Rhynchosia minima

(Linnaeus) de Candolle in A. P. de Candolle and A. L. P. P. de Candolle

Prod. 2: 385. 1825.

Common names: Least snoutbean
Basionym: Dolichos minimus Linnaeus Sp. Pl. 2: 726. 1753
Synonyms: Dolicholus minimus (Linnaeus) Medikus Glycine lamarckii Kunth G. reflexa Baldwyn ex Nuttall Phaseolus caribaeus Eaton & Wright Rhynchosia aureoguttata Andersson R. exigua Andersson R. mexicana Hooker & Arnott R. minima var. diminifolia Walraven R. minima var. lutea Eggers R. minima var. pauciflora Kuntze R. punctata de Candolle
Treatment appears in FNA Volume 11.

Herbs or subshrubs. Stems usually prostrate or twining, rarely ascending, rarely viscid, glabrous, puberulent, or villosulous, hairs silvery or grayish, spreading or reflexed. Leaves trifoliolate; stipules persistent, linear to lanceolate, 1–6 × 1–2 mm, apex acuminate, surfaces puberulent to villosulous; petiole 4–100 mm, glabrous, tomentulose, or villosulous; leaflet blades rhombic-orbiculate, rhombic, subrhombic, or ovate, 30–90 × 5–70 mm, membranous or nearly leathery, gland-dotted, base obtuse to rounded, cuneate, or truncate, apex acuminate to obtuse, surfaces glabrous, puber­ulent, or sparsely to densely villosulous abaxially, glabrous or finely strigose, villosulous, or puberulent adaxially. Inflorescences racemes, longer than leaves, 2–20 cm. Pedicels 1–5 mm. Flowers: calyx 3–6 mm, puberulent or villosulous, tube 1.5–2 mm, lobes lanceolate, laterals 1.5–4 mm, lengths to 2.5 times tube, adaxials 0.5–1 mm; corolla yellow, veined purple or brown; banner orbiculate-ovate, 4–6 × 3–5 mm, emarginate, puber­ulent, gland-dotted; wings narrowly oblong, 4.5–5 × 1–2 mm, narrowly gland-dotted, puberulent apically; keel 5–6 × 2–3 mm, glabrous; stamens 5–7 mm. Legumes falcate to oblong-ovoid, compressed, 9–20 × 3–5 mm, glabrous, puberulent, or villosulous. Seeds grayish, brown, black, or mottled, ovoid-reniform, plump, 3–4 × 2–3 mm. 2n = 22.


Phenology: Flowering spring–summer.
Habitat: Disturbed areas, forests, edges, prairies, sand dunes.
Elevation: 0–100 m.

Distribution

Ala., Ark., Fla., La., Miss., Mo., Tex., West Indies, Bermuda, Central America, South America.

Discussion

Rhynchosia minima was recently collected in Alabama after an absence of over 100 years (A. R. Diamond 2015).

Glycine littoralis Vahl ex de Candolle is an illegitimate name that pertains here.

Selected References

None.

Lower Taxa

None.
... more about "Rhynchosia minima"
Michael Woods +
(Linnaeus) de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
Dolichos minimus +
Least snoutbean +
Ala. +, Ark. +, Fla. +, La. +, Miss. +, Mo. +, Tex. +, West Indies +, Bermuda +, Central America +  and South America. +
0–100 m. +
Disturbed areas, forests, edges, prairies, sand dunes. +
Flowering spring–summer. +
Dolicholus minimus +, Glycine lamarckii +, G. reflexa +, Phaseolus caribaeus +, Rhynchosia aureoguttata +, R. exigua +, R. mexicana +, R. minima var. diminifolia +, R. minima var. lutea +, R. minima var. pauciflora +  and R. punctata +
Rhynchosia minima +
Rhynchosia +
species +