FNA: Dalea bartonii vs. Dalea brachystachys

	Dalea bartonii	Dalea brachystachys
	Warnock's prairie clover
Stems	1.2–2.5 dm, gland-dotted.	(0.5–)1–3.5(–4) dm, eglandular or sparsely glandular-verruculose.
Inflorescences	spikes, ± densely flowered, not involucrate, 8 mm diam.; axis not visible, 0.3–1.4 cm; bracts early deciduous or proximal ones persistent, 2–3 mm.	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	0.1–0.6 cm.	1–7 cm.
Stamens	5, 9.5 mm, filaments distinct to 4.5 mm, anthers unknown.	(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	white; not conventionally papilionaceous; banner 5.4 mm, blade deltate-obcordate, 2.5 × 3 mm; epistemonous petals attached at separation of filaments, blades 3 × 1.5 mm.	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	somewhat asymmetric, slightly recessed opposite banner, 3.8–4.3 mm, glabrous; tube 2.8–3.5 mm, with 3–8+ blister glands between ribs, lobes triangular-subulate or adaxial pair triangular-acuminate.	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	2.8 mm, sparsely pubescent along abaxial side, densely so at base of style, gland-dotted.	2.3–2.6 mm, pilosulous and, sometimes, gland-dotted distally.
Seeds	2 mm.	1.4–1.7 mm.
Perennial	herbs, erect, glabrous proximal to inflorescences.
Principal	leaves 0.8–2(–2.3) cm; leaflets 5–9, blades obovate-cuneate, 2.5–7.5 mm.	leaves 0.8–2.5(–3) cm; leaflets (3 or)5–11, blades oblanceolate to linear-oblanceolate, 2–14(–16) mm.
Annual		herbs (monocarpic), erect or diffuse, glabrous proximal to inflorescences.
2n		= 14.

	Dalea bartonii	Dalea brachystachys
Phenology	Flowering summer.	Flowering late summer–fall (spring).
Habitat	Limestone soils.	Dry, open habitats in deserts, desert grasslands, open oak, juniper, or pine woodlands.
Elevation	1000–1100 m. (3300–3600 ft.)	1300–2500 m. (4300–8200 ft.)
Distribution	TX [BONAP county map]	AZ; NM; TX; Mexico (Chihuahua, Coahuila, Durango, Puebla, San Luis Potosí, Sonora, Tamaulipas, Zacatecas)
Discussion	Dalea bartonii is known only from the type locality in Brewster County, although a vegetative specimen from adjacent Terrell County was annotated as D. bartonii by B. L. Turner. Dalea bartonii was assigned by D. K. Wemple (1970) to D. sabinalis (as Petalostemon sabinalis), but R. C. Barneby (1977c) considered it closer to D. scariosa and could not readily accommodate it in his concept or either D. scariosa or D. sabinalis. The known specimens were collected in July but were in late flower and early fruit, indicating that the peak of bloom was earlier. (Discussion copyrighted by Flora of North America; reprinted with permission.)	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.	FNA vol. 11.
Parent taxa	Fabaceae > subfam. Faboideae > Dalea	Fabaceae > subfam. Faboideae > Dalea
Sibling taxa	D. albiflora, D. aurea, 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. 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	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	Barneby: Mem. New York Bot. Gard. 27: 239, plate 54. (1977) — (as bartoni)	A. Gray: Smithsonian Contr. Knowl. 5(6): 39. (1853)
Web links	WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	WildflowerSearch iNaturalist (observations) LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Dalea brachystachys

Warnock's prairie clover

Stems

1.2–2.5 dm, gland-dotted.

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

Inflorescences

spikes, ± densely flowered, not involucrate, 8 mm diam.;

axis not visible, 0.3–1.4 cm;

bracts early deciduous or proximal ones persistent, 2–3 mm.

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

0.1–0.6 cm.

1–7 cm.

Stamens

5, 9.5 mm, filaments distinct to 4.5 mm, anthers unknown.

(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

white;

not conventionally papilionaceous;

banner 5.4 mm, blade deltate-obcordate, 2.5 × 3 mm; epistemonous petals attached at separation of filaments, blades 3 × 1.5 mm.

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

somewhat asymmetric, slightly recessed opposite banner, 3.8–4.3 mm, glabrous;

tube 2.8–3.5 mm, with 3–8+ blister glands between ribs, lobes triangular-subulate or adaxial pair triangular-acuminate.

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

2.8 mm, sparsely pubescent along abaxial side, densely so at base of style, gland-dotted.

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

Seeds

2 mm.

1.4–1.7 mm.

Perennial

herbs, erect, glabrous proximal to inflorescences.

Principal

leaves 0.8–2(–2.3) cm;

leaflets 5–9, blades obovate-cuneate, 2.5–7.5 mm.

leaves 0.8–2.5(–3) cm;

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

Annual

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

= 14.

Dalea brachystachys

Phenology

Flowering summer.

Flowering late summer–fall (spring).

Habitat

Limestone soils.

Dry, open habitats in deserts, desert grasslands, open oak, juniper, or pine woodlands.

Elevation

1000–1100 m. (3300–3600 ft.)

1300–2500 m. (4300–8200 ft.)

Distribution

[BONAP county map]

AZ; NM; TX; Mexico (Chihuahua, Coahuila, Durango, Puebla, San Luis Potosí, Sonora, Tamaulipas, Zacatecas)

Discussion

Dalea bartonii is known only from the type locality in Brewster County, although a vegetative specimen from adjacent Terrell County was annotated as D. bartonii by B. L. Turner.

Dalea bartonii was assigned by D. K. Wemple (1970) to D. sabinalis (as Petalostemon sabinalis), but R. C. Barneby (1977c) considered it closer to D. scariosa and could not readily accommodate it in his concept or either D. scariosa or D. sabinalis. The known specimens were collected in July but were in late flower and early fruit, indicating that the peak of bloom was earlier.

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

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. 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. 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

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

Barneby: Mem. New York Bot. Gard. 27: 239, plate 54. (1977) — (as bartoni)

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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Dalea bartonii

Dalea brachystachys

Dalea bartonii

Dalea brachystachys