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This species is accepted, and its native range is Bolivia.
A specimen from Kew's Herbarium


Goyder, D., & J. Fontella-Pereira. (2005). Notes on Oxypetalum R. Br. (Apocynaceae: Asclepiadoideae) in Bolivia and Peru. Kew Bulletin, 60(1), 95-101. Retrieved from

Lower Risk: Least Concern.
Recorded from the northern half of the Boliviano- Tucumana biogeographic province of Navarro (2002) and Rivas-Martinez & Navarro (2002). So far, the new species has not been recorded from Argentina. Several tropical taxa have their southernmost limits around Los Toldos in the extreme north of Argentina (Meyer 1957; Goyder 2004b), so it is possible that O. fuscum will ultimately be found in this region.
Steep scrubby banks on sandstone, often formerly covered in Tucumán forest - a semi-deciduous sub-humid forest of the region with Cedrella, Crinodendron, Podocarpus and Tabebuia as characteristic constituents. Alt. 800 - 2200 m.
Morphology General
Latex white
Morphology General Habit
Perennial herbaceous vine with stems twining to c. 4 m over other vegetation
Morphology Leaves
Leaves with petiole 0.5 - 1.5(- 2) cm long, densely pubescent; lamina 3 - 8 x 1.3 - 3.5(- 6) cm, elliptic or occasionally suborbicular, or narrowly obovate, apex acute to rounded and with a short apiculus, base rounded or weakly cordate, pubescent on both surfaces but more densely beneath, young leaves tomentose
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anther wings c. 1 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx lobes 2 - 3.5 mm long, linear to narrowly triangular, densely pubescent
Morphology Reproductive morphology Flowers Corolla
Corolla campanulate or urceolate, tube 2 - 3 mm long, 1.5 - 2 mm wide at the mouth, green and pubescent outside, inside brown or purple, glabrous below, upper half of tube bearded with long white hairs; lobes 2 - 4 x 1 - 1.5 mm, oblong or ovate, somewhat truncate apically, held ± erect, green and pubescent abaxially, adaxial face brown or purple, glabrous except for the beard of white hairs near the mouth of the tube
Morphology Reproductive morphology Flowers Corona
Corona gynostegial in origin, but fused to both the base of the staminal column and the lower part of the corolla tube, fused into a tube basally, the free lobes reaching just beyond the mouth of the corolla tube, dorsoventrally compressed, narrowly oblong and with a somewhat truncate, recurved apex
Morphology Reproductive morphology Flowers Gynoecium Style
Stylar head extending 1 - 2 mm beyond the anthers, thick, fleshy, white, the paired appendages fleshy and variously developed, sometimes lobed or toothed themselves
Morphology Reproductive morphology Flowers Pollinarium
Pollinaria minute: corpusculum c. 0.3 mm long, ovoid, brown; translator arms c. 0.1 mm long, flattened and ± ovate; pollinia c. 0.3 x 0.1 mm, flattened, obovate
Morphology Reproductive morphology Fruits
Follicles solitary, 5 - 7.5 cm long, fusiform and tapering gradually into a long-attenuate apex, pubescent.
Morphology Reproductive morphology Inflorescences
Inflorescences extra-axillary with from 2 to c. 25 flowers in a dense, irregularly branched sessile or shortly pedunculate cluster; peduncle to 2 cm long, densely pubescent; bracts c. 1 mm long, linear, densely pubescent; pedicels 2 - 3 mm long, densely pubescent
Morphology Stem
Stems glabrous to densely pubescent with short spreading white hairs
The flowers of Oxypetalum fuscum are similar to those of Oxypetalum dactylostelma Goyder - formerly Dactylostelma boliviense Schltr. (Goyder 2004a), non Oxypetalum boliviense Schltr. (Schlechter 1906: 622) - with their fleshy stylar head appendages and the dense tuft of hairs in the mouth of the corolla tube. The corolla is brown or purple inside in the new species, however, rather than white or cream, and the lax irregularly branched inflorescence of O. dactylostelma is replaced with a dense, shortly pedunculate head of flowers in O. fuscum. The leaves of the new species are only minutely cordate at the base, in strong contrast to the often deeply cordate leaves of O. dactylostelma. The petiole is also much shorter - 0.5 - 1.5 (- 2) cm long rather than 2 - 4 cm long in O. dactylostelma. The new species shares some characteristics with the largely sympatric species 0. brachystemma Malme, with O. ostenii Malme, described from Iguazú in the Argentinean province of Misiones, and O. pearsonii (Rusby) Goyder & Fontella. It can be readily distinguished from these species by the fleshy stylar head.
Bolivia, Santa Cruz, Prov. Cordillera, Alto Camiri, 1 km from main highway c. 3 km S of Camiri, 19 Jan. 2001, Wood & Goyder 16860 (holotypus K; isotypi LPB, USZ).

