KEY TO CULTIVATED HERBS AND POTTED SHRUBS 



283 a Stems flattened, jointed, the joints 1-2 in. long 



Epiphyllum. p 189 

 b Stems cylindric, ribbed Cereus flagelliformis. p 189 



284 a Vine with tendrils Passiflora gracilis. p 188 



b Vines not with tendrils 285 



285 a Leaves with the petiole attached to the underside of 



the blade Tropaeolum. p 178 



b Leaves with the petiole attached to the margin of the 



blade 286 



286 a Leaves or leaf-like organs sessile, glossy green, linear 



to ovate Asparagus, p 135 



b Leaves not completely as in a 287 



287 a Leaves heart-shaped at the base 288 



b Leaves not heart-shaped at the base 290 



288 a Leaves 6-12 in. broad ; flowers strongly curved 



Aristolochia macrophylla. p 14.5 

 b Plants not as in a 289 



289 a Flowers showy, tubular, i in. or more broa.d.Ipomoea. p 201 

 b Flowers small, % in. or less broad, not tubular 



Boussingaultia. p 14.7 



290 a Flowers funnel-shaped, sometimes double. Co nvolvulus. p 201 

 b Flowers with a slender tube and lobes spreading more 



or less at right angles to it Plumbago, p 198 



291 a Leaves 10-30 in. long, linear, with brown curly fibers 



on the margins Yucca, p 135 



b Leaves not completely as in a 292 



292 a Plants cultivated for their green or variegated leaves. . 293 

 b Plants cultivated for their flowers 321 



293 a Plants more or less covered with spines or prickles; 



leaves wanting; stems fleshy, cylindric. .. .Cereus. p 189 

 b Plants not completely as in a 294 



294 a Leaves very fleshy, thick, mostly basal 295 



b Leaves not noticeably fleshy 298 



295 a Leaves linear, 2-6 ft. long, with spiny-toothed margins 



Agave, p 137 

 b Leaves not completely as in a 296 



296 a Leaves V-shaped, with warty or horny margins. Aloe. P 133 

 b Leaves not as in a 297 



297 a Leaves ovate, 1-2 in. long Sempervivum. p 161 



b Leaves obovate, 2-4 in. long Cotyledon, p 161 



298 a Leaves with petiole attached to under side of blade. . 299 

 b Leaves with petiole attached to margin of blade 301 



299 a Leaves with toothed margins Saxifraga peltata. p 161 



b Leaves with entire margins 300 



300 a Petioles 3-8 in. long .Peperomia. p 139 



b Petioles 12 in. or more long Caladium. p 131 



98 



