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hairy prairie clover, silky dalea

Mexican prairie clover

Stems

1–3.5(–6.5) dm, glandular-tuberculate.

ribbed, (1.5–)5–10(–12) dm, glandular-verrucose distally.

Inflorescences

racemes, ± densely flowered, pedicels with black, prickleshaped glands at base and toward apex, not involucrate, 8–14 mm diam.;

axis not visible, (0.5–)1–3.5 cm;

bracts deciduous, (3–)4.5–8 mm.

spikes, relatively densely flowered, not involucrate, 13–16 mm diam.;

axis usually not visible, (1.5–)2–8 cm;

bracts deciduous by anthesis, (3–)4–8 mm.

Peduncles

0.2–2.5(–4.5) cm.

(1–)2.5–14 cm.

Stamens

10, 3.5–5.7 mm, filaments distinct to 2 mm, anthers 0.4–0.6 mm.

8–10, (7.5–)8–11 mm, filaments distinct to 0.1–1.6 mm, anthers 0.4–0.5 mm.

Corollas

whitish, banner and keel sometimes lilac-tinged; papilionaceous;

banner 3–4.2 mm, blades broadly triangular to suborbiculate-cordate, (1.5–)1.7–2.9 × 2.2–3.2 mm; epistemonous petals attached near or proximal to middle of stamen tube;

wings 2.1–3 × 1.1–1.4 mm;

keel detaching from stamen tube after anthesis, connate by overlapping margins, blades 2.3–3.4 × 1.4–2 mm.

white, sometimes banner purplish in age;

not conventionally papilionaceous;

banner 4.9–7.3 mm, blade lanceolate-oblong to oblong-elliptic, 3–4.8 × 2.2–2.3 mm; epistemonous petals attached near or proximal to middle of stamen tube, blades somewhat unequal, laterals (2–)3.4–5 × 1–1.8 mm, abaxials 3–3.7 × 1.1–1.6 mm.

Calyces

± symmetric, 3.3–6.6 mm, pilose;

tube 1.6–2.5 mm, with (1 or)2–6 glands between ribs, lobes triangular or triangular-aristate.

asymmetric, recessed opposite banner, 4.8–7 mm, glabrous;

tube (2.5–)2.7–3.8 mm, with 2–4(–8) large glands between ribs, lobes triangular-aristate.

Legumes

2.2–2.7 mm, pilosulous distally and dotted with small glands.

2.2–2.8 mm, pilosulous distally and dotted with small glands.

Seeds

1.8–2.2 mm.

1.6–1.8(–2) mm.

Annual

herbs, prostrate or decumbent, ± pilose or pilosulous.

herbs, erect, glabrous proximal to inflorescences.

Principal

leaves (0.5–)1–3.5 cm;

leaflets (7 or) 9–13 (or 15), blades obovate to obcordate, (2–)3–8 mm, margins ± entire or obscurely undulate.

leaves 3–10 cm;

leaflets 19–37, blades oblong-elliptic to oblanceolate, 2–9 mm.

2n

= 16 [Mexico].

= 14 (Mexico).

Dalea mollis

Dalea exserta

Phenology Flowering late winter–mid spring (fall–early winter). Flowering fall–spring.
Habitat Sandy or rocky desert slopes, flats, roadsides. Openings in woods, disturbed ground.
Elevation -50–700 m. (-200–2300 ft.) 1000–1200 m. (3300–3900 ft.)
Distribution
from FNA
AZ; CA; NV; Mexico (Baja California, Baja California Sur, Coahuila, Sonora)
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; Mexico; Central America
[BONAP county map]
Discussion

Some collectors assume that Dalea mollis is perennial; the season of bloom can be long in a good year, and individual plants can be robust. Most of the fall and early-winter plants are collected in early bloom; an occasional plant from that time-period is taken in late bloom. Dalea mollis is similar to D. mollissima and mixed collections are relatively common. In California, D. mollis is known from the desert regions in the southeastern part of the state.

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

The existence of Dalea exserta in the flora area rests on specimens collected in 1939 by Goodding in Sycamore Canyon, near Ruby in Santa Cruz County. Because it is an annual that often grows in disturbed ground, it may be found again there or at some other locality in southern Arizona.

(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
D. albiflora, D. aurea, D. bartonii, D. bicolor, D. brachystachys, D. cahaba, D. candida, D. carnea, D. carthagenensis, D. compacta, D. cylindriceps, D. emarginata, D. enneandra, D. exigua, D. exserta, D. feayi, D. filiformis, D. flavescens, D. foliosa, D. formosa, D. frutescens, D. gattingeri, D. grayi, D. greggii, D. hallii, D. jamesii, D. lachnostachys, D. lanata, D. laniceps, D. lasiathera, D. leporina, D. lumholtzii, D. mollissima, D. multiflora, D. nana, D. neomexicana, D. obovata, D. ornata, D. phleoides, D. pinnata, D. pogonathera, D. polygonoides, D. pringlei, D. pulchra, D. purpurea, D. reverchonii, D. sabinalis, D. scandens, D. scariosa, D. searlsiae, D. tentaculoides, D. tenuifolia, D. tenuis, D. urceolata, D. versicolor, D. villosa, D. wrightii
D. albiflora, D. aurea, D. bartonii, D. bicolor, D. brachystachys, D. cahaba, D. candida, D. carnea, D. carthagenensis, D. compacta, D. cylindriceps, D. emarginata, D. enneandra, D. exigua, D. feayi, D. filiformis, D. flavescens, D. foliosa, D. formosa, D. frutescens, D. gattingeri, D. grayi, D. greggii, D. hallii, D. jamesii, D. lachnostachys, D. lanata, D. laniceps, D. lasiathera, D. leporina, D. lumholtzii, D. mollis, D. mollissima, D. multiflora, D. nana, D. neomexicana, D. obovata, D. ornata, D. phleoides, D. pinnata, D. pogonathera, D. polygonoides, D. pringlei, D. pulchra, D. purpurea, D. reverchonii, D. sabinalis, D. scandens, D. scariosa, D. searlsiae, D. tentaculoides, D. tenuifolia, D. tenuis, D. urceolata, D. versicolor, D. villosa, D. wrightii
Synonyms Parosela exserta
Name authority Bentham: Pl. Hartw., 306. (1849) (Rydberg) Gentry: Publ. Carnegie Inst. Wash. 527: 138. (1942)
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