PEA F-AJSIILY 513 



hairs; tube about 3 mm. long: teeth 1-2 m^m. long, subulate; corolla 8-10 mm. 

 long, dark purple; pod lance-oblong, sUghtly stipitate, about 15 mm. long, black- 

 hain', with a round ridge on each side. A. Bourgovii. A. Grav. ^lountains: 

 Alta'.—S.D.— Mont.— B.C. Submord.—Mont. Jl-Au. 



22. H. campestris Xutt. Stems often single, 2—4 dm. high, branched; 

 rachis of the leaves 5-10 cm. long, sometimes broadened at the end into a narrowh^ 

 oblanceolate blade, but usiiaUy long-att-enuate ; lateral leaflets of the lower leaves 

 narrowly hnear or Unear-subulate, 5-30 mm. long, those of the upper leaves 

 usually lacking; raceme lax, 3-10-flowered; cah-x-tube 3 mm. long: teeth 1 mm. 

 long; corolla about 1 cm. long: pod about 3 cm. long. 3—1 mm. wide, strigose. 

 A. campestris A. Gray. A. convallarius Greene. Sandy plains and bench-land: 

 Wyo. — Colo. — Utah. Plain — Submont. Je. 



23. H. juncif orrais iX. Xels.) R3'db. Stems several, 2— t dm. high, branched; 

 leaves either reduced to a naked slender ra^'his, 4-7 cm. long, or bearing 5-7 

 distant linear-oblong or linear leaflets, ^15 mm. long; raceme lax, 3-10-flowered; 

 cah'x-tube 3 mm. long; teeth triangular, 0.5 mm. long; coroUa about 1 cm. long; 

 pod about 3 cm. long, strigose. A. junciformis A. Xels. Sandy or stony 

 plains: Wyo. Submont. Je. 



24. H. junceus Xutt. Stems single or few, 3-6 dm. high, canescent-stri- 

 gose, branched; lower leaves •with 3-5, narrowly linear or oblanceolate-linear 

 leaflets 1-3 cm. long, the upper usually reduced to the long slender rachis, curved 

 at the tip; racemes 3-10-flowered, lax; cah'x-tube 3 mm. long; teeth triangular, 



1 mm. long or less; pod strigose, hnear, 2.5-3 cm. long, 4 mm. wide. A. junceus 

 A. Gray. .4. diversifoHus A. Gray. Sandj' plains: Mont. — Wj-o. — (? Colo.) — 

 Ariz. — Ida. Plain. — Submont. Je-Jl. 



25. H. decumbens Xutt. Stems decumbent, 1-2 dm. high, sparingly 

 strigose or glabrate; leaflets 7-11, narrowly linear-lanceolate, 5-10 mm. long, 

 about 1 mm. wide, strigose on both sides; raceme short, but loose, .5-10-flowered; 

 cah'x-tube about 2 mm. long; teeth subulate, scarcely 1 mm. long; coroUa ochro- 

 leucous, tipped with purple; pod linear, arcuate, 2-2.5 cm. long, 3 mm. wide, 

 finelv strigillose. A. decumbens A. Grav. Sandy plains: Wvo. — iSIont. — Wash. 



j^.n. 



26. H. strigosus (Coult. & Fish.j Rydb. Stems decumbent or ascending, 

 1..5-3.5 dm. high, strigose; leaflets 13-21, narrowly linear or linear, 1-2 cm. long, 

 strigose on both sides; raceme slender, lax, 10-20-flowered; calj'x-tube 2.5 mm. 

 long; teeth subulate, of the same length; corolla 1 cm. long; pod sessile, linear, 

 about 2 cm. long, 3-3.5 mm. broad, strigose. A. strigosus Coult. <fc Fish. A. 

 griseopubescens Sheld. Dr^' ground: Mont. — Wash. Plain — Submont. Je-Jl. 



27. H. tenuifolius Xutt. Stems decumbent, less than 2 dm. high, stri- 

 gose- canescent; leaflets 7-13, linear or subulate, 5-15 mm. long, about 1 mm. 

 wide, strigose-canescent on both sides; raceme short, lax, 3-8-flowered; cah-x-tube 

 campan\ilate, about 2 mm . long; teeth 0.5-0.7 mm. long; corolla 6-8 mm. long; 

 pod Linear, strigose, 12-15 mm. long, 2.5-3 mm. •wide. A. campestris Coult. & 

 Xels., not A. Grav. Drv hills and mountains: Mont. — Colo. — Utah. Submonl. 

 —Mont. Je-Jl. * 



28. H. divergens (Blankinship) Rydb. Stems nimierotis, 1-1.5 dm. (rarely 



2 dm.^ high, grayish strigose, decumbent; leaflets 9-15, canescent-strigose, hnear 

 to lance-oblong, 4—S mm. long, 1-2.5 mm. •wide; racemes 6-15-flowered; cah-x 

 strigose •with dark hairs; tube scarcely 2 mm. long; teeth subulate, fully 1 mm. 

 long; coroUa 6 mm. long, white, purple-tinged, •with purple veins and purple- 

 tipped keel; jwd linear, 12-15 mm. long, 2-2.5 mm. -wide. A. divergens Blank- 

 inship. Hotnaiobus camporum Rydb., in part. Dr\- hills and mountain tops: 

 Mont. — Wyo. — Utah. Plain — Mont. 



29. H. serotinus (A. Gray) Rydb. Stems ascending or erect, slender, 2-4 

 dm. high, strigose; leaflets 9-21, linear to lance-oblong, acute, glabrous above, 

 strigose beneath, 1-3 cm. long, 2—4 mm. •wide; racemes lax, .5-15-flowered; cah'x- 

 tube about 2.5 mm. long; teeth subulate, less than 1 mm. long; corolla purphsh, 



