Key 



31 



Page 



( 1 ) Lower lip much 



broader than upper .... Siphonoglossa — 195 



(2) Lower and upper lip 



about equal Pentstemon — 191 



(s) Flowers not 2-lipped. 



( 1 ) Corolla-like calyx 



funnel-form Mirabilis — 73 



( 2 ) Corolla-like calyx 



saucer-shaped Allionia — 74 



(3) Corolla wheel-shaped Phlox — 168 



e. Flowers blue to purple. 



m. Shrubs Callicarpa— 180 



n. Plants with creeping stems Monniera — 192. 



o. Plants neither shrubs nor vines, 

 (x) Stems square, 

 r. Flowers in flat-topped clus- 

 ters Verbena— 177-g 



s. Flowers not in flat-topped 

 clusters. 



(1) Corolla trumpet-shaped 



over 1" long Ruellia— 194 



(2) Corolla not trumpet 

 shaped. 



(m) Corolla with raised 



purple dots within Calophanes — 193 



(n) Corolla wheel-shaped, 



5-lobed Verbena— 178 



(0) Corolla tubular, 2-lipped 



— See Key to Men- 



thaceae Menthaceae — 180 



(y) Stems not square. 



(a) Petals distinct. 



(1) Fruit with a long beak Erodium — 112 



(2) Fruit without a beak... Nemophila — 16$ 



(b) Petals united at least at 

 base. 



r. Corolla tubular. 



(1) Lower lip much broader 



than upper Siphonoglossa — 195 



(2) Lower and upper lip 



about equal Calophanes — 19S 



s. Flowers saucer-shaped. 



