Eureka Milkvetch

Xylophacos eurekensis (M. E. Jones) Rydb. Fl. Rocky Mts
504, 1063. 1917.
Astragalus glareosus M. E. Jones, Zoe 3: 291. 1893. Not A. glareosus Dougl. 1831. Astragalus eurekensis M. E. Jones, Contr. W. Bot. 8: 12. 1898.
A cespitose perennial, with a deep root; stems very short, covered with the remains of leafbases; leaves ascending, 5-15 cm. long; stipules lanceolate, 4-5 mm. long; leaflets 7-15, lanceolate-elliptic, 8-15 mm. long, 3-5 mm. wide, acute at each end, strigose-canescent; peduncles 5-12 cm. long, slender; racemes 2-7-flowered; bracts lanceolate, 3-6 mm. long; calyx silky-villous with black and white hairs, the tube 7-9 mm. long, the teeth subulate, 3-4 mm. long; corolla cream-white with purple-tipped keel, 2-2.5 mm. long; banner obovate, notched, slightly arcuate; wings shorter, the blades linear-oblong, nearly straight; keel-petals shorter and twice as broad, strongly arcuate and rounded at the tip; pod lanceolate in outline, 2-3 cm. long, 8 mm. thick, and 5 mm. wide, strongly arcuate at the middle, sulcate below, rather sparingly loosely silky-villous.
Type locality: Not given [presumably Eureka, Utah).
Distribution: Central Utah.

Perennial, Herbs, Stems woody below, or from woody crown or caudex, Taproot present, Nodules present, Stems very short, acaulescent or subacaulescent, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Leaves alternate, Leaves petiolate, Stipules conspicuous, Stipules membranous or chartaceous, Stipules persistent, Stipules free, Leaves compound, Leaves odd pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 5-9, Leaflets 10-many, Leaves hairy on one or both surfaces, Flowers in axillary clusters or few-floweredracemes, 2-6 flowers, Inflorescences racemes, Inflorescences globose heads, capitate or subcapitate, Inflorescence axillary, Bracts very small, absent or caducous, Flowers zygomorphic, Calyx 5-lobed, Calyx glabrous, Petals separate, Corolla papilionaceous, Petals clawed, Petals ochroleu cous, cream colored, Petals blue, lavander to purple, or violet, Banner petal narrow or oblanceolate, Wing petals narrow, oblanceolate to oblong, Wing tips obtuse or rounded, Keel petals auriculate, spurred, or gibbous, Keel tips obtuse or rounded, not beaked, Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Style persistent in fruit, Fruit a legume, Fruit stipitate, Fruit unilocular, Fruit humistrate, lying on the ground, Fruit tardily or weakly dehiscent, Fruit oblong or ellipsoidal, Fruit fleshy, Fruit coriaceous or becoming woody, Fruit exserted from calyx, Fruit beaked, Fruit hairy, Fruit 11-many seeded, Seeds cordiform, mit-shaped, notched at one end, Seed surface smooth, Seeds olive, brown, or black.