KEY TO CULTIVATED HERBS AND POTTED SHRUBS 



162 a Leaves pinnatifid, covered with white- woolly hairs .... 163 

 b Leaves not white-woolly 165 



163 a First or lowest leaves not pinnatifid; heads Vi-Vz in. 



broad Centaur ea cineraria, p 239 



b All leaves pinnatifid 164 



164 a Leaves usually fragrant; heads arranged in cymes or 



panicles Artemisia, p 238 



b Leaves not fragrant; heads arranged in dense corymbs 



Senecio cineraria, p 238 



165 a Leaves doubly compound; leaflets 1-3 in. long, ovate 



Aegopodium. p 193 

 b Leaves merely lobed, not compound 166 



166 a Plant 2 ft. or more high; leaves 4-24 in. broad, pal- 



mately 6-n-lobed, the lobes toothed Ricinus. p 180 



b Plants not completely as in a 167 



167 a Leaves with very unequal bases Begonia, p 188 



b Leaves not with unequal bases 168 



168 a Leaves all basal Saxifraga. p 161 



b Leaves not all basal 169 



169 a Leaves oblong, irregularly lobed, the sinuses rounded; 



flowers small, greenish Chenopodium botrys. p 14.8 



b Plants not completely as in a Pelargonium, p 177 



170 a Flowers numerous, collected into a dense head subtended 



by an involucre of numerous green bracts 171 



b Flowers not completely as in a 178 



171 a Leaves with prickly lobes; heads globose. .Echinops. p 24.0 

 b Leaves not with prickly lobes 172 



172 a Leaves strongly aromatic 173 



b Leaves not aromatic 174 



173 a Bracts of involucre united into a tube Tagetes. p 2 35 



b Bracts of involucre in several rows, not united into a 



tube Anthemis. 



174 a Outer flowers in the head with the corolla obliquely 



5-cleft, tubular, somewhat irregular but not strap- 

 shaped Centaur ea. 



b Flowers not completely as in a 175 



175 a Lower leaves 5-12 in. broad, pinnately 3~7-divided, the 



segments toothed or lobed ; heads 2-4 in. broad, 



yellow Rudbeckia laciniata. p 234. 



b Plants not completely as in a 176 



176 a Achenes not crowned by a pappus. .Chrysanthemum, p 237 

 b Achenes crowned by a pappus of bristles 177 



177 a Receptacle of head usually flat; ray flowers usually 



numerous Callistephus. p 235 



b Receptacle of head convex or globose; ray flowers few 



or wanting Gaillardia. p 234 



