Ancistrotropis peduncularis
Amer. J. Bot. 98: 1704. 2011.
Vines 0.2–1.8 m; often rooting at nodes. Stems ridged, densely spreading-pilose (hairs usually ± tubercular-based), glabrescent. Leaves: stipules lanceolate, 3–12 mm; petiole 1–8.5(–14) cm; rachis 0.5–1.4(–1.9) cm; stipels lanceolate; leaflet blades ovate or ovate-triangular, 1.2–10 × 1.1–6.5 cm, base rounded, truncate or subhastate, sometimes distinctly 3-lobed, apex rounded or subacute to acuminate. Peduncles 1–45 cm. Inflorescences: rachis 0.3–2 cm, with conspicuous glandular nodes; bracts deciduous. Pedicels erect, 2–4 mm; bracteoles deciduous, linear, 1.5 mm. Flowers: calyx tube 6 mm, lobes deltate, 2 mm, adaxial lobe rounded, emarginate, glabrous or pubescent; corolla 1.5 cm; banner oblong, with flaplike auricles at base, above claw; wings spatulate, right wing twisted to horizontal position; keel pale, tinged blue, twisted, beak hooked, with distalmost portion splayed open, inner margins of keel beak not fused but closed by conspicuous interlocking marginal hairs. Legumes 6–10 × 0.2–0.5 cm. Seeds dark red or brown, angular, narrowly oblong, 4 mm; hilum relatively small, subcentral.
Phenology: Flowering Aug.
Habitat: Riparian in pine-oak forests.
Elevation: 1300 m.
Distribution
Ariz., Mexico (Chiapas, Guerrero, Jalisco, Michoacán, Nayarit, Oaxaca, Sinaloa, Sonora, Tabasco, Veracruz), Central America, South America.
Discussion
Ancistrotropis peduncularis is characterized by its hook-shaped keel and erect fruits. It has been collected only once in the flora area [J. L. Gardner 17 (US) in 1953], in riparian forests in Walnut Wash, one mile north of Tombstone, Cochise County.
Selected References
None.