Beat Ernst Leuenberger's research while affiliated with Freie Universität Berlin and other places

Publications (21)

Article
The taxonomic history of the three genera Pereskia, Maihuenia, and Blossfeldia is reviewed and discussed in the context of general historical aspects of cactus taxonomy and in view of ongoing discussion on evolution and phylogenetic position of the three genera. Some updates and additional observations complementing earlier monographic treatments o...
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The taxonomic history of Zephyranthes andina (≡ Haylockia andina) and five related taxa is analysed. The study of herbarium material and photographs, and observation of live plants in the field and in cultivation allowed an evaluation of the variation of flower characters, such as style length, used by other authors for taxonomic delimitation of Z....
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A short history of the Cactaceae holdings of the Berlin herbarium and their fate is provided. While a considerable number of historical spirit specimens have escaped the destruction of the herbarium during World War II, the pre-1943 collection of pressed specimens was lost almost entirely. More than half of the present Cactaceae holdings of B were...
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Leuenberger, B. E. & Arroyo-Leuenberger, S.: Humboldt, Bonpland, Kunth and the type specimen of Rauhia multiflora (Amaryllidaceae) from Peru. - Willdenowia 36 (Special Issue): 601-609. - ISSN 0511-9618; © 2006 BGBM Berlin-Dahlem. doi:10.3372/wi.36.36157 (available via http://dx.doi.org/) The Humboldt & Bonpland type collection of the name Phaedrana...
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Eggli, U. & Leuenberger, B. E.: The Cárdenas type specimens ofCactaceae names in the herbarium of the Instituto Miguel Lillo, Tucumán, Argentina (LIL). - Willdenowia 35: 179-192. - ISSN 0511-9618; © 2005 BGBM Berlin-Dahlem. doi:10.3372/wi.35.35115 (available via http://dx.doi.org/) A list of type specimens ofCactaceae names in the collection of the...
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Leuenberger, B. E.: The Cactaceae of the Willdenow herbarium, and of Willdenow (1813). — Willdenowia 34: 309–322. — ISSN 0511-9618; © 2004 BGBM Berlin-Dahlem. The origin and identification of the 28 specimens of Cactaceae in the Willdenow herbarium in Berlin (B-W) are discussed. The eight Humboldt & Bonpland specimens from South America constitute...
Article
Cactaceae specimens collected by Humboldt & Bonpland in tropical America and kept in the herbaria at Paris and in the Willdenow herbarium at Berlin are listed and discussed. Of the 15 taxa treated by Kunth, in 1823, in “Nova genera et species plantarum”, ten specimens from Venezuela, Colombia, Ecuador and Peru are extant in the Humboldt & Bonpland...
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The taxonomic history of Cactus serpens, the basionym of Cereus serpens, Cleistocactus serpens, Bolivicereus serpens, Borzicactus serpens and Borzicactella serpens, is analysed. The combination Cleistocactus serpens is of particular interest because WEBER explicitly mentioned the original material in the HUMBOLDT & BONPLAND herbarium at Paris (P-Bo...
Article
Abstract Leuenberger, B. E.: Welwitschia mirabilis (Welwitschiaceae), male cone characters and a new subspecies. – Willdenowia 357-381. – ISSN 0511-9618. Based on the observation of male cones in plants of old stock of Welwitschia mirabilis cultivated in the
Article
Leuenberger, B. E.: Opuntia paraguayensis (Cactaceae) reassessed. - Willdenowia 31: 181-187. 2001. - ISSN 0511-9618. The confusing history of the name Opuntia paraguayensis is described. A closer examination of the protologue as compared to the use of the name in literature revealed that it has been misapplied to O. elata and O. cardiosperma. The t...
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Leuenberger, B. E.: The type specimen of Opuntia cardiosperma (Cactaceae), new synonyms and new records from Argentina and Paraguay. — Willdenowia 31: 171–179. 2001. — ISSN 0511-9618. The type specimen of Opuntia cardiosperma (Cactaceae) from Paraguay, extant in the spirit collection of the Berlin-Dahlem herbarium, is illustrated. Comparison with u...
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Leuenberger, B. E.: Confirmation of the authorship of Cereus martinii Labour., basionym of Harrisia martinii (Cactaceae). — Willdenowia 30: 147–153. 2000. — ISSN 0511-9618. The date of valid publication of Cereus martinii, a name listed from three different sources in Index Kewensis, is ascertained to be 1854. Labouret's protologue, which appeared...
Article
The genus Eulychnia was named by R.A. Philippi in 1860 and based on E. breviflora, a columnar cactus from Chile. A total of ten specific names have been published from Chile and one from Peru, about half of them since 1950. Although eulychnias are known to all travelers to Chile and have been often mentioned in the literature, no detailed study has...
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Eggli, U. & Leuenberger, B. E.: On colour forms of Opuntia weberi (Cactaceae) with notes on the typification of the name. − Willdenowia 28: 175-180. 1998. − ISSN 0511-9618. A pink-flowered population of Opuntia weberi is reported from San Juan Province, Argentina. The variation and geographical distribution of the species are discussed. Investigati...
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Arroyo-Leuenberger, S. & Leuenberger, B. E.: Type specimens of names in Misodendraceae at the Berlin-Dahlem herbarium (B). — Willdenowia 28: 249–252. 1998. — ISSN 0511-9618. Specimens at the Berlin-Dahlem herbarium collected by Commerson, Dusén, Kuntze and Pöppig, and representing original material (isotypes) of names in Misodendrum, are listed and...
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After a survey of the taxonomic history of the genus Blossfeldia (Cactaceae), the distribution of B. liliputana in Argentina based on voucher specimens is discussed and a map showing the general distribution of the genus (Argentina and Bolivia) is provided. Accepted names and synonyms of Blossfeldia in Argentina are listed. Notes on the seeds, seed...
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Stems of Eulychnia (a genus of six to nine species of candelabriform or arborescent cacti) have a parenchymatic cortex with two distinct regions. The outer chlorenchymatic layer is characterized by a conspicuous parallel striping, whereas the inner cortex region devoid of chlorophyll has a coarsely granular aspect. Stem samples from nine accessions...
Article
The preparation of conventional pressed and dried herbarium specimens by using a commercial hair-drier and a bag of tightly woven, fire-resistant tissue is described. It has proved particularly useful for preparing specimens of succulent plants.

