Dalea greggii |
Dalea lasiathera |
|
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Gregg's dalea, Gregg's prairie clover |
purple dalea |
|
Habit | Subshrubs, horizontal-spreading, mat-forming, at least young foliage silky-pilosulous. | |
Stems | procumbent or arching, often rooting along stems, 3–5(–20+) dm, eglandular or glandular-verruculose distally. |
1–3(–3.5) dm, sparsely gland-dotted. |
Inflorescences | spikes, relatively densely flowered, not involucrate, 8–11 mm diam.; axis usually not visible, 0.4–3(–5.5) cm; bracts persistent, 2–4 mm. |
spikes, relatively densely flowered, not involucrate, 11–13 mm diam.; axis not to partially visible, 2–6 cm; bracts persistent, (3–)3.5–5.5 mm. |
Peduncles | 0–4(–6) cm. |
1.5–5(–6) cm. |
Stamens | 10, 5.5–7.5 mm, filaments distinct to 1.7–2.4 mm, anthers 0.5–0.7 mm. |
10, 8.5–12 mm, filaments distinct to 3.4–4.7 mm, anthers 0.8–1.2 mm. |
Corollas | bicolored, banner cream to pale yellow, reddish in age, epistemonous petals pink to pink-purple; papilionaceous; banner 4.4–6.2 mm, blade deltate-cordate, 2.6–3.5 × 3.2–4.3 mm, proximal lobes connate, forming obconic pit; epistemonous petals attached proximal to middle of stamen tube; wings 3.2–4.6 × 1.6–2.4 mm; keel connate valvately, blades 4–4.8(–5.3) × 2.2–3.3 mm. |
violet-purple, banner with yellowish center; papilionaceous; banner 6.2–7.5 mm, blade broadly ovate, 3.8–4.6 × 4.2–5 mm, proximal lobes connate, forming obconic pit; epistemonous petals attached near or proximal to middle of stamen tube; wings 3.7–4.7 × 2.2–3 mm; keel connate valvately, blades 5.3–6.5 × 2.3–3.7 mm. |
Calyces | subsymmetric, (4–)4.2–6 mm, silky-pilosulous; tube (2–)2.2–2.8(–3) mm, usually with 3–8(–10) blister glands between ribs (scattered or in a row), lobes triangular-acuminate to lanceolate or aristate, unequal, abaxial longest. |
± asymmetric, opening oblique, 5.3–6.9 mm, silky-pilosulous; tube 3.3–3.9 mm, with 3–5(–16) glands between ribs, lobes triangular-subulate, not plumose. |
Legumes | 2.1–2.8 mm, pilosulous and gland-dotted distally. |
3–3.5 mm, pilosulous distally, eglandular. |
Seeds | 1.6–2 mm. |
2.3 mm. |
Principal | leaves 0.6–2.5(–3) cm; leaflets 5–9, blades obovate to oblanceolate, 2–7(–9) mm. |
leaves (1–)1.5–3 cm; leaflets (3–)7–11, blades linear-oblanceolate to elliptic, 5–12 mm. |
Perennial | herbs, decumbent to ascending, glabrous proximal to inflorescences. |
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2n | = 14 (Mexico). |
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Dalea greggii |
Dalea lasiathera |
|
Phenology | Flowering spring, fall, (year-round). | Flowering spring (fall). |
Habitat | Rocky slopes, deserts, open woodlands, limestone soils. | Rocky hillsides, open oak woods, with mesquite. |
Elevation | 600–1400 m. (2000–4600 ft.) | 150–1600 m. (500–5200 ft.) |
Distribution |
AZ; NM; TX; Mexico (Chihuahua, Coahuila, Durango, Nuevo León, San Luis Potosí, Tamaulipas, Zacatecas, south as far as Oaxaca)
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TX; Mexico (Coahuila, Nuevo León, Tamaulipas) |
Discussion | Dalea greggii is cultivated as a ground cover and for erosion control in xeriscaping. In Texas, the species is known from the eastern trans-Pecos and Big Bend regions. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Dalea lasiathera is most abundant on the Edwards Plateau with outlying populations in the trans-Pecos region and Wichita County in the Red River valley. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Name authority | A. Gray: Pl. Nov. Thurb., 314. (1854) | A. Gray: Smithsonian Contr. Knowl. 3(5): 48. (1852) |
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