Contains 12 accepted taxa overall.
Characteristics
Classification
Citation
RHYNCHOSIA Loureiro, Fl. Cochinch. 425, 460. 1790, nom. cons. vs. Dolicholus Medikus 1787, et vs. Cylista Aiton 1789.
-
TYPE: Rhynchosia volubilis Loureiro
Species
| Scientific Name | Common Name | Status | Photos |
|---|---|---|---|
| Rhynchosia cinerea | BROWNHAIR SNOUTBEAN | Native Endemic | |
| Rhynchosia cytisoides | ROYAL SNOUTBEAN | Native | |
| Rhynchosia difformis | DOUBLEFORM SNOUTBEAN | Native | |
| Rhynchosia michauxii | MICHAUX'S SNOUTBEAN | Native | |
| Rhynchosia minima | LEAST SNOUTBEAN | Native | |
| Rhynchosia parvifolia | SMALL-LEAF SNOUTBEAN | Native Threatened-State | |
| Rhynchosia precatoria | ROSARY SNOUTBEAN | Not Native | |
| Rhynchosia reniformis | DOLLARLEAF | Native | |
| Rhynchosia reticulata | HABILLO | Not Native | |
| Rhynchosia swartzii | SWARTZ'S SNOUTBEAN | Native Endangered-State | |
| Rhynchosia tomentosa var. mollissima | TWINING SNOUTBEAN | Native | |
| Rhynchosia tomentosa var. tomentosa | TWINING SNOUTBEAN | Native |
[Family identification key]
1. Leaves with 1(3) leaflets
2
1. Leaves 3-foliolate
3
2. Plant prostrate or trailing, the leaves generally well-spaced and usually not overlapping; calyx 9-15 mm long; fruit scarcely exserted from the calyx
2. Plant erect to 40 cm tall, the leaves generally clustered together and overlapping; calyx 7-10 mm long; fruit much exserted from the calyx
3. Leaflets acuminate at the tip, sometimes only slightly; seeds black or red and black
4
3. Leaflets acute to broadly rounded at the tip (very rarely slightly acuminate); seeds brown
5
4. Stipules absent; leaflet stipels absent; seeds bicolored red and black
4. Stipules persistent; leaflet stipels persistent; seeds red
5. Terminal leaflets 0.8-1.3 times longer than wide
6
5. Terminal leaflets 1.5-2.5 times longer than wide
8
6. Most racemes exceeding the leaves, (1-)4-12 cm long; calyx 2.5-4 mm long
6. Racemes usually shorter than the leaves, 1-4(-8) cm long; calyx 8-14 mm long
8
7. Plant hairs generally <0.4 mm long; petiole pubescent; fruit puberulent
7. Plant hairs commonly >0.7 mm long; petiole hirsute; fruit hirsute and puberulent
8. Plant trailing, prostrate, or vine-like
9
8. Plant erect
10
9. Fresh leaflets bluish or grayish green; leaflets elliptic to elliptic-obovate
9. Fresh leaflets green to olive-green; leaflets generally ovate
10. Leaflets to 2 cm long, 1 cm wide; flowers 1(-3) in the leaf axils; corolla clearly exceeding the calyx
10. Leaflets 2-5(-7) cm long, 1-4 cm wide; flowers numerous in a raceme; corolla subequal to slightly exceeding the calyx
11
11. Stipules caducous; inflorescence a solitary raceme 5-20 cm long
11. Stipules persistent; inflorescence of several racemes 1-3 cm long