rohwer & van der Werff Accepted name: Persea calva Rohwer & van der Werff Collector: van der Werff Collection Number: 21874 Nomenklaturstatus: accepted Family: Lauraceae Genus: Persea Comments: An unusual species, likely to be transferred to a different genus; apparently close to Asian Alseodaphnopsis. Imaging technique: Illustration Original type data: TYPE: Ecuador. Zamora-Chinchipe: Palanda, Reserva Tapichalaca, near rd. betw. Yangana & Valladolid, S of Podocarpus National Park, around lodge at Tapichalaca, in montane forest, upper Río Chinchipe watershed, 04°29'44"S, 79°07'55"W, 2500–2700 m, 31 Oct. 2006, H. van der Werff, B. Gray & W. Quizhpe 21874 (holotype, MO!; isotypes, HBG!, HUT!, LOJA!, QCNE!). License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/100527269 Photo: Jens G. Rohwer
Title: Persea calva Rohwer & van der Werff Accepted name: Persea calva Rohwer & van der Werff Collector: van der Werff Collection Number: 21874 Nomenklaturstatus: accepted Family: Lauraceae Genus: Persea Comments: Floral details of holotype from MO; front side of drawing. An unusual species, likely to be transferred to a different genus; apparently close to Asian Alseodaphnopsis. Imaging technique: Illustration Original type data: TYPE: Ecuador. Zamora-Chinchipe: Palanda, Reserva Tapichalaca, near rd. betw. Yangana & Valladolid, S of Podocarpus National Park, around lodge at Tapichalaca, in montane forest, upper Río Chinchipe watershed, 04°29'44"S, 79°07'55"W, 2500–2700 m, 31 Oct. 2006, H. van der Werff, B. Gray & W. Quizhpe 21874 (holotype, MO!; isotypes, HBG!, HUT!, LOJA!, QCNE!). License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/100527269 Photo: Jens G. Rohwer
Title: Persea calva Rohwer & van der Werff Accepted name: Persea calva Rohwer & van der Werff Collector: van der Werff Collection Number: 21874 Nomenklaturstatus: accepted Family: Lauraceae Genus: Persea Comments: Floral details of holotype from MO; reverse side of drawing. An unusual species, likely to be transferred to a different genus; apparently close to Asian Alseodaphnopsis. Imaging technique: Illustration Original type data: TYPE: Ecuador. Zamora-Chinchipe: Palanda, Reserva Tapichalaca, near rd. betw. Yangana & Valladolid, S of Podocarpus National Park, around lodge at Tapichalaca, in montane forest, upper Río Chinchipe watershed, 04°29'44"S, 79°07'55"W, 2500–2700 m, 31 Oct. 2006, H. van der Werff, B. Gray & W. Quizhpe 21874 (holotype, MO!; isotypes, HBG!, HUT!, LOJA!, QCNE!). License: CC-BY-SA-4.0 Copyright: Jens G. Rohwer Tropicos Link: https://tropicos.org/name/100527269 Photo: Jens G. Rohwer
Title: Persea spec., Campos 6593 Accepted name: Persea Mill. Collector: Campos Collection Number: 6593 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., Campos 6620 Accepted name: Persea Mill. Collector: Campos Collection Number: 6620 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 cf. areolatocostae (C.K. Allen) van der Werff Accepted name: Persea cf. areolatocostae (C.K. Allen) van der Werff Collector: Rodriguez Collection Number: 2869 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/17804735 Photo: Jens G. Rohwer
Title: Persea cf. areolatocostae (C.K. Allen) van der Werff Accepted name: Persea cf. areolatocostae (C.K. Allen) van der Werff Collector: Rodriguez Collection Number: 2869 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/17804735 Photo: Jens G. Rohwer
Title: Persea aff. areolatocostae (C.K. Allen) van der Werff Accepted name: Persea aff. areolatocostae (C.K. Allen) van der Werff Collector: Vargas Collection Number: 3559 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/17804735