274 SOLANACEAE 



Chester; Lancaster ; Dauphin; Franklin; Bedford ; Erie; Sus- 

 quehanna; Allegheny. 



30. COLLINSONIA L 

 1. Collinsonia Canadensis L. Horse-balm. Rich- weed. (Man. 

 p, 807 ; I. F. /^ 3186.) In moist woods, Me. and Ont. to Wis., Fla. and 

 Kans. — Pennsylvania : Northampton ; Bucks ; Chester ; Lancas- 

 ter ; Dauphin ; Cumberland ; Beaver. 



31. PERILLA Ard. 



1. Perilla frutescens (L.) Britton. Perilla. (Man. p, 807; I, F. 

 J. 3187.^ In waste places, escaped, N. Y. to 111. Nat. of India. — Penn- 

 sylvania : Bucks, Nockamixon ; Northampton, Easton ; York. 



Family 9. SOLANACEAE Pers. Potato Family. 



Fruit a berry. 



Corolla-tube plicate : lobes usually induplicate : berries pulpy. 



Anthers not connected : sacs opening lengthwise, not by terminal pores. 

 Ovary 3-5-celled : calyx-lobes nearly distinct, auricled at the base. 



I. Physalodes. 

 0%'ary 2-celled : calyx-lobes united to near the tips. 2. Physalis. 

 Anthers converging or connate. 

 Anther-sacs commonly opening by terminal pores or short slits. 



3. SOLANUM. 



Anther-sacs opening lengthwise and introrsely. 4. Lycopersicon. 



Corolla-tube barely, if at all plicate ; segments imbricated and berries dry. 



5. Lycium. 

 Fruit a capsule : corolla funnelform. 



Capsule circumscissle near the top, which separates as a lid. 



6. Hyoscyamus. 

 Capsule opening by valves. 



Capsules armed with prickles. 7. Datura. 



Capsules unarmed. 

 Flowers in racemes or panicles : filaments nearly equal in length. 



8. Nicotiana. 

 Flowers solitary in the axils or opposite the leaves : filaments unequal in 

 length. 9. Petunia. 



1. PHYSALODES Boehm. 



1. Physalodes Physalodes (L- ) Britton. Apple OF PERU. (Man. p. 

 808 ; I. F.y. 3/Sg.) In waste places, escaped, N. S. to Ont., south to Fla. 

 Adv. from Peru. — Pennsylvania : Northampton ; Bucks ; Chester ; 

 Lancaster ; Franklin ; Allegheny. 



2. PHYSALIS L. 



Plants annual, with fibrous roots. 

 Foliage manifestly pubescent even in age. 

 Leaf-blades cordate and oblique at the base, sinuate : stem obtusely angled: 



mature calyx 2-3 cm. long. i. P. firutnosa. 



Leaf-blades mostly truncate, scarcely oblique, repand-dentate : stem 

 acutely angled : mature calyx longer. 2. P. Barbadensis. 



Foliage glabrous, at least in age. 



