SOLANACEAE. 809 



rowed at the base, 0.7-2 dm. long; petioles longer than the peduncles; flowers 

 2.5-3.5 cm. long and broad; corolla-limb almost entire; fruiting calyx 2.5-3.5 cm. 

 long and thick, its segments acute, their basal auricles acute or cuspidate; berry 

 about 12 mm. in diameter, loosely surrounded by the calyx. In waste places, 

 escaped from gardens, N. S. to Ont., south to Fla. Adventive from Peru. July- 

 Sept. 



a. PHYSALIS L.* (See Appendix.) 

 Herbs, sometimes a little woody below, with entire or sinuately toothed leaves. 

 Peduncles slender, in ours solitary from the axils. Calyx campanulate, 5. toothed, 

 in fruit enlarged and bladdery-inflated, membranous, 5-angled, or prominently io, 

 ribbed and reticulate, wholly enclosing the pulpy berry. Corolla often with a 

 brownish or purplish center, open-campanulate, or rarely campanulate-rotate, 

 plicate. Stamens inserted near the base of the corolla; anthers oblong, opening 

 by longitudinal slits. Style slender, somewhat bent; stigma minutely 2-cleft. 

 Seeds numerous, kidney-shaped, flattened. [Greek, bladder, referring to the 

 inflated calyx.] The number of recognized species is about 50; 34 occur in the 

 U.S. 



♦Annuals with branched fibrous roots, 

 t Plants more or less pubescent (except P. Barbadensis obscura). 

 Fruiting calyx sharply 5-angled, more or less acuminate at the summit and sunken at the 

 base ; calyx-lobes (at flowering time) lanceolate or acuminate, as long as the tube 

 or longer. 

 Leaves ovate, oblique, acute or acuminate, subentire at the base; upper part repand 

 or subentire; fruiting calyx small and short; stem slender, diffuse, sharply angled. 



1. P. pubescens. 

 Leaves cordate, oblique, strongly sinuate to the base; stem stout, obtusely angled; 



fruiting calyx rounded. 2. P. pruinosa. 



Leaves cordate, scarcely oblique, more or less abruptly acuminate, acutely repand 

 dentate; stem tall, acutely angled; fruiting calyx larger, long-acuminate. 



3. P. Barbadensis. 

 Fruiting calyx obtusely or indistinctly 5-10-angled; calyx-lobes (at flowering time) trian- 

 gular, generally shorter than the tube. 4. p, Missouriensis. 

 t t Plants glabrous, or the upper part sparingly beset with short hairs, or a little puberu- 



lent when young ; fruiting calyx obtusely 5-10-angled, not sunken at the base. 

 Corolla yellow, sometimes with the center a little darker but never brown or purple. 



Peduncles generally much longer than the fruiting calyx ; leaves sinuatelv toothed or 



subentire. 5. p. pendula. 



Peduncles scarcely exceeding the fruiting calyx; leaves sharply dentate. 



6. P. angulata. 

 Corolla yellow, with a brown or purple center. 



Peduncles short, scarcely as long as the flowers, which are 10-20 mm. in diameter: 



calyx-lobes broadly triangular. 7. p, ixocarpa. 



Peduncles longer than the flowers, which are 16-25 m ni. in diameter; calyx-lobes 

 lanceolate-triangular. 8. P. Philadelphia. 



* * Perennial by rootstocks and roots. 

 f Pubescence not stellate (although in P. pumila of branched hairs). 

 Pubescence on the leaves none, on the upper part of the stem and the calyx sparse and 

 short, if any. 

 Fruiting calyx ovoid, nearly filled by the berry, scarcely sunken at the base. 



Leaves ovate-lanceolate to broadly ovate, usually thin. 8a. P. subglabrata. 



Leaves lanceolate, oblanceolate, or linear. 9. p, longi/olia. 



Fruiting calyx pyramidal, very much inflated and deeply sunken at the base ; leaves 

 broadly ovate, usually coarsely dentate. 10. P. macro plivsa- 



Pubescence sparse, consisting of flat, sometimes jointed, and in P. pumila branched hairs; 

 in P. Virginiana sometimes a little viscid. 

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

 obovate or spatulate to rhomboid, subentire. 

 Leaves obovate or spatulate ; hairs all simple. 11. P. lanceolata. 



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



12. P. pumila. 

 Fruiting calyx pyramidal, more or less 5-angled and deeply sunken at the base; 

 leaves ovate to lanceolate, generally more or less dentate. 13. P. Virginiana. 

 Pubescence dense, short, more or less viscid or glandular, often mixed with long flat 

 jointed hairs. 



* Contributed by Dr. P. A. Rydberg 



