Flora of North America species comparison

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Dalea brachystachys
Stems

(0.5–)1–3.5(–4) dm, eglandular or sparsely glandular-verruculose.
Inflorescences

spikes, densely flowered, not obviously involucrate, 8–11 mm diam.;

axis not to partially visible, 0.3–1.6 cm;

bracts deciduous near anthesis, 2.5–6 mm.
Peduncles

1–7 cm.
Stamens

(9 or)10, 3.5–5.5 mm, filaments distinct to 1–1.4(–2) mm, anthers 0.3–0.5(–0.6) mm.
Corollas

clear yellow, pinkish or brownish in age; papilionaceous;

banner 2–3.4(–6) mm, blade deltate-ovate or cordate, 1–2 × 1–2 mm; epistemonous petals attached proximal to middle of stamen tube;

wings 1–2(–2.9) × 0.7–1.1(–1.8) mm;

keel connate valvately, blades 1.8–2.8(–3.8) × 1.3–2(–2.4) mm.
Calyces

subsymmetric, (3.5–)4.4–5.8(–6) mm, pilose;

tube 1.5–2.1 mm, with (0–)3 glands between ribs, lobes triangular-aristate.
Legumes

2.3–2.6 mm, pilosulous and, sometimes, gland-dotted distally.
Seeds

1.4–1.7 mm.
Annual

herbs (monocarpic), erect or diffuse, glabrous proximal to inflorescences.
Principal

leaves 0.8–2.5(–3) cm;

leaflets (3 or)5–11, blades oblanceolate to linear-oblanceolate, 2–14(–16) mm.
2n

= 14.

Dalea brachystachys
Phenology Flowering late summer–fall (spring).
Habitat Dry, open habitats in deserts, desert grasslands, open oak, juniper, or pine woodlands.
Elevation 1300–2500 m. (4300–8200 ft.)
Distribution
from FNA
AZ; NM; TX; Mexico (Chihuahua, Coahuila, Durango, Puebla, San Luis Potosí, Sonora, Tamaulipas, Zacatecas)
Discussion

Dalea brachystachys is found as far south as southeastern Puebla. In the flora area, it is most common in extreme southeastern Arizona and adjacent southwestern New Mexico, with scattered populations through much of both states. Unlike most annual Dalea species, it is rarely weedy.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 11.
Parent taxa Fabaceae > subfam. Faboideae > Dalea
Sibling taxa
D. albiflora, D. aurea, D. bartonii, D. bicolor, 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. 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 D. lemmonii
Name authority A. Gray: Smithsonian Contr. Knowl. 5(6): 39. (1853)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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