Native to:


Oxypetalum fuscum Goyder & Fontella appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jul 28, 2005 Wood, J.R.I. [12279], Bolivia 61966.000
Jul 27, 2005 Wood, J.R.I. [13746], Bolivia 62665.000
Jul 27, 2005 Wood, J.R.I. [16089], Bolivia 72202.000
Jul 27, 2005 Wood, J.R.I. [14441], Bolivia 72222.000
Jan 12, 2005 Wood, J.R.I. [9702], Bolivia 60340.000
Jan 12, 2005 Wood, J.R.I. [9401], Bolivia 60346.000
Wood, J. R. I. [16860], Bolivia K000196853 holotype

First published in Kew Bull. 60: 95 (2005)

Accepted by

  • Farinaccio, M.A. & Goyder, D. (2016). A synopsis of Oxypetalum (Apocynaceae) in Bolivia, with the description of one new species and a key to species in Bolivia Phytotaxa 267: 16-28.


Kew Bulletin

  • --- & Schwarz, E. de A. (1981). Contribuição ao estudo das Asclepiadaceae Brasileiras, XVI. Novos sinônimos e uma nova combinação. Bradea 3 (22): 159-163.
  • ---, Hatschbach, G. & Hartmann, R. W. (1985). Contribuição ao estudo das Asclepiadaceae do Paraná III. Notas preliminares. Bol. Mus. Bot. Mun. Curitiba 64: 1 - 47.
  • ---, Valente, M. da C, Marquete, N. F. da S. & Ichaso, C. L. F. (2004). Apocináceae-Asclepiadoideas. In: R. Reitz & A. Reis (eds.), Flora Ilustrada Catarinense, Monografia - Asclepiadáceas, 1 - 250.
  • Dorr, L. J. (1992). The vascular plant collections of R. S. Williams from Bolivia and Peru (1901 - 1902). Brittonia 43: 211-239.
  • Dubs, B. (1998). Prodromus florae Matogrossensis, part I. Checklist of Angiosperms, part II. Types from Mato Grosso. Betrona-Verlag.
  • Ezcurra, C. (1999). Asclepiadaceae. In: F. O. Zuloaga & O. Morrone (eds), Catálogo de las plantas vasculares de la República Argentina II: 78 - 98. Missouri Botanical Garden Press.
  • Fontella-Pereira, J., Goyder, D. J. & Marquete F. da Silva, N. (2005). Infraspecific variation in Oxypetalum cordifolium (Vent.) Schltr. (Apocynaceae- Asdepiadoideae). Kew Bull. 60: 103 - 109.
  • Goyder, D. J. (2004a). The identities of Corollonema Schltr., Dactylostelma Schltr. and Metoxypetalum Morillo (Apocynaceaer. Asclepiadoideae). Kew Bull. 59: 301 - 303.
  • Lillo, M. (1919). Las Asclepiadáceas argentinas. Physis (Buenos Aires) 4: 410 - 437.
  • Malme, G. O. A. (1900). Die Asclepiadaceen des Regnell'schen Herbars. Kongl. Svenska Vetensk. Acad. Handl. 34 (7): 1-101.
  • Meyer, T. (1943). Revisión de las especies Argentinas del género Oxypetalum (Asclepiadaceae). Lilloa 9: 5 -72.
  • Navarro, G. (2002). Provincia biogeográfica Boliviano-Tucumana. In: G. Navarro & M. Maldonado, Geografía ecológica de Bolivia: vegetación y ambientes acuáticos: 349-451. Centro de Ecología Simón I. Patiño, Cochabamba.
  • Occhioni, P. (1971). Duas novas especies de Oxypetalum para a flora do Brasil. Leandra 1(1): 7 - 11.
  • Rivas-Martínez, S. & Navarro, G. (2002). Mapa biogeográfico de América del Sur. In: G. Navarro & M. Maldonado, Geografía ecológica de Bolivia: vegetación y ambientes acuáticos. Fig. I. 14, pp. 42 - 43. Centro de Ecología Simón I. Patiño, Cochabamba.
  • Rusby, H. H. (1912). New species from Bolivia, collected by R. S. Williams - 2. Bull. New York Bot. Gard. 8:89-135.
  • Schlechter, R. (1906). Asclepiadaceae andinae. In: I. Urban, Plantae novae andinae imprimir Weberbauerianae. II. Bot. Jahrb. Syst. 37: 601 - 627.
  • — (1927). Descriptions of new genera and species of plants collected on the Mulford Biological Exploration of the Amazon Valley, 1921 - 1922. Mem. New York Bot. Gard. 7: 205 - 387.
  • — (1944). Asclepiadaceae. In: H. R. Descole (ed.), Genera et species plantarum argentinarum 2: 1 - 273 & 121 plates.
  • — (1957). Contribuciones a la flora fanerogamica Argentina. I. Dos arboles nuevos para la flora Argentina. Bol. Soc. Argent. Bot. 7: 12-16.
  • — (2004b). An amplified concept of Philibertia Kunth (Apocynaceae: Asclepiadoideae), with a synopsis of the genus. Kew Bull. 59: 415 - 451.

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