Dalea emarginata |
Dalea cylindriceps |
|
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wedgeleaf prairie clover |
Andean prairie clover |
|
Stems | (1.5–)2–6 dm, with scattered, small, raised glands distally. |
(1–)3–6(–8) dm, dotted with small raised glands distally. |
Inflorescences | spikes, densely flowered, inconspicuously involucrate (lowest bracts not subtending flowers), 8.5–10.5(–11) mm diam.; axis not visible, 1–4(–4.5) cm; bracts persistent through anthesis, 1–2.5 mm. |
spikes, densely flowered, not obviously involucrate, 9–12 mm diam.; axis not visible, (1.5–)2.5–18 cm; bracts early deciduous, interfloral ones often held in place by crowded flowers, 4–6.5 mm. |
Peduncles | (6–)10–35(–40) cm. |
(3–)6–20 cm. |
Stamens | 5, sometimes with vestiges of alternate filaments, 3.8–4.6 mm, filaments distinct to 0.9–1.2 mm, anthers 0.5 mm. |
5, 5.3–7.7 mm, filaments distinct to 2.2–4.3 mm, anthers 0.7–0.9 mm. |
Corollas | magenta-purple; not conventionally papilionaceous; banner 3.8–4.4 mm, blade ovate, 1.8 × 1.2 mm; epistemonous petals attached at or abaxial pair just proximal to filament separation, blades 1.6–2 × 0.5–0.9 mm. |
whitish, ochroleucous, faintly greenish, or pink; not conventionally papilionaceous; banner 4.7–6.2 mm, blade broadly triangular to ovate-cordate, 1.4–2.7 × 1.6–2.1 mm; epistemonous petals attached at separation of filaments, blades 1.5–4 × 0.3–0.8 mm. |
Calyces | asymmetric, recessed opposite banner, 3–4.2 mm, densely pilosulous; tube 1.8–2.2 mm, with 4–7 blister glands between ribs, lobes ovate. |
± asymmetric, slightly recessed opposite banner, 3.4–4.3 mm, pilose; tube 1.9–2.3 mm, with 2–5 small, pale blister glands between ribs, lobes lanceolate to ovate. |
Legumes | 2.4–2.8 mm, pilosulous distally and gland-dotted. |
2.5–3 mm, pilosulous distally and gland-dotted. |
Seeds | 1.6–1.9 mm. |
1.7–2.1 mm. |
Annual | herbs (sometimes overwintering), erect, ± glabrous proximal to inflorescence. |
|
Principal | leaves (1–)1.5–3.5 cm; leaflets (5–)11–17, blades oblong-oblanceolate or obovate, 4–9 mm. |
leaves 3–7 cm; leaflets 7 or 9, blades oblanceolate to oblong-elliptic, (12–)15–25 mm. |
Perennial | herbs, short-lived, erect, glabrous proximal to inflorescences. |
|
2n | = 14. |
|
Dalea emarginata |
Dalea cylindriceps |
|
Phenology | Flowering fall–winter. | Flowering summer. |
Habitat | Beaches, dunes, sandy soils. | Sandy soils or gravelly places near streams, sandsage shrublands in dunes. |
Elevation | 0–200 m. (0–700 ft.) | 900–1600 m. (3000–5200 ft.) |
Distribution |
LA; TX; Mexico (Tamaulipas, Veracruz) |
CO; KS; NE; NM; OK; SD; TX; WY |
Discussion | Dalea emarginata was first described under Petalostemon but was rejected from that genus by D. K. Wemple (1970) because of its annual habit. R. C. Barneby (1977c) considered it to be taxonomically isolated within Dalea. Adaxial surfaces of the leaflets often become a remarkable blue-green in drying, a trait observed also in several other daleas that were placed in Petalostemon and in the evidently distantly related yellow-petaled D. nana. In Texas, D. emarginata is known from the southern half of the state, east of the Big Bend region. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Dalea cylindriceps is wide-ranging; its distribution is discontinuous and it is seldom common. Although many of the specimens show a strong perennial root, others look more like sturdy annuals, having perhaps flowered during the first year of growth. In Texas, the species is known from the trans-Pecos and west-central part of the state. The name Dalea compacta has been misapplied to the species now known as D. cylindriceps (R. C. Barneby 1977c). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Faboideae > Dalea | Fabaceae > subfam. Faboideae > Dalea |
Sibling taxa | ||
Synonyms | Petalostemon emarginatus | Petalostemon macrostachyus |
Name authority | (Torrey & A. Gray) Shinners: Field & Lab. 17: 84. (1949) | Barneby: Mem. New York Bot. Gard. 27: 228. (1977) |
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