Eriosema stenophyllum Harms

  • Authority

    Acevedo-Rodríguez, Pedro. 1993. Systematics of Serjania (Sapindaceae) Part I: A Revision of Serjania Sect. Platycoccus. Mem. New York Bot. Gard. 67: 1-91.

  • Family

    Fabaceae

  • Scientific Name

    Eriosema stenophyllum Harms

  • Description

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    Species Description - Herb to 75 cm high, with few-several, slender, erect or ascending stems from woody base, the stems glabrous or glabrate. Stipules narrowly lanceolate, caducous externally sericeous, 11-13 mm long, 2.0-2.5 mm wide. Petiolules 3-6 mm long sericeous or glabrate. Leaflet 1, linear to narrowly lanceolate, coriaceous, apex acute, base usually cuneate, 6-10 (-13) cm long, 5.0-12.5 mm wide, glabrous to lightly sericeous on both surfaces, midrib prominent beneath. Inflorescences 2-3 cm long, densely silky-pubescent, few-flowered (ca. 12), the flowers in globose clusters at end of peduncle, peduncles 1.0-3.5 mm long, pedicels 2.0-2.5 mm long. Bracts lanceolate, persistent, 7.0-7.5 mm long, 2.5-3.0 mm wide. Calyx 12.5-13.0 mm long, tube 4.5-5.0 mm long, lobes 5.5-8.0 mm long. Corolla yellow, 13-15 mm long. Standard broadly obovate with bifurcate thickening internally near base, 14.5-15.0 mm long, 10.0-10.5 mm wide, auricles 1 mm long, claw 2.5-3.0 mm long. Wings broadly oblong, 7.5-8.0 mm long, 4.0-4.5 mm wide, claw 5.5-6.0 mm long. Keel blades 11.5-12.0 mm long, 3.0-3.5 mm wide at maximum, claw 5.5-6.0 mm long. Stamens 11.0-11.5 mm long. Fruit ovate, albo-pilose, 11.0-12.5 mm long, 7.0-8.5 mm wide. Seeds broadly oblong, black, 5.0-5.5 mm long, 1.5-2.0 mm wide.

    Distribution and Ecology - Distribution. Central and southeastern Brazil (Fig. 10). Occurring primarily in campo-cerrados, on rocky slopes; at elevations of 1200-1250 m.

  • Discussion

    Photograph of holotype (NY) examined: Brazil, Goias, "Rio Areas." Glaziou 20927. Sep 1894. Isotypes (F, K).

    The most striking aspect of the endemic Eriosema stenophyllum is the leaflets, which are willow-like in their appearance. The glabrous or near-glabrous stems and leaflets resemble those of E. irwinii and E. glabrum, but E. stenophyllum is easily distinguished by its unifoliolate leaflets and silvery-pubescent racemes.