KEY TO CULTIVATED HERBS AND POTTED SHRUBS 



233 a Leaves red or purple beneath, somewhat silvery above 



Zebrina. 

 b Leaves not red or purple beneath 



Tradescantia fluminensis. p 132 



234 a Leaves distinctly opposite or in whorls on the stem. ... 235 

 b All leaves alternate or basal 279 



235 a Climbing vines 236 



b Plants not climbing 239 



236 a Leaves triangular-ovate, angularly toothed 



Thunbergia. p 213 

 b Leaves not as in a 237 



237 a Leaves ovate-heart-shaped, 7-9-veined, shining 



Dioscorea divaricata. p 137 

 b Leaves not completely as in a 238 



238 a Flowers tubular with 4 short lobes; leaves entire 



Manettia. 

 b Flowers not tubular; perianth parts distinct 



Clematis hybrida. p 153 



239 a Plants cultivated for their variegated or colored leaves 240 

 b Plants not cultivated for their leaves 245 



240 a Leaves velvety with white or red veins. .. .Fittonia. p 213 

 b Leaves not completely as in a 241 



241 a Plant with 4- angled stems; leaves toothed .... Coleus. p 208 

 b Plants not with 4-angled stems 242 



242 a Leaves thick, fleshy, with wavy or toothed margins 



Bryophyllum. p 161 

 b Leaves not fleshy, usually with entire margins 243 



243 a Petioles with conspicuous glands; flowers i in. or more 



broad Vinca. p 200 



b Petioles not with conspicuous glands ; flowers V in. or 



less broad 244 



244 a Leaves rounded to ovate, often notched at the apex 



Iresine. p 14.8 

 b Leaves ovate to lanceolate or oblanceolate. Telanthera. p 148 



245 a Leaves thick, light-green ; plant growing South as a par- 



asite on trees; used for decorations in the North 



Phoradendron. p 14.$ 

 b Plants not completely as in a 246 



246 a Flowers collected in heads which are subtended by 



several bracts 247 



b Flowers not arranged as in a 252 



247 a Leaves with entire margins 248 



b Leaves with toothed margins 249 



248 a Leaves ovate-heart-shaped, sessile Zinnia, p 235 



b Leaves oblong to linear, petioled.Coreopsis lanceolata. p 235 



249 a Heads 2 in. or more broad 250 



b Heads ty in. or less broad 251 



95 



