KEY FOR MARCH, APRIL AND MAY 



285 a Flowers whitish; calyx subtended by 2 bractlets 



Gratiola. 

 b Flowers purplish ; calyx not subtended by 2 bractlets 



llysanthes. p 211 



286 a Conspicuous, ovate, entire, overlapping bracts subtend- 



ing each 1-3 flowers; spike 1-4 in. long. . . .Prunella, p 206 

 b Bracts subtending the flowers not completely as in a. . 287 



287 a Flowers %-i in. long 288 



b Flowers % in. or less long 289 



288 a Stamens 2, the connective of the anther elongated and 



hinged to the filament Salvia. p 206 



b Stamens 4, not as in a Pentstemon. p 210 



289 a Stamens 4; flowers in panicles Scrophularia. p 210 



b Stamens 2 ; flowers in spikes or racemes 290 



290 a Flowers Vi-Vz in. long, in dense long-stalked spikes 



Dianthera. p 213 



b Flowers -!4 in. or less long Veronica, p 211 



291 a Leaves linear, thick, with onion-like odor. .A Ilium, p 133 

 b Leaves not with an onion-like odor 292 



292 a Perianth parts 3 or 6, not tubular; stamens 3 or 6 .... 293 

 b Flowers not completely as in a 303 



293 a Ovary inferior; flowers usually blue 294 



b Ovary superior 295 



294 a Flowers % in. or less broad Sisyrinchium. p 138 



b Flowers i in. or more broad Iris, p 137 



295 a Flowers blue, purplish, or rose-colored 296 



b Flowers not colored as in a 298 



296 a Flowers 1-2 in. broad, subtended by leaf-like bracts 



Tradescantia. p 132 



b Flowers Vi -Vz in. broad 297 



297 a Flowers in dense terminal racemes Helonias. P 133 



b Flowers solitary or 2 together Streptopus. p 136 



298 a Flowers about ^4 in. or less broad 299 



b Flowers % in. or more broad 301 



299 a Both basal and stem leaves present; flowers in wand- 



like racemes Chamaelirium. p 133 



b Only stem leaves present 300 



300 a Plants with tendrils Smilax. p 136 



b Plants not with tendrils Vagnera p 135 



301 a Leaves 3 in a terminal whorl Trillium, p 136 



b Leaves mostly basal 302 



302 a Leaves lanceolate; flowers solitary 



Erythronium albidum. p 135 

 b Leaves linear, thick ; flowers in umbels . Ornithogalum. p 135 



303 a When broken plants exude a milky juice 304 



b When broken plants do not exude a milky juice 305 



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