FNA: Dalea exserta vs. Dalea bartonii

	Dalea exserta	Dalea bartonii
	Mexican prairie clover	Warnock's prairie clover
Stems	ribbed, (1.5–)5–10(–12) dm, glandular-verrucose distally.	1.2–2.5 dm, gland-dotted.
Inflorescences	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.	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.
Peduncles	(1–)2.5–14 cm.	0.1–0.6 cm.
Stamens	8–10, (7.5–)8–11 mm, filaments distinct to 0.1–1.6 mm, anthers 0.4–0.5 mm.	5, 9.5 mm, filaments distinct to 4.5 mm, anthers unknown.
Corollas	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.	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.
Calyces	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.	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.
Legumes	2.2–2.8 mm, pilosulous distally and dotted with small glands.	2.8 mm, sparsely pubescent along abaxial side, densely so at base of style, gland-dotted.
Seeds	1.6–1.8(–2) mm.	2 mm.
Annual	herbs, erect, glabrous proximal to inflorescences.
Principal	leaves 3–10 cm; leaflets 19–37, blades oblong-elliptic to oblanceolate, 2–9 mm.	leaves 0.8–2(–2.3) cm; leaflets 5–9, blades obovate-cuneate, 2.5–7.5 mm.
Perennial		herbs, erect, glabrous proximal to inflorescences.
2n	= 14 (Mexico).

	Dalea exserta	Dalea bartonii
Phenology	Flowering fall–spring.	Flowering summer.
Habitat	Openings in woods, disturbed ground.	Limestone soils.
Elevation	1000–1200 m. (3300–3900 ft.)	1000–1100 m. (3300–3600 ft.)
Distribution	AZ; Mexico; Central America [BONAP county map]	TX [BONAP county map]
Discussion	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.)	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.)
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. 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. 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
Synonyms	Parosela exserta
Name authority	(Rydberg) Gentry: Publ. Carnegie Inst. Wash. 527: 138. (1942)	Barneby: Mem. New York Bot. Gard. 27: 239, plate 54. (1977) — (as bartoni)
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) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Dalea bartonii

Mexican prairie clover

Warnock's prairie clover

Stems

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

1.2–2.5 dm, gland-dotted.

Inflorescences

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.

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.

Peduncles

(1–)2.5–14 cm.

0.1–0.6 cm.

Stamens

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

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

Corollas

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.

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.

Calyces

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.

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.

Legumes

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

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

Seeds

1.6–1.8(–2) mm.

2 mm.

Annual

herbs, erect, glabrous proximal to inflorescences.

Principal

leaves 3–10 cm;

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

leaves 0.8–2(–2.3) cm;

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

Perennial

herbs, erect, glabrous proximal to inflorescences.

= 14 (Mexico).

Dalea exserta

Dalea bartonii

Phenology

Flowering fall–spring.

Flowering summer.

Habitat

Openings in woods, disturbed ground.

Limestone soils.

Elevation

1000–1200 m. (3300–3900 ft.)

1000–1100 m. (3300–3600 ft.)

Distribution

AZ; Mexico; Central America

[BONAP county map]

Discussion

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.)

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.)

Source

FNA vol. 11.

Parent taxa

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. 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. 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

Synonyms

Parosela exserta

Name authority

(Rydberg) Gentry: Publ. Carnegie Inst. Wash. 527: 138. (1942)

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

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 exserta

Dalea bartonii

Dalea exserta

Dalea bartonii