Citations

... Some studies of Eulychnia have been conducted that deal with distribution and the conservation status (Bustamante, 1996;Belmonte et al., 1998), taxonomy (Leuenberger and Eggli, 2000;Hoffmann and Walter, 2004), morphoanatomical characteristics of stems (Nyffeler et al., 1997), floral orientation (Warren et al., 2017), Tristerix aphyllus infestation (Martínez del Río et al., 1995), pattern of recruitment (Cares et al., 2018) and morphological and genetic characterization (Jana et al., 2017). No phenological information has been reported, which is important since harvesting of fruits has become a fledgling productive activity. ...
... Unlike any other Cactaceae, Blossfeldia is also desiccation-tolerant. Like Opuntioideae, Blossfeldia also possesses arilate seeds (Anderson, 2001). Both Blossfeldia and Maihueniopsis s.l. are found in Argentina and Bolivia (Leuenberger & Eggli, 1998). More derived members of Cactoideae and Opuntioideae share a trend towards increased arborescence (cf. ...
... Despite the interest in its cultivation, little is known about its origin and phylogeny. O. megacantha and O. streptacantha have been considered O. ficus-indica ancestors, but these two species are often confused (Leuenberger, 1978). According to Griffiths (1914), O. megacantha ( Fig. 7.3) could be a wild thorny form of cultivated O. ficus-indica; this hypothesis was then discussed by Griffith (2004), who evidenced some relationships among the two species. ...
... The systematics of sect. Eriocereus of the Gran Chaco region of South America were revised by Kiesling (1996) and Leuenberger (1995Leuenberger ( , 2000aLeuenberger ( , 2000bLeuenberger ( , 2001. A detailed synopsis of the one species in eastern Brazil, Harrisia adscendens, was provided by Taylor and Zappi (2004). ...
... (see also Kattermann 1994) species from Chile, Perú, and Argentina form a strongly supported monophyletic clade, but only with the exclusion of Rimacactus laui (Lüty) Mottram, a species that had been included within Eriosyce section Neoporteria subsection Chileosyce by Kattermann (1994, as Eriosyce laui Lüthy) and within the "Islaya-group" by Hunt et al. (2006, 2013. (Eggli et al. (1995) and Hunt (2003) The plants are sometimes covered by light snow Fig. 300.2, Eriosyce eriosyzoides) shows a well visable areole measuring 5 mm long and 3 mm wide (= oval); Hoffmann (1998: Lam. ...
... For other specimen drying methods, such as using gas dryers, electric hair dryers and other portable plant dryers see:MacDaniels 1930, Schnell 1960, Hallé 1961, Botha and Coetzee 1976, Womersley 1981, Eggli and Leuenberger, 1996 ...
... Within this longish range, Welwitschia inhabits quite different environments, including temperate coastal habitats affected by fog and sandstorms as well as hot inland desert margins towards arid savannas, which receive their moisture via tropical convective thunderstorms (Henschel and Seely, 2000;Henschel et al., 2019). Leuenberger (2001) recognized two subspecies within W. mirabilis subsp. namibiana Leuenberger from Namibia and the typical subsp. ...
... More research is warranted to determine whether or not O. militaris is distinct from O. triacantha, but given the morphological and phylogenetic data presented here, we suggest that O. militaris should be regarded as a separate species. The type specimen of O. triacantha deposited at the Willdenow Herbarium at Berlin- Dahlem (B-W) was not relocated and thus presumably destroyed in the 1940s (Leuenberger, 2004). Other herbaria where Willdenow deposited type specimens (see Stafleu & Cowan, 1988) were reviewed and no type material of O. triacantha was located, thus we designate a neotype below. ...
... Beyond that, many European naturalists that migrated to the New World and started to contribute to the knowledge of local floras also often failed to cite original materials or provide precise descriptions of the novel species proposed (Spegazzini 1899(Spegazzini , 1901(Spegazzini , 1902(Spegazzini , 1905(Spegazzini , 1925Arechavaleta 1905). Recently, major efforts have been made to better assess the identity and the interpretation of many of these names with typifications and a handful of taxonomic revisions (Crook & Mottram 1995, 1996, 1997, 1998, 1999, 2002, 2003, 2004, 2005Leuenberger 1993Leuenberger , 2001aLeuenberger , 2001bLeuenberger , 2002Font 2014;Las Peñas et al. 2017). ...
... long or short, straight or curved, and their color ranges from white, yellow, red, to brownish. The color of flowers varies from yellow to orange, red and pink (Eggli and Leuenberger, 1998). The yellow through red flower colors are unusual and atypical within the genus Tephrocactus, in which white to pink is more common. ...