KEY FOR JUNE TO NOVEMBER 



309 a Flowers in head-like whorls, the whorls subtended by 



white or purplish bracts Monarda. 



b Flowers and bracts not completely as in a 310 



310 a Flowers in panicles or racemes 311 



b Flowers in dense or interrupted spikes 313 



311 a Stamens 2, much longer than the corolla; flowers about 



Vz in. long Collinsonia. p 208 



b Stamens 4; flowers 1-2 in. long 312 



312 a Leaves broadly heart-shaped with entire or wavy mar- 



gins Martynia. p 212 



b Leaves ovate to lanceolate in outline, often deeply incised 



or pinnatifid Dasystoma. p 211 



313 a Flowers in dense whorls arranged in an interrupted 



spike Agastache. p 206 



b Flowers in terminal, bracted spikes 314 



314 a Leaves with entire margins Schwalbea p 212 



b Leaves pinnately lobed Pedicularis. p 212 



315 a Flowers more or less irregular 316 



b Flowers regular 330 



316 a One petal modified into a swollen lip % in. or more 



long Cypripedium. p 138 



b Petals not completely as in a 317 



317 a Calyx petal-like, with a spur bent upward. .Impatiens. p 184 

 b Flowers not completely as in a 318 



318 a Ovary inferior; petals 3, one modified into a lip 319 



b Ovary superior; petals not completely as in a 321 



319 a Plants with several leaves; i or more petals fringed 



Blephariglottis. p 139 

 b Plants with 1-3 leaves; petals not fringed 320 



320 a Leaves 2 in. or more broad, oval to ovate. . .Lysias. p 138 

 b Leaves i in. or less broad, linear to oblong 



Gyrostachys. p 139 



321 a One petal distinctly spurred at the base; sepals 2 



Capnoides. p 755 

 b None of the petals spurred 322 



322 a Petals 5, distinct; flowers only slightly irregular 



Cassia, p 170 

 b 2 of the petals usually united to form a keel 323 



323 a Plants with simple leaves Crotalaria. p 173 



b Plants with compound leaves 324 



324 a Vines with showy flowers about i in. long, 2-4 together 



on a stalk Vigna. p 174 



b Plants not completely as in a 325 



325 a Flowers in racemes 326 



b Flowers in globose or oblong heads, few to many 



flowered 327 



4* 



