KEY TO CULTIVATED HERBS AND POTTED SHRUBS 



217 a Flowers double, in a terminal corymb or umbel 



Pelargonium, p 177 

 b Flowers not double; petals 5 218 



218 a Flowers subtended by 3 bracts . . . .Malva sylvestris. p 185 

 b Flowers subtended by 6-9 bracts Althaea, p 185 



219 a Each leaf with a sheath which enfolds the stem ; leaves 



entire, often linear, with parallel veins 220 



b Leaves not completely as in a 234 



220 a Leaves 3-8 ft. long, tufted, mostly basal . . . Cortaderia. p 1/8 

 b Leaves 3 ft. or less long 221 



221 a Average leaf 2-3 ft. long 222 



b Average leaf less than 2 ft. long 223 



222 a Leaves striped or banded with yellow ; panicle Vs-i ft. 



long Miscanthus. p 1/8 



b Leaves striped or banded with white; panicle 1-2 ft. 



long Erianthus. p 118 



223 a Average leaf 1-3 in. broad, 6 in. or more long 224 



b Average leaf not completely as in a 225 



224 a Leaves green, shining above; panicle 6-15 in. long 



Arundinaria. p 118 

 b Leaves usually variegated ; panicle 1-2 ft. long 



Arundo. p 118 

 2*25 a Upper leaves clustered in a whorl at the top of the 



stem Cyperus alternifolius. p 123 



b Upper leaves not as in a 226 



226 a Grasses with green leaves, cultivated in lawns 227 



b Plants not completely as in a 228 



227 a Branches of panicle usually solitary; spikelets 2-6- 



flowered Poa annua. p 122 



b Branches of panicle several in a whorl ; spikelets 



i-flowered Agrostis alba, p 121 



228 a Average leaf 6 in. or more long 229 



b Average leaf less than 6 in. long 231 



229 a Basal leaves wanting; leaves green, often channeled 



Tradescantia virginiana. p 132 

 b Basal leaves numerous, usually variegated 230 



230 a Leaves stiff, evergreen; flowers in spikes 



Carex morroivi. p 125 

 b Leaves not stiff or evergreen; flowers in panicles 



Phalaris. p 122 



231 a Leaves lanceolate, 2-5 in. long 232 



b Leaves ovate, 1-3 in. long 233 



232 a Sheaths of leaves inflated, hairy; flowers a /-i in. 



broad, blue Commelina. p 132 



b Sheaths of leaves not inflated or hairy; flowers incon- 

 spicuous Oplismenus. p 122 



94 



