POTATO FAMILY 755 



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

 Ariz. — S.D. Plain — Submonl. Jl-S. 



7. P. pumila Nutt. Stem 3-10 dm. high, obscurely angled, hirsute; leaf- 

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

 hirsute, 4-5 cm. long; corolla yellow, with brown center, l.,5-2 cm. broad. Prairies 

 and river vallej's: 111. — Ark. — Tex. — Colo. Plain — Submonl. My-Jl. 



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

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

 1.5-2.5 cm. broad, sulphur-yellow, with purjjlish center; berry reddish. Prairies, 

 river valleys, and cultivated ground: N.Y. — Fla. — Tex. — Mont. Plain — Sub- 

 mont. Ap-0. 



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

 spreading, jiuberulent and villous, viscid; leaf -blades 5-10 cm. long, usually 

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

 densely pubescent and very viscid ; calyx viscid- villous, in fruit ovoid, somewhat 

 angled and sunken at the base; corolla 1.5-2 cm. wide, yellow, with purple cen- 

 ter; berry yellow. Cultivated ground, sandy or loose soil, etc.: N.B. — Fla. — 

 Tex. — Utah — Sask. Plain — Subniotit. My-S. 



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

 finely viscid-jmbescent; leaf-blades 3-5-ribbed, 3-5 cm. broad; calyx 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; calyx finely pubescent and villous, 

 in fruit 3-4 cm. long, rounded-ovoid, scarcely sunken at the base; corolla greenish 

 yellow, witli brown center. Hillsides, cliffs, and dry plains: Neb. — -Colo. — -Tex. 

 Plain — Subnwiit. Jl-Au. 



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

 branched, densely and finely viscid-pubescent; leaf -blades with truncate or sub- 

 cordate base, 2^ cm. broad, sinuate-dentate; fruiting calyx ovoid, scarcely 

 angled, not sunken at the base; corolla 1.5 cm. broad, greenish yellow, with 

 brownish center. Plains: S.D. — Tex. — N.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; corolla yellow, with brown 

 center; berry yellow. Drj^ plains and rocky places: N.M. — Colo. — Utah — ^Ariz.; 

 Mex. Subinont. My-Au. 



2. QUINCULA Raf. 



Perennial scurfy-granuliferous ]ierennials, with diffuse stems. Leaves 

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

 monly in i)airs from tlie axils of the leaves. Flowers perfect, regular, erect 

 during anthesis. Calyx campanulate, accrescent and becoming bladder-hke in 

 fruit, 5-angled, reticulate, with 5 converging lobes. Corolla fiat, 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.j Raf. Stem low, spreading or prostrate; leaf-blades 

 oblanceolate or si)atulate to oblong, sinuately lobed or more or less pinnatifid, 

 with rounded lobes; calyx in fruit sharply 5-angled, ovoid, sunken at the base; 

 corolla purplish, 2-3 cm. broad. Physalis lobata Torr. High jjlains and bluffs: 

 Kans. — Tex. — Ariz.; Mex. Son. — Siibniont. Ap-Au. 



3. CHAMAESARACHA A. Gray. 



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

 petioles. Peduncles solitary or 2 or 3 in the axils of the leaves. Calyx cam- 

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



