POTATO FAMILY 115 



Physalis Linne 1753 Ground Cherry 



(Gr. physalis, bubble, from the inflated calyx) 



PI. 20, fig. 15. 



Sepals 5, united into a bell-shaped calyx, enlarged and bladdery- 

 inflated in fruit, membranous, 5-angled or prominently 10-ribbed and netted- 

 veined, wholly enclosing the pulpy berry, petals 5, yellowish or whitish, 

 often with a darker brownish or purplish center, united into an open bell- 

 shaped or rarely saucer-shaped corolla, stamens 5, inserted near the base 

 of the corolla, ovary with 2 cavities, style slender, stigma minutely 2-cleft, 

 fruit a berry; flowers solitary; leaves entire or wavy-toothed; annual or 

 perennial. 



1. Perennial, as shown by underground stems and 



buds ' : 



a. Leaves sticky-hairy P. heterophylla 



b. Leaves smooth or hairy, but not sticky 



(1) Leaves smooth P. longifolia 



2) Leaves hairy 



(a) Hairs simple, not branched or star- 



shaped 

 x. Fruiting calyx pyramidal, 5-angled and 



base deeply sunken P. virginidna 



y. Fruiting calyx ovoid, scarcely angled or 



sunken at base P. lanceolata 



(b) Hairs branched or star-shaped 



x. Hairs branched on the lower surface P. piimila 

 y. Hairs star-shaped P. Fendleri 



2. Annual ; fruiting calyx sharply 5-angled ; hairy 



or sticky P. pruinosa 



Quincula Rafinesque 1832 Purple Ground-cherry 



(Name unexplained, probably from quinque, five) 



PI. 19, fig. 1. 



Sepals 5, united into a saucer-shaped calyx inflated in fruit, sharply 

 5-angled and netted-veined, enclosing the fruit, petals 5, purplish or 

 violet, united into a flat corolla, 5-sided in outline, veiny, stamens 5, 

 ovary with 2 cavities, fruit a berry ; flowers on stalks, most commonly in 

 pairs from the axils, sometimes solitary or in clusters of 3-5 ; leaves from 

 wavy-margined to pinnately cut, somewhat fleshy ; perennial. 

 Stems spreading or flat, 2-8 in. high ; leaves spatulate 

 to ovate, 1-3 in. long; flowers 2-3 cm. wide Q. lobdta 



