204 UNIVERSITY OF MISSOURI STUDIES [346 



806. M. piperita L. Peppermint. 

 Scarce in wet waste places. 

 Europe, thence to North America. 



Family 95. SOLANACEAE Pers. Nightshade family. 



344. LYCIUM L. Matrimony vine. 



807. L. vulgare (Ait. f.) Dunal. 

 Along streets and roadsides. 



Europe, Africa and Asia, thence to North America. 



345. PHYSALIS L. Ground cherry. 



808. P. pubescens L. Hairy ground cherry. 

 Common in fields and waste places. 



Pennsylvania, Michigan and Missouri to California; 

 Florida to Central America. 



809. P. pruinosa L. 



Fields in rich soil; infrequent. 

 Massachusetts to Iowa; Florida to Missouri. 



810. P. Missouriensis Mack. & Bush [P. Lagascae Britton 

 & Brown, not R. & S.]. Missouri ground cherry. 



Common on cliffs and in dry thickets. 



Missouri to Kansas; Arkansas to the Indian Territory 



811. P. lanceolata Michx. Prairie ground cherry. 

 Frequent in dry fields and open wild places. 



North Carolina and Michigan to Wyoming; South Car- 

 olina to New Mexico. 



812. P. Virginiana Mill. Virginia ground cherry. 

 Common in fields and thickets. 



New York to Manitoba; Florida to Louisiana and Col- 

 orado. 



813. P. heterophylla Nees. Clammy ground cherry. 

 Very common in fields and waste grounds. 



New Brunswick to Saskatchewan; Florida to Texas and 

 Colorado. 



