274 SOLANACEAE 



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

 quehanna; Al<I,EGHENY. 



30. COLLINSONIA L. 

 1. Collinsonia Canadensis L. Horse-bawm. 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. Perii,i,a. (Man. p. 807; I. F. 

 /. j/57. ) In waste places, escaped, N. Y. to 111. Nat. of India. — Penn- 

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



Famii,y 9. SOLANACEAE Pers. Potato Famii<y. 



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. Physalodks. 

 Ovary 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. Lycopkrsicon. 



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. FHVSALODES Boehm. 



1. Fhysalodes Fhysalodes (L- ) Britton. Appi,E of Peru. (Man. p. 

 808 ; I. F. /. 3i8g. ) In waste places, escaped, N. S. to Ont., south to Fla. 

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

 Lancaster ; Frankwn ; Ai,i,egheny. 



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. pruinosa. 



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

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



Foliage glabrous, at least in age. 



