POTATO FA^MILY 755 



about 1.5 cm. broad; berrj^ yellow or greenish. Prairies and plains: 111. — S.C. — 

 .\riz. — S.D. Plain — Subniont. Jl-S. 



7. P. pumila Xutt. Stem 3-10 dm. liigh, obscurely angled, hirsute; leaf- 

 blades thick, acute at both ends, 5-10 cm. long, entire or sinuate; caljoc densely 

 hirsute, 4—5 cm. long; corolla j'ellow, w-ith brown center, 1.5-2 cm. broad. Prairies 

 and river vaUej-s: 111. — Ark. — Tex. — Colo. Plain — Submont. Aly-Jl. 



8. P. virginiana IMill. Stem 3-10 dm. high, erect, angular, more or less 

 hirsute; leaf -blades 3-6 cm. long, hirsutulous; cah-x hirsute or puberulent; corolla 

 1.5-2.5 cm. broad, sulphur-j-eUow, with purplish center; berry reddish. Prairies, 

 river valleys, and cultivated ground: X.Y. — Fla. — Tex. — Alont. Plain — Sub- 

 mont. Ap-0. 



9. P. heterophylla Xees. Stem 3-10 dm. high, erect or decumbent and 

 spreading, puberulent and villous, viscid; leaf-blades '.5-10 cm. long, visually 

 broadly cordate, acute or acuminate, thick, more or less sinuately toothed, 

 densely pubescent and very viscid; calj^x \Tscid- villous, in fruit ovoid, somewhat 

 angled" and sunken at the base; coroUa 1.5-2 cm. ■ndde, yellow, with purple cen- 

 ter; berrj^ 3-eliow. Cultivated ground, sandy or loose soU, etc.: N.B. — Fla. — 

 Tex.— Utah — Sask. Plain — Submont. Mj'-S. 



10. P. hederaefolia A. Gray. Stem erect, rarely decumbent, 3-5 dm. high, 

 finely viscid-pubescent; leaf-blades 3-5-ribbed, 3-5 cm. broad; calj'x finely 

 viscid-pubescent, in fruit ovoid, 5-10-angled, 2-3 cm. long, slightly sunken at 

 the base; corolla about 1.5 cm. wide. Rocky hills and dry plains: Tex. — Colo. 

 — Utah — s Calif. ; Mex. Son. Ap-Au. 



11. P. comata Rydb. Stem about 5 dm. high, finely short-pubescent and 

 viscid, with a few scattered long hairs on the upper part; leaf -blades 3-5 cm. long, 

 somewhat repand or entire, finely pubescent; calj-x finely pubescent and villous, 

 in fruit 3-4 cm. long, roimded-ovoid, scarceh* simken at the base; corolla greenish 

 yeUow, with brown center. Hillsides, cliffs, and dry plains: Xeb. — -Colo. — -Tex. 

 Plain — Submont. Jl-Au. 



12. P. rotufidata Rydb. Stem diffuse or spreading, dichotomously zigzag- 

 branched, densely and finely viscid-pubescent; leaf-blades ■^\'ith truncate or sub- 

 cordate base, 2-4 cm. broad, sinuate-dentate; fruiting cah^x ovoid, scarcely 

 angled, not simken at the base; corolla 1.5 cm. broad, greenish yellow, -n-ith 

 brownish center. Plains: S.D. — Tex. — X.M. — Colo. Plain. Jl-S. 



13. P. Fendleri A. Gray. Stem 3-6 dm. high, finely puberulent, somewhat 

 stellate, much branched; leaf -blades small, 1-4 cm. long, deltoid, lanceolate, 

 ovate or somewhat cordate, sinuately toothed; calyx somewhat stellate and 

 puberulent, in fruit rounded-ovoid, 2-3 cm. thick; coroUa yellow, -with brown 

 center; berrj' yellow. Drj' plains and rocky places: X.AI. — Colo. — Utah — Ariz.; 

 Mex. Submont. ]My-Au. 



2. QUINCULA Raf. 



Perennial scurfy-granuliferous perennials, ■with diffuse stems. Leaves 

 alternate, sinuately lobed or pinnatifid, somewhat fleshy. Peduncles com- 

 monh' in pairs from the axils of the leaves. Flowers perfect, regular, erect 

 diuing anthesis. Cah^x campanulate, accrescent and becoming bladder-like in 

 fruit, 5-angled, reticulate, with 5 converging lobes. Corolla flat, rotate, pen- 

 tagonal in outline, violet or purple. Anthers opening by longitudinal slits. 

 Seeds comparatively few, flattened, kidney-shaped, rugose-tuberculate. 



1. Q. lobata (Torr.) Raf. Stem low, spreading or prostrate; leaf-blades 

 oblanceolate or spatulate to oblong, sinuately lobed or more or less p'iimatifid, 

 with rounded lobes; cah'x in fruit sharplj- 5-angled, ovoid, simken at the base; 

 corolla purplish, 2-3 cm. broad. PhysalUs lobata Torr. High plains and bluffs: 

 Kans. — Tex. — ^Ariz.; ]Mex. Son. — Submont. Ap-Au. 



3. CHAMAESARACHA A. Gray. 



Scurfy perennial herbs. Leaves alternate, entire or pinnatifid, with winged 

 petioles. Peduncles soUtary or 2 or 3 in the axils of the leaves. CaljTC cam- 

 panulate, 5-lobed, only sHghtly accrescent, not becoming bladder-like in fruit, 



