PAPILIONACEAE. 547 



Flowers pink or purple. 



Leaflets 3-5 ; calyx silky-pubescent. 



Bracts glabrous; leaflets mucronulate. 5. K, purpurea. 



Bracts silky pubescent ; leaflets obtuse. 6. K. tenuifolia. 



Leaflets 13-31 ; calyx glabrous. 7- K.foliosa. 



Foliage silky-pubescent ; leaflets 9-17. 8. K.villosa. 



1. Kuhnistera compacta (Spreng.) Kuntze. DENSE-FLOWERED PRAIRIE- 

 CLOVER. (I. F. f. 2108.) Erect, 3-8 dm. high. Leaflets 5-7, short-stalked, 

 oblong-lanceolate or linear-oblong, 13-25 mm. long; peduncles elongated, not 

 bracted; spikes 4-15 cm. long, about 13 mm. thick, the rachis pubescent ; flowers 

 about 4 mm. long; bracts awn-pointed, longer than the calyx; wings and keel-petals 

 oblong; standard cordate; pod pubescent, enclosed by the calyx. In dry soil, S. 

 Dak. to Kans., Colo, and Wyo. July- Aug. 



2. Kuhnistera Candida (Willd.) Kuntze. WHITE PRAIRIE-CLOVER. (I. F. f. 

 2109.) Stems 3-6 dm. high. Leaves petioled; leaflets 5-9, oblong or oblanceo- 

 late, 17-25 mm. long, often mucronulate, narrowed at the base, very short- stalked ; 

 peduncles elongated, bracted; spikes 2.5-10 cm. long, 11-13 mm - thick; bracts 

 awn-pointed, longer than the calyx; corolla 4-6 mm. long; wings and keel-petals 

 oval; standard cordate; calyx -teeth and pod slightly pubescent. Prairies, Ind. to 

 Minn., the N. W. Terr., La., Tex. and Colo. July-Aug. 



3. Kuhnistera oligophylla (Torn) Heller. SLENDER WHITE PRAIRIE- 

 CLOVER. (I. F. f. 2 1 10.) Slender, 3-7 dm. tall, the branches ascending. Leaves 

 short-petioled; leaflets about 7 (5-9), linear, linear-oblong or somewhat oblanceo- 

 late, firm, 2-4 mm. wide, mostly less than 2 cm. long, or those of the lower leaves 

 larger; spikes oblong or short cylindric, blunt, less densely flowered than those of 

 the preceding; bracts lanceolate, acuminate, equalling the calyx, or longer, early 

 deciduous; calyx-teeth usually pubescent. Plains, S. Dak. to Wyo., Tex., Ariz, 

 and Mex. June-Sept. 



4. Kuhnistera muitiflora (Nutt.) Heller. ROUND-HEADED PRAIRIE-CLOVER. 

 (I. F. f. 21 n.) Erect, 3-6 dm. high. Leaves short petioled; leaflets 3-9, linear 

 or oblanceolate, obtuse or obtusish at the apex, cuneate or narrowed at the base, short- 

 stalked, 9-13 mm. long, 0.5-1 mm. wide, peduncles elongated; heads globose, 9-13 

 mm. in diameter; bracts subulate, shorter than the calyx; calyx-teeth slightly pubes- 

 cent; corolla about 4 mm. long; wings and keel-petals ovate, oval or slightly 

 cordate. Plains, Kans. to Tex. Summer. 



5. Kuhnistera purpurea (Vent.) MacM. VIOLET PRAIRIE-CLOVER. (I. F. f. 

 2 1 12.) Glabrous or slightly pubescent, 4-9 dm. high. Leaves short-petioled; 

 leaflets 3-5, narrowly linear, 6-19 mm. long, narrowed at the base, very short- 

 stalked; spikes peduncled, oblong or cylindric, 1.3-5 cm - l n g> about I cm. thick; 

 bracts obovate, mucronate, nearly glabrous, equalling the silky-pubescentcalyx, or 

 shorter; corolla about 4 mm. long; standard cordate; wings and keel-petals ob- 

 long. Prairies, Ind. to the N. W. Terr., Tex. and Colo. July-Aug. 



6. Kuhnistera tenuifolia (A. Gray) Kuntze. SILKY PRAIRIE-CLOVER. 

 (I. F. f. 2113.) More or less pubescent, erect, branching, 3-6 dm. high. Leaves 

 short-petioled; leaflets 3-5, linear, somewhat involute, dotted with sessile glands, 

 6-25 mm. long, very short-stalked or sessile; peduncles terminal, elongated, 

 bracted; spikes oblong or cylindric, 1.2-4 cm - l n g? about II mm. thick, the rachis 

 pubescent; flowers rose-purple, about 5 mm. long; bracts ovate, aristate, silky- 

 pubescent, slightly exceeding the very silky-pubescent calyx; standard nearly or- 

 bicular, cordate, cucullate. In dry soil, Kans. and Ark. to N. Mex. July-Aug. 



7. Kuhnistera foliosa (A. Gray) Kuntze. LEAFY PRAIRIE-CLOVER. (I. F. f. 

 2114.) Erect, branching, or sometimes simple, glabrous, 3-9 dm. high. Leaves 

 numerous, petioled; leaflets 13-31, close together, short-stalked, linear-oblong or 

 slightly oblanceolate, 9-15 mm. long, acute or obtuse, mucronate at the apex, 

 narrowed at the base; spikes terminal, long-ovoid or cylindric, 2.5-5 cm - l n g 

 11-13 mm - thick, densely flowered; peduncles short; bracts lanceolate, awn- 

 pointed, longer than the calyx; flowers rose purple, about 4 mm. long; standard 

 broad, nearly orbicular; wings and keel-petals oval; calyx-teeth finely ciliate. 

 Along rivers, 111. and Ky. July Aug. 



8 Kuhnistera villosa (Nutt.) Kuntze. HAIRY PRAIRIE-CLOVER. (I. F. f. 

 2115.) Ascending or decumbent, 3-6 dm. high. Leaves short-petioled or nearly 



