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Dalea bartonii
Dalea bartonii Barneby
Warnock's Prairie Clover, Cox's Dalea
Fabaceae (Pea family)
Synonym(s):
USDA Symbol: DABA2
USDA Native Status: L48 (N)
"Short, slender, almost always monocephalous stems less than 2.5 dm long." (webref: 28). "Dwarf, tufted perennial herbs from stout woody roots and a greatly enlarged, knotty caudex up to 3 cm diam, glabrous to the ciliolate oriflce of the calyx, the many slender, striate dotted but not tuberculate, simple or occasionally weakly spurred stems 1.2-2.5 dm long, by anthesis leafless at base, but thence equably leafy up to the usually solitary (rarely 2-3) terminal headlike spikes." (bibref: 1812).
Plant Characteristics
Duration: PerennialHabit: Herb
Leaf Arrangement: Alternate
Fruit Type: Legume
Size Notes: To about 11 inches in height.
Leaf: "The foliage pallid or yellowish green, the thick-textured leaflets smooth above, multipunctate beneath; leaf-spurs 0-0.4 mm long; stipules triangular-subulate 0.2-1.2 mm long, early becoming brown and deciduous; intrapetlolular glands small, immersed; post-petiolular glands small or 0; leaves petioled, the primary cauline ones 8-20 (23) mm long, with narrowly green-margined, ventrally grooved rachis and 5-9 oblanceolate to obovate-cuneate, emarginate, folded and backwardly arched leaflets 2.5-7.5 mm long, the terminal leaflet either sessile or minutely stalked, the uppermost leaves like those of some axillary branchlets often smaller and 3-foliolate." (bibref: 1812).
Flower: "Spike... a subsessile, capitate or shortly oblong head of 5-30 flowers." (webref: 28). "Peduncles 1-6 mm long; spikes shortly 5-30-flowered, subglobose to shortly oblong, without petals about 8 mm diam, the calyces spreading-ascending, the axis becoming 3-14 mm long; bracts dimorphic, the lowest persistent, ovate, about 2 mm long, the (little known) interfloral ones early deciduous, papery-castaneous except for narrow membranous margins near base, up to 3 mm long; spicular bracteoles 0.2-0.5 mm long; calyx obliquely obovoid-pyriform, 3.8-4.3 mm long, glabrous externally, at base broadly obconic, gray-glaucescent, and (dry) more or less pleated, thence castaneous and charged between the slender, immersed ribs with prominent yellow glands, these more or less 1-seriate in the narrower panels, numerous and scattered in the broad adaxial ones, the tube 2.8-3.5 mm long, strongly oblique at oriflce, the sinus behind banner shallowly recessed but much broader than the rest, the 3 abaxial teeth narrowly triangular-subulate, 0.7-1 mm long, the ventral pair shorter, broadly deltate, all densely ciliolate and internally pilosulous with silvery hairs up to about 0.2 mm long; petals white, glandless, the epistemonous ones perched at separadon of the filaments; banner about 5.4 mm long, the filiform claw 3 mm, the deltate-obcordate, distally hooded blade 2.5 mm long, 3 mm wide; epistemonous petals all similar (the abaxial pair slightly larger), about 3.7 mm long, the obovate blades about 3 mm long, 1.5 mm wide, cuneately narrowed at base into a claw less than 1 mm long; androecium 9.5 mm long, the column 4 mm, the free filaments up to 4.5 mm long (anthers not seen); pod half-obovoid, about 2.8 mm long, the ventral suture nearly straight, the dorsal one strongly convex and slenderly keeled along the prow, the valves membranous but heavily castaneous-flecked in lower 1/3, thence firm, thinly and minutely appressed-pilosulous along the abaxial curve, densely short-barbate at apex and along base of style." (bibref: 1812).
Fruit: "Seed nearly 2 mm long." (bibref: 1812).
Bloom Information
Bloom Color: WhiteBloom Time: Jul
Bloom Notes: "Petals white." (bibref: 1812).
Distribution
USA: TXNative Distribution: Endemic to Hell's Half Acre area of Brewster County, Texas. (webref: 28).
Native Habitat: "A shortgrass, semi-desert grassland with scattered pinyon and juniper in gravelly soils on limestone hills. The elevation is about 1100 m."(webref: 28).
Bibliography
Bibref 1812 - Daleae imagines : an illustrated revision of Errazurizia Philippi, Psorothamnus Rydberg, Marina Leibmann, and Dalea Lucanus emend. Barneby, including all species of Leguminosae tribe Amorpheae Borissova ever referred to Dalea (1977) Barneby, Rupert C.Search More Titles in Bibliography
Additional resources
USDA: Find Dalea bartonii in USDA PlantsFNA: Find Dalea bartonii in the Flora of North America (if available)
Google: Search Google for Dalea bartonii
Metadata
Record Modified: 2021-03-03Research By: Joseph A. Marcus