754 SOLANACEAE 



10-ribbed. Corolla yellow or whitish, campanulate or funnelform, often with a 

 darker, brownish or purplish center, plicate in the bud. Stamens adnate to the 

 base of the corolla; anther-sacs opening by longitudinal slits. Stigma minute. 

 Seeds numerous, kidney-shaped, flattened, finely pitted. 



Annuals, with branching roots; fruiting calyx cordate-ovoid, acuminate, strongly 5-angled. 

 Leaves very oblique, cordate, sinuate-dentate; fruiting calyx ovoid. 



1. P. pruinosa. 



Leaves orbicular or broadly ov\te, sinuately crenate, scarcely cordate and scarcely 

 oblique at the base. 2. P. neomexicana. 



Perennials, with horizontal rootstocks or rarely with woody caudices. 



Pubescence if any not stellate, although in P. pumila with some branched hairs. 

 Leaves and stem glabrous or the veins of the former and the upper part of the 



latter with scattered appressed hairs. 



Leaves ovate, ovate-lanceolate, or oval. 3. P. subglabrata. 



Leaves lanceolate, oblanceolate, or linear. 4. P. longifolia. 



Leaves and stem more or less pubescent with spreading hairs. 



Pubescence sparse, consisting of flat, sometimes jointed hairs, scarcely viscid. 

 Fruiting calyx ovoid, scarcely angled and scarcely sunken at the base; 



leaves thick, oblanceolate or spatulate to rhombic, subentire. 

 Leaves oblanceolate or spatulate; hairs all simple. 



Pubescence very short; leaves narrowly oblanceolate. 



5. P. polyphylla. 



Pubescence long; leaves spatulate. 6. P. lanceolata. 



Leaves broader, often rhombic; hairs on the lower surface branched. 



7. P. pumila. 

 Fruiting calyx pyramidal-ovoid, obtusely 5-angled and deeply sunken at 



the base; leaves ovate to lanceolate, generally more or less toothed. 



8. P. virginiana. 

 Pubescence dense, viscid, partly of fine and short, partly of long flat, jointed 



hairs. 



Leaves large; blades over 5 cm. long, more or less cordate; long flat hairs 

 numerous. 9. P. heterophylla. 



Leaves smaJer; blades less than 5 cm. long; long flat hairs few, mostly 



confined to the calyx. 

 Plant erect or ascending. 



Leaf-blades reniform or rounded-cordate, coarselj -sinuately toothed. 



10. P. hederaefolia. 



Leaf-blades rounded-ovate or rhombic. 11. P. comata. 



Plant prostrate, diffuse; leaf-blades nearly orbicular. 12. P. rotundata. 

 Pubescence fine, grayish, at least in part stellate. 13. P. Fendleri. 



1. P. pruinosa L. Stem stout, finely villous and somewhat viscid, erect or 

 spreading, 3-6 dm. high; leaf-blades 3-10 cm. long, finely pubescent, sinuately 

 toothed; calyx viscid, in fruit 2-3 cm. long, sunken at the base; corolla 3-8 mm. 

 in diameter; berry yellow or green. Cultivated ground and waste places: Mass. 

 Fla. Tenn. la.; adv. in Colo. Plain. Jl-S. 



2. P. neomexicana Rydb. Stem stout, obtusely angled, finely pubescent 

 and slightly viscid, 3-6 dm. high, erect; leaf-blades 3-5 cm. long, rounded or 

 truncate, finely pubescent; calyx finely pubescent, sharply angled, deeply sunken 

 at the base; teeth lanceolate, acuminate. Loose soil: N.M. Colo. L. Calif. 

 Son. Je-Au. 



3. P. subglabrata Mack. & Bush. Stem 3-9 dm. high; leaf-blades 3-7 cm. 

 long, entire or undulate, glabrous or very sparingly strigose; calyx strigose, in 

 fruit ovoid, reticulate, 2.5-3 cm. long; corolla yellow, with darker center, 1-1.5 

 cm. broad. River valleys, sandy or cultivated ground: Ont. Pa. Ark. Colo. 



Ida. Plain Submont. Je-S. 



4. P. longifolia Nutt. Stem tall, 5-10 dm. high; leaf -blades entire-margined 

 or somewhat repand; calyx glabrous or nearly so, in fruit ovoid, about 3 cm. long; 

 corolla 1-2 cm. broad, yellow, with brownish center; berry yellow, the lower 

 portion and the stipe glutinous. River valleys and rich soil: la. Ark. Ariz. 

 Mont.; Mex. Plain Submont. My-Au. 



5. P. polyphylla Greene. Stem erect, branched, 1.5-2.5 dm. high, angular, 

 scabrous-puberulent ; leaf -blades 2-4 cm. long, entire, scabrous-puberulent on 

 the margins and veins; calyx sparingly puberulent, in fruit 2 cm. thick; corolla 

 greenish yellow, with greenish center. Plains: Colo. Plain Submont. Jl. 



6. P. lanceolata Michx. Stem 3-6 dm. high, erect or spreading, sparingly 

 hirsute; leaf-blades acute or obtuse, entire or rarely wavy, thickish, sparingly 

 short-hirsute; calyx hirsute or strigose; corolla dull-yellow, with brownish center, 



