KEY FOR MARCH, APRIL AND MAY 



321 a Ovary inferior; leaves rounded with clasping bases 



Specularia. p 217 

 b Ovary superior 322 



322 a Flowers about ^4 in. or less broad 323 



b Flowers Vz in. or more broad 330 



323 a Leaves lobed or pinnately compound. .Hydrophyllum. p 202 

 b Leaves entire or wavy-toothed 324 



324 a Corolla tube closed by 5 scales attached opposite the 



corolla lobes 325 



b Corolla tube not completely as in a 326 



325 a Nutlets spreading or divergent, entirely covered with 



prickles Cynoglossum. p 202 



b Nutlets erect or incurved, covered on the back and 



margins with prickles Lappula. p 202 



326 a Styles thread-like, much exserted; corolla lobes erect 



Onosmodium. p 203 



b Styles not completely as in a; corolla lobes spreading 327 



327 a Flowers in racemes 328 



b Flowers in umbels or panicles 329 



328 a Racemes with numerous leafy bracts. . .Lithospermum. p 203 

 b Racemes not with numerous leafy bracts. .Myosotis. p 203 



329 a Flowers in panicles; perianth differentiated. Samolus. p 197 

 b Flowers in umbels; perianth not differentiated 



Comandra. p 14.5 



330 a Leaves pinnately compound 331 



b Leaves not pinnately compound 332 



331 a Flowers in panicles; stamens alternate with the corolla 



lobes Polemonium. p 202 



b Flowers not completely as in a Solanum. p 208 



332 a Climbing or trailing vines 333 



b Erect herbs 335 



333 a Flowers about % in. broad with 2 greenish spots at 



the base of each corolla lobe. .Solanum dulcamara, p 209 

 b Flowers i in. or more broad 334 



334 a Leaves usually heart-shaped at base; stigma globose 



Ipomoea. p 201 

 b Leaves not usually heart-shaped at base ; stigma 2-lobed 



Convolvulus, p 201 



335 a Flowers 3-7 in. long Datura, p 209 



b Flowers 2 in. or less long 336 



336 a Corolla salver-shaped with lobes spreading at right 



angles to the corolla tube Phlox, p 202 



b Corolla rather funnel-shaped 337 



337 a Flowers about i in. long Mertensia. p 202 



b Flowers % in. or less long Cynoglossum. p 202 



338 a Two or more petals with a spur at the base 339 



b None of the petals With a sfpUr at the base 3410 



23 



