Flora of North America species comparison

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Dalea urceolata

Dalea exserta

pineforest prairie clover

Mexican prairie clover
Stems

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

(1–)2.5–14 cm.
Stamens

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

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

1.6–1.8(–2) mm.
Dalea

urceolata is remarkable for its reduced corolla with two epistemonous petals and is rare throughout most of its range.

Annual

herbs, erect, glabrous proximal to inflorescences.
Principal

leaves 3–10 cm;

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

= 14 (Mexico).

Dalea urceolata

Dalea exserta
Phenology Flowering fall–spring.
Habitat Openings in woods, disturbed ground.
Elevation 1000–1200 m. (3300–3900 ft.)
Distribution
from USDA
sw United States; Mexico
[BONAP county map]
from FNA
AZ; Mexico; Central America
[BONAP county map]
Discussion

Varieties 3 (1 in the flora).

Variety tripetala (Paul G. Wilson) Barneby occurs in south-central Mexico (Michoacán to Morelos) and has fewer stamens (5–7) than var. urceolata (7–10). Variety lucida (Rose ex Rydberg) Barneby occurs in Durango and lacks the epistemonous petals; the banner is the only petal.

(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. 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. 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
Subordinate taxa
D. urceolata var. urceolata
Synonyms Parosela exserta
Name authority Greene: Leafl. Bot. Observ. Crit. 1: 199. (1906) (Rydberg) Gentry: Publ. Carnegie Inst. Wash. 527: 138. (1942)
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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