Desmanthus velutinus |
|
---|---|
velvet bundleflower |
|
Habit | Herbs, decumbent to erect, much-branched, to 5 dm; taproot cylindric, bark red or brown, 5+ dm. |
Stems | , pinnae, and rachises usually uniformly velutinus with spreading, white hairs, rarely sparsely pubescent or glabrous. |
Leaves | 2.1–6.8 cm; stipules persistent, 1.7–4.5 mm, with erose, membranous wing curved under petiole, densely villous; petiole 4–12 mm; pinnae 3–7 pairs; nectary sessile, crateriform, between proximal pair of pinnae, sometimes also between distal pairs of pinnae; leaflets 24–44, blades 2.4–5.8 mm, venation obscure except for nearly centric midvein, surfaces glaucous, pubescent abaxially. |
Peduncles | 1.9–4 cm, 2.8–6.5 cm in fruit. |
Flowers | stamens 10; staminodia 7.5–10.5 mm; style slightly exserted beyond stamens. |
Legumes | dark brown, straight, linear, sometimes irregularly constricted between seeds, dehiscent along both sutures, 4.2–8.2 cm × 2.1–3.5 mm, apex acute to attenuate with beak 1–6 mm. |
Heads | 1 per axil, 15–33-flowered; sterile flowers 7–13 per head; staminate and bisexual flowers 11–20 per head. |
2n | = 28. |
Desmanthus velutinus |
|
Phenology | Flowering Apr–Jun (Aug), fruiting May–Jul(–Oct). |
Habitat | Oak and juniper woodlands, drier habitats with Acacia and Prosopis. |
Elevation | 200–1900 m. (700–6200 ft.) |
Distribution |
NM; TX; Mexico (Coahuila) |
Discussion | Desmanthus velutinus is sometimes confused with 4. D. cooleyi and 10. D. obtusus; see discussions under those species for distinguishing characteristics. The range of D. velutinus is limited to central Texas along the Balcones Fault, southwest to trans-Pecos and Rio Grande plain, southern New Mexico, and adjacent Coahuila, Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Caesalpinioideae (Mimosoid clade) > Desmanthus |
Sibling taxa | |
Name authority | Scheele: Linnaea 21: 455. (1848) |
Web links |