488 FABACEAE 



mm. loiig, corona purpiisn, or ocnroleucous tipped with purple, 10-12 mm. long- 



calyx-teeth triangular-subulate; legume ellipsoid, 2.5-3.5 cm. long, strigose, 



stipe about equalling the calyx. A. allochrous A. Gray. Hillsides: Ariz.— Ida. 

 bon. Ap-Je. 



6. P. Eastwoodiae (M. E. Jones) Rydb. Perennial, with a cespitose 

 woody caudex; stem about 1.5 dm. high, glabrous; leaflets about 21, narrowly 

 obianceolate or linear 4-10 mm. long; calyx-tube about 6 mm. long, glabrous: 

 corolla purple; stipe of the pod about 2 mm. long; body ovoid, 2 cm. long, gla- 

 brous, sulcate on the upper side. River valleys: Utah— Colo. Son. My. 



6. P. lutosa (M. E. Jones) Rydb. Perennial, with fleshy taproot, and 

 several scaly stolons; leaflets about 12 pairs, mostly folded, oval, 6 mm. long, 

 obtuse, strigose; flowers 1-4, in almost sessile axillary clusters; bracts hyaline; 

 coroUa white; fruit glabrous, sulcate on both sutures, but less so on the dorsal 

 one. A. Itdosus M. E. Jones. River bottoms: Utah. Son. My. 



7. P. longifolia (Pursh.) Nutt. Perennial, with horizontal rootstocks; 

 stem erect, 15-4 dm. high; leaves 5-15 cm. long, grayish canescent; leaflets 

 otten none, the terminal represented by the prolonged rachis or contiguous with 

 It, Slightly If at all flattened; the lateral ones if present 1-4, linear-filiform, 1-2.5 

 cm long; raceme few-flowered; calyx strigose; tube campanulate, 2 mm. long; 

 teeth subulate, 1 5 mm. long; pod ellipsoid, papery, 2-3 cm. long, 12-18 mm. 



XT a't'^^*.*^?'^' ^i?,^'"'^^^- A- Pictus filif alius A. Gva.y. Sandhills: S.D.— Ida. 

 — N.M.— Ariz. Plain— Son. My-Jl. 



1 *' ■?■ ^}^^^ ^' ^^^y- Perennial, with a horizontal rootstock; stems 1-2 dm. 

 long, slender, grayish strigose-canescent; leaves 3-8 cm. long; leaflets &-15, 

 linear, strigose-canescent, 5-20 mm. long; racemes 3-10-flowered; cah-x strigose, 

 with white or mixed white and black hairs; tube campanulate, 2 mm. long; 

 teetn subulate, 1.5 mm. long; corolla ochroleucous, 7 mm. long; pod elliptic, 

 mottled, 15-18 mm. long, 8 mm. wide, acute at both ends. A. ceramicus Sheld. 

 Dry sandy places: Colo.— N.M.— Utah. Son.—Submont. My. 



=fo ®' ^\ 5"^*? u ^^- ^^f^'^ '^^''^^- Perennial, with a persistent caudex; 

 stems d-5 dm. high, spaimgly strigose or glabrous; leaflets 7-13, narrowly hnear, 



Q 1 °^T' f ' \\^^!^.^ la^i calyx strigose, with black hairs; tube campanulate, 



^ni- long; teeth triangular, 1 mm. long; corolla white; pod 2-3 cm. long, 



mottled, ovoid, glabrous. A. CusickU A. Gray. Dry- gfound: Ida.-Ore! 



1 Q ?' I- r*^Pf^L^^- ^^^^ ^ydb. Perennial, with a cespitose caudex; stems 

 L-6 dm. high, glabrous; leaflets 11-17, oval or obovate to oblong, retuse, 7-12 

 mm long glabrous; raceme short, few-flowered; calyx glabrous, or with a few 

 scattered black hairs; tube campanulate, about 5 mm. long; teeth subulate, 3 

 ram long; corolla white, 15 mm. long; pod mottled, about 3 cm. long, ovoid, 

 short-acummate the upper suture nearly straight. A . artipes A. Gray. Moun- 

 tains: Colo.— Utah— Ariz. Submont.—Mont. Je. 



11. P. Hookeriana T. & G. Perennial, with a deep root and cespitose 

 caudex; stems cinereous, 1-2 dm. high, decumbent; leaflets 13-19, oblong, strigose- 

 canescent on both sides, 5-10 mm. long; racemes short, few-flowered; calyx-tube 

 d-4 mm. long more or less black hairy; teeth subulate, 2 mm. long; corolla 

 ochroleucous, 8-10 mm long; pod obovoid, 2-3 cm. long, mottled, glabrous; 



lXot°-M^^y;-JI:^ "'^"- ^'"'^ ^^^ "^^^^ Ore.-Ida.-Nev.-Colo. 



hrrl% ^' "1%^^^^^ ^^tt- Subacaulescent, cespitose perennial; leaflets 9-13, 

 broaxlly oval, 8-12 mm. long, sparmgly strigiUose, in age glabrate, rounded or 

 retuse at the apex; racemes 3-6-flowered, calyx sparinglj strigiUose with black 

 hairs, 8 mm long; teeth lanceolate, 3 mm. long; corolla ochroleucous, about 2 

 r^nn.^' filTA «|o'iSate-ovoid, 1.5-2 cm. broad, papery, glabrous. A. 

 sTmZf ^''^' "" ' """"^ ^'^ *^^^^^- Wyof-Utah. Sm.- 



^a' ■^u-^*^*?V^^- ^i^^i ^7^^- Perennial, with a cespitose caudex; stems 

 dm. high, glabrous, leafy; leaflets 9-17, oblong, obtuse or retuse. 6-12 mm. 



'*:3. 



