Dalea greggii

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. Principal leaves 0.6–2.5(–3) cm; leaflets 5–9, blades obovate to oblanceolate, 2–7(–9) mm. Peduncles 0–4(–6) cm. 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. 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. 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. Stamens 10, 5.5–7.5 mm, filaments distinct to 1.7–2.4 mm, anthers 0.5–0.7 mm. Legumes 2.1–2.8 mm, pilosulous and gland-dotted distally. Seeds 1.6–2 mm. 2n = 14 (Mexico).

Phenology: Flowering spring, fall, (year-round).
Habitat: Rocky slopes, deserts, open woodlands, limestone soils.
Elevation: 600–1400 m.

Distribution

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Ariz., N.Mex., Tex., Mexico (Chihuahua, Coahuila, Durango, Nuevo León, San Luis Potosí, Tamaulipas, Zacatecas, south as far as Oaxaca).

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.

Selected References

None.

Lower Taxa

None.