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oakwoods prairie clover

Habit Shrubs or subshrubs, relatively erect, glabrous or pilosulous.
Stems

2–7 dm, eglandular or glandular-verruculose distally.

Inflorescences

spikes, relatively densely flowered, not involucrate, 12–15 mm diam.;

axis usually not visible, 0.5–2 cm;

bracts deciduous, (2.5–)3–7.5 mm.

Peduncles

0–7(–10) cm.

Stamens

10, 7–10.5(–12) mm, filaments distinct to 1.8–3.2 mm, anthers 0.5–0.9 mm.

Corollas

bicolored, banner cream to pale yellow, reddish in age, epistemonous petals rose-pink to -purple or magenta; papilionaceous;

banner (4.8–)5–8.2 mm, blade deltate-cordate, (2.4–)2.8–4.6 × 2–5.2 mm; epistemonous petals attached proximal to middle of stamen tube;

wings (3.7–)4–6.5 × 1.7–3.3 mm;

keel connate valvately, blades (4–)4.4–7(–7.5) × 2.7–4.2 mm.

Calyces

somewhat asymmetric, sometimes slightly recessed opposite banner, 5.7–7 mm, densely pilose;

tube 2.4–2.8(–3) mm, with 3–6 blister glands between ribs, lobes triangular-aristate, spurred laterally near base, unequal, abaxial longest.

Legumes

2.4–2.9 mm, pilosulous and gland-dotted distally.

Seeds

1.6–2 mm.

Principal

leaves 1–4 cm;

leaflets 9–19, blades oblanceolate to elliptic or obovate, 1–7.7(–9) mm.

2n

= 14.

Dalea versicolor var. sessilis

Phenology Flowering spring, fall.
Habitat Rocky slopes, canyons, oak or pine woodlands, desert grasslands.
Elevation 900–2100 m. (3000–6900 ft.)
Distribution
from FNA
AZ; NM; Mexico (Chihuahua, Sinaloa, Sonora)
[BONAP county map]
Discussion

Variety sessilis occurs primarily in the southeastern quarter of Arizona and into southwestern New Mexico. An outlier population occurs in Mohave County in northwestern Arizona.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Dalea > Dalea versicolor
Synonyms D. wislizeni var. sessilis
Name authority (A. Gray) Barneby: Phytologia 26: 1. (1973)
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