478 FABACEAE 



let elliptic or oval; peduncles 1-3 cm. long; bracts ovate; calyx— teeth subulate, 

 about 3 mm. long, one-foin-th or one-third shorter than the whitish corolla. 

 Hosackia elata Nutt. Sandy soil: Wash. — Ida. — Ore. Son. — Submonl. Je-Jl. 



9. HOSACKIA Dougl. Bird's-foot. 



Perennial herbs, with leafy stems. Leaves alternate, regularly odd-pinnate, 

 with foliaceous stipules. Flowers perfect, in bracted several-flowered umbels or 

 heads. Calyx camjianulate ; lobes subequal. Banner broad, its claw remote 

 from the others; wings partially coherent to the very obtuse keel. Stamens 10, 

 diadelphous, the alternate filaments dilated below the anthers. Pods linear, 

 straight, or nearly so, 5-20-seeded, tardily dehiscent. 



1. H. bicolor Hook. Glabrous perennial; stem erect or decumbent at the 

 base, 2-4 dm. high; stipules ovate, more or less scarious; leaves pinnate; leaflets 

 5-9, obovate to elliptic, 1-2 cm. long, obtuse or acute; peduncles 4—10 cm. long, 

 3-7-flowered; bracts usually lacking; flowers sessile; calyx-tube 4 mm. long, the 

 lower three teeth subulate, 2 mm. long, the upper two lanceolate and more or 

 less united; corolla light yellow or the wings white; pod 6-8 cm. long, glabrous. 

 Lotus pinnatus Dougl. Wet places: B.C. — Ida. — Calif. Suhmont. Ap-Je. 



10. ANISOLOTUS Bernh. Deer-weed. 



Annuals or perennials, with leafy stems. Leaves alternate, pinnate, with an 

 even number (2-10) of leaflets, which, however, are rather irregularly arranged 

 on the rachis; stipules gland-like. Flowers solitary or in small umbels or heads, 

 on axillary peduncles. Cal)rx campanulate; teeth or lobes nearly equal. Petals 

 free from the staminal tube; banner ovate or rounded; wings oblong; keel acute 

 or rounded at the apex. Stamens 10, diadelphous, the alternating filaments 

 dilated above. Pod flat, linear, straight, dehiscent, mostly many-seeded. 



Animal; plant villous; flowers subsessile in the axils of the leaves. 1. A. hrachycarpus. 

 Perennials; plant appressed-pubescent ; flowers mostly several together, on a pedimcle 

 (except often in No. 2). 

 Leaflets closely crowded on the very short racliis, oblanceolate to linear; pedimcles 

 less than 5 cm. long; stem erect. 

 Inflorescence 1-2-flowered, iisually subsessile in the axils of the leaves; calyx-teeth 



equalling the tube. 2. A. Wrightii. 



Inflorescence 2-5-flowered, distinctly ped\mcled; calyx-teeth shorter than the 

 tube. 3. A. puberulus. 



Leaflets not crowded on the evident rachis; stem decumbent. 



Flowers about 1 cm. long; peduncles 1-2 cm. long; leaflets linear-oblong. 



4. A. nummularius. 

 Flowers 12-1.5 mm. long; pedimcles 4-10 cm. long. 



Leaflets linear to oblong; bracts longer than the calyx; pods divaricate or re- 

 flexed. 5. A. lonciebractealus. 

 Leaflets obovate or cimeate; bracts shorter than the calyx; pods erect or 

 ascending. 6. A. rigidus. 



1. A. brachycarpus (Benth.) Rydb. Stem decumbent or j)rostrate, dif- 

 fusely branched, 1-3 dm. long, densely villous; leaves about 2 cm. long, sub- 

 sessile; leaflets usually 4, oval, 6-10 mm. long, densely villous on both sides; 

 flowers solitary, sessile; calyx-lobes lance-subulate, about 4 mm. long; corolla 

 yellow, 7-8 mm. long; pod oblong, about 1 cm. long, villous, 2-3-seeded. Ho- 

 sackia brachycarpa Benth. Lotus humistratus Greene. Hills: s Utah — Ariz. — 

 Calif. Son. Mr-Jl. 



2. A. Wrightii (A. Gray) Rydb. Stems numerous, erect or ascending, 

 grayish strigose; leaflets 3-6, crowded, grayish strigose, linear or linear-oblong, 

 mostly acute, 1.5-2 cm. long; flowers usually subsessile in the axils of the leaves, 

 solitary or 2 or 3, sometimes on 1-3-flowered peduncles; bracts 1-foliolate, 

 linear; calyx-teeth subulate, 4 mm. long; corolla about 15 mm. long, yellow or 

 orange, turning red; pod linear, strigose, 2.5 cm. long. L. Wrightii Greene. 

 Hills: s Colo. — N.M.— Ariz. Son. — Suhmont. My-Au. 



3. A. puberulus (Benth.) Woot. & Standi. Stems erect, 2-3 dm. high, 

 strigose; leaves sessile; leaflets from si)atulate to linear, 7-15 mm. long, strigose; 

 peduncles 2-4 cm. long, 2-5-flowercd; bracts 1-3-foliolate; calyx-teeth subulate, 

 2-3 mm. long; corolla about 1 cm. long, light yellow, tinged with salmon or pink; 



