Dalea emarginata |
Dalea reverchonii |
|
---|---|---|
wedgeleaf prairie clover |
Comanche Peak prairie clover |
|
Stems | (1.5–)2–6 dm, with scattered, small, raised glands distally. |
1.5–2 dm, eglandular. |
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, loosely flowered, not involucrate, 8–10 mm diam.; axis visible, 1.5–5 cm; bracts deciduous, 2.5 mm. |
Peduncles | (6–)10–35(–40) cm. |
0–1 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, 6.1–7.2 mm, filaments distinct to 3.3–4 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. |
magenta-purple; not conventionally papilionaceous; banner 4.3–4.6 mm, blade ovate to elliptic, 2.1–2.3 × 1.8–2 mm; epistemonous petals attached at separation of filaments, blades 2.6–3 × 1.1–1.3 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. |
subsymmetric, 4.2–4.6 mm, silky-pilosulous to -tomentulose, hairs subappressed; tube 1.9–2.1 mm, with ribs leading to sinuses stronger than those leading to lobes, tube appearing bluntly 5-angled, with 0 glands between ribs, lobes lanceolate-acuminate or adaxial pair triangular-acuminate. |
Legumes | 2.4–2.8 mm, pilosulous distally and gland-dotted. |
3.1–3.5 mm, pilosulous and gland-dotted distally. |
Seeds | 1.6–1.9 mm. |
1.3 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 2–3 cm; leaflets 7 or 9, blades linear-oblong or -oblanceolate, 5–12 mm. |
Perennial | herbs, decumbent, pilosulous. |
|
Dalea emarginata |
Dalea reverchonii |
|
Phenology | Flowering fall–winter. | Flowering spring–early summer (fall). |
Habitat | Beaches, dunes, sandy soils. | Rocky limestone soils. |
Elevation | 0–200 m. (0–700 ft.) | ca. 400 m. (ca. 1300 ft.) |
Distribution |
LA; TX; Mexico (Tamaulipas, Veracruz) |
TX |
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 reverchonii occurs in Hood, Parker, and Wise counties in north-central Texas. It is in the Center for Plant Conservation’s National Collection of Endangered Plants. (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 reverchonii |
Name authority | (Torrey & A. Gray) Shinners: Field & Lab. 17: 84. (1949) | (S. Watson) Shinners: Field & Lab. 17: 84. (1949) — (as reverchoni) |
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