KEY FOR MARCH, APRIL AND MAY 



155 a Flowers in terminal umbels; leaves white-glaucous be- 



neath Andromeda, 



b Flowers in racemes; leaves not white-glaucous beneath 156 



156 a Flowers in leafy racemes; leaves scurfy beneath 



Chamaedaphne. p 195 

 b Flowers in naked racemes; leaves smooth beneath 



Leucothoe catesbaei. p 195 



157 a Leaves with yellow resin dots beneath .. Gaylussacia. p 196 

 b Leaves not with yellow resin dots beneath 158 



158 a Stamens very conspicuous, extending beyond the corolla; 



corolla deeply f-lobed Polycