482 FABACEAE 



12. P. cuspidata Pursh. Stems strigose or glabrate, erect, 4-6 dm. high, 

 with spreading branches; leaflets 5, 2-4 cm. long, obovate to elliptic, glabrate 

 above, grayish strigose beneath; spikes head-like, 2-5 cm. long; calj'x strigose, 

 enlarged in fruit; tube in flowers 4-5 mm. long, gibbous above; lobes ovate to 

 lanceolate-acuminate, the upper two united half their length, 4 mm. long, the 

 lower long-cuspidate, 6-9 mm.; corolla blue, 15-20 mm. long; pod strigose, about 

 8 mm. long, ovoid. Sandy soil, hillsides: Minn. — Ark. — Tex. — N.M. — Mont. 

 Plain. Ap-Jl. 



13. P. esculenta Pursh. Stem erect, 1-3 dm. high, hirsute; leaflets 5, 2-6 

 cm. long, obovate to oblong, glabrous above, strigose beneath; spike short and 

 dense, 2-8 cm. long; calyx-tube about 5 mm. long, gibbous above, lobes in anthe- 

 sis lanceolate, the upper four 6 mm. long, the lowest 8 mm.; corolla about 15 rnm. 

 long; body of the pod ovoid, 6 mm. long; beak 15 mm. long. Prairies and plains: 

 Sask.— Wis.— Mo.— Okla.— Mont. PlainSubmoni. My-Jl. 



14. P. hypogaea Nutt. Stem very short, strigose; leaflets 5-7, 2-5 cm. long, 

 linear or linear-lanceolate, glabrous or nearly so above, strigose beneath ; peduncles 

 1-5 cm. long, strigose; spike head-like; calyx-tube 4 mm. long, gibbous above; 

 upper 4 lobes lance-subulate, 5 mm. long, the lowest broadly-lanceolate, in 

 flowers 7-10 mm. long; corolla about 12 mm. long. Dry plains: Neb. — Tex. — 

 N.M. —Mont. Plain. Je. 



15. P. megalantha Woot. & Standi. Stem very short; leaflets 5-6, obo- 

 vate, 1-3 cm. long, densely white-strigose beneath, less densely so above; peduncles 

 1^ cm. long; raceme 2 cm. long; calyx-tube 5-6 mm. long, gibbous above; lobes 

 all subulate. Hills: n N.M.—w Colo.— e Utah. Son. Je. 



16. P. mephitica S. Wats. Stem very short; leaflets 5, obovate or spatu- 

 late, 1.5-2.5 cm. long, grayish strigose on both sides, rounded or retuse at the 

 apex; peduncles 1-5 cm. long, hirsute; spike head-like; calyx-tube .8 mm. long, 

 gibbous above; upper 4 lobes subulate, 6 mm. long, the lowest lanceolate, 8-10 

 mm. long; pod about 1 cm. long, with a straight beak. Arid regions: Ariz. — 

 s Utah. Son. My-Je. 



17. P. castorea S. Wats. Stem 1.5 dm. or less high, strigose-canescent; 

 leaflets 3-5, broadly obovate-cuneate, rounded or retuse at the apex, grayish 

 strigose on both sides; peduncles 2-5 cm. long, strigose; spike head-hke; calyx- 

 tube 3 mm. long, the upper 4 teeth subulate, 6-7 mm. long, the lowest 8-10 mm. 

 long; corolla about 1 cm. long; pod obovoid, 8 mm. long; beak about 1.5 cm. 

 long. Arid regions: s Utah — Ariz. — s Cahf. — Nev. Son. My. 



14. PAROSELA Cav. 

 Perennial or annual herbs or shrubby plants, with glandular-punctate foliage. 

 Leaves alternate, odd-pinnate, with small leaflets. Flowers perfect, in terminal 

 or lateral spikes. Calyx campanulate, its lobes nearly equal. Corolla white, 

 purple, or yellow; banner broad, long-clawed, auricledat the base; wings and keel 

 usually longer than the banner, their claws adnate to the staminal tube. Stamens 

 10 or 9, monadelphous; anthers alike. Pods usually included in the calyx, in- 

 dehiscent, 2-3-ovuled, but usually 1-seeded. [Dalea Willd.j 



Wing- and keel-petals inserted at the base of the staminal tube; pods exceeding the 

 calyx; shrubs. (Xylodalea.) , ^ ^ .v. ... 



Calvx-lobes shorter than the tube, the upper two much broader than the rest. 

 Leaflets 1-7, oblong or elliptic. 1- P- Frcmonln. 



Leaflets .5-11, linear or linear-oblanoeolate. 2. F. Johnsom. 



Calyx-lobes equalUng the tube, all lanceolate, nearly similar. .3. P. arnoena. 



Wing- and keel-petals adnate to or in.serted on the staminal tube, some distance from the 

 base; pod shorter than the calyx; mostly herbs, rarely shrubs (Eudalea). 

 Stem and leaves glabroiLs. , „ , 



Annual; spike dense, cyhndric. 4. P. alopecuroides. 



Perennial; spike either rather lax or few-flowered. 



Plant herbaceous; spike lax, elongate, several-flowered; bracts obovate, per- 

 sistent, enclosing the calyx. 5. P. enneandra. 

 Plant shrubby; spike head-like, 2-10-flowcred, very short; bracts ovate, de- 

 ciduous. 6. P.formosa. 

 Stem and leaves pubescent. , ., , ^ , . i, ,. 

 Calyx-lobes short, ovate, not subulate-tippcd; .spike lax; prostrate or decumbent 

 villous herbs. 7. P. lunula. 



