236 The Ohio Naturalist. [Vol. XIV, No. 3, 



all equal and perfect in the following genera except Petunia. 

 Gynecium of 2 united carpels, rarely 3 or 5; ovules and seeds 

 numerous; fniit a berry or capsule. 



Key to the Genera. 



1. Corolla funnelform, fruit a capsule. 2. 



1. Corolla campanulate to rotate, fruit a berry, sometimes nearly dry. 4. 



2. Flowers in large terminal racemes or panicles, viscid-pubescent; 



calyx tubular-campanulate or ovoid. Nicotiana. 



2. Flowers axillary or in simple, leafy racemes. 3. 



3. Calyx tube \i inch long and with long, leaf-like lobes. Petunia. 



3. Calyx tube an inch or more long. Datura. 



4. Stems woody, often with thorns, leaves lanceolate, fruit a nearly dry 



berry. Lycium. 



4. Stems herbaceous, or if woody then the leaves lobed or compound, 



and fruit a fleshy berry. 5. 



5. Anthers unconnected, corolla broadly campanulate, fruiting calyx 



enlarged. 6. 



5. Anthers connivent or slightly connate, corolla rotate, fruiting calyx 



not enlarged. 7. 



6. Ovulary 3-o-locular, fruiting calyx deeply 5-parted, corolla pale blue. 



Phy sal odes. 



6. Ovulary bi-locular, calyx 5-lobed, not parted, corolla yellow or whit- 



ish, often with a dark centre. Physalis. 



7. Anthers opening by terminal pores or short slits, leaves entire, lobed 



or pinnately compound. Solanum. 

 7. Anthers longitudinally dehiscent, leaves usually bi-pinnatifid, 

 or bi-pinnate. Lycopersicon. 



Petunia Juss. 



Viscid-pubescent herbs with entire leaves. Flowers white, 

 violet, or purple, having funnelform corollas with plicate, spreading 

 or slightly irregular limbs; stamens 5, united with the corolla, 4 

 of them didynamous, perfect, the fifth smaller or obsolete; filaments 

 slender; ovtilary bilocular. 



1. Petunia violacea Lindl. Common Petunia. Very viscid, 

 from 8 to 25 inches high. Leaves ovate or obovate, all but the 

 uppennost petioled, mostly obtuse; corolla commonly violet- 

 purple with a campanulate tube, the limb plicate; sepals linear. 

 Monroe, Franklin. Native of South America. 



Nicotiana L. 



Viscid-pubescent narcotic herbs or shrubs. Leaves entire or 

 slightly undulate; flowers white, yellow, greenish or purplish; in 

 terminal racemes or panicles; calyx tubular-campanulate or 

 ovoid, o-cleft; corolla-tube usually longer than the limb, 5-lobed, 

 spreading; stamens 5, united with the corolla; ovulary bilocular, 

 rarely 4-locular; style slender; stigma capitate. 



1 . Nicotiana tabacum L. Common Tobacco. Large, showy 

 herbs about '.'A) or m< re inches high. Leaves lance-ovate, decur- 

 rent, or the upper ones lanceolate; flowers rose-purple, in panicles 

 with funnelform corolla, with somewhat inflated throat and short 

 lobes. Huron, Adams. Escaped from cultivation. 



