PEA FAMILY 529 



5-10 cm. long; racemes short, 3-5-flowered; corolla purple, 2.5-3 cm. long; pod 

 tlj-jr* ^''^' '''' prairies: Neb. -N.M.^ Ariz. Plam-Suhmont. 



16. L. Ijrachycalyx Rydb Stem simple or slightly branched, 1.5-3 dm. 

 high usually finely pubescent, sharply 4-angled; leaflets 2-5 pairs, linear-oblong 

 or oblanceolate firm strongly veined, finely pubescent, 1^3 cm. long, 2-8 mm 

 vvade; tendrils of the lower leaves reduced to mere tips; peduncles 5-10 cm. long; 

 raceme short 2^6-flow'ered ; corolla purple, 2-2.5 cm. long; pod glabrous, 3-4 cm 

 long. Mountains: Utah. Suhmont.—Mont. Je-Au. 



'\-J'h ^' °chrpleucus Hook. Stem 4-10 dm. high, terete, glabrous; leaflets 

 ttfil^' ^""T^^y oval or ovate, 2-5 cm. long, thin, glabrous, somewhat glaucous 

 J^Tl'k P^^^^^^'les 2-5 cm. long; racemes 5-10-flowered; corolla ochroleucous, 

 W,?-S l^^™™-/ong; pod about 4 cm. Jong, glabrous. Woods and river banks 

 Hudson Bay-<iue.—N.J.—Wyo.— B.C.— Mack. Plain— Submont. My-Au. 



To+ ^?\^' .^^etivirens Greene. Stem branched, climbing, 4-6 dm. high; leaf- 

 lets 6~b pairs, oval or ovate, obtuse and mucronate, light green and glabrous, 

 ^ ti cm long, 1-2.5 cm. wide; peduncles about 5 cm. long; raceme short, 3-6- 

 nowered^ corolla ochroleucous, about 2 cm. long; pod about 4 cm. long. Moun- 

 tams: l>o1o. Submont. — Mont. Je. 



r^^ ^b u* °^i*^**us (Torr.) White. Stem finely pubescent or glabrous, 2~A 

 am. mgh; leaflets 2-4 pairs, ovate or oval, 2-5 cm. long, obtuse or acute, thin; 

 coroUa white or nearly so, 15-20 mm. long; pod about 4 cm. long. L. nevkensil 

 b. Wats., m part. Mountains: Wash.— Ida.—Calif. Son. My-Je. 



le^fSJ; oil *®"^^^u^".? ^^^^- ?*^'" ^^''"* 2 ^™- ^^gh, angled, glabrous; 

 leanets 2-4 pairs, elliptic, vemy, glaucous, acute, mucronate, 1-3 cm. long, 3-10 



2-4-flowered; c 



MonL My-Jl. 



Open woods: Wyo. — N.M. 



9 3' 1 ^^^<>^ic"s Britton. Stem 2^ dm. high, glabrous; leaflets usuaUy 

 ^ pairs, glabrous or nearly so, narrowly linear, 3-8 cm. long, 2-10 mm wide- 

 peduncles 2-4 cm. long; racemes 2-3-flowered; corolla white, 10-15 mm lone' 

 Open woods: Colo.— N.M.— Ariz. Mont.-Subalp. My-Jl. ^' 



44. APIOS Moench. Gbound-nut. 



Twining vines, with large tuberous roots. Leaves alternate, pinnate with 

 smal stipules. Flowers perfect, in racemes. Upper two calyx-teeth united, 

 tne lateral ones very small, and the lowest one longer. Corolla red, purple or 

 orown; banner reflexed; keel elongate, spiraUy t\\'isted. Stamens diadelphous. 

 totyle glabrous. Pod elongate, curved, flattened. 



U ^' w ^F^°^ ^^-l MacMiU. Stem 3-20 dm. long; leaflets 5-9, ovate to 

 lanceolate, 3-10 cm. long, acute or acuminate; calyx-tube 2-4 mm. long; corolla 

 Dro\raish purple; banner with a broad blade, about 1 cm. long; pod linear 6-12 



cm. long. A. tuberosa Moench. Thickets: N.B.—FIa.— Tex.— Colo.— Minn 

 Plain — Submont. 



STROPHOSTYLES Ell. Wild Bean 



> 



Herbaceous vines, twimng or trailmg. Leaves alternate, pinnately 3-foHolate, 

 jntn stipules. Flowers perfect, in dense clusters on long axillary peduncles, 

 v^alyx subequally 5-toothed, or the upper two teeth partially united. CoroUa 

 White or purplish; banner with a broad blade; keel curved. Stamens diadelphous. 

 isiyle bearded, bent. Pod narrow, flat, straight or nearly so. Seeds truncate. 



1. S. pauciflora (Benth.) S. Wats. Annual; stem 3-10 dm. long; leaflets 

 linear to lanceolate, 1.5-3.5 cm. long, rarely sinuately lobed; pedtmcles longer 

 tftan the leaves; caly-a 1.5 mm. long; lobes subequal; corolla pale purple; p"'' 

 ^-3 cm. long, strigose. PhaseoliLS pauciflarm Benth. River banks: Minn 

 Ind.— La.— Tex.— Colo. Plain. 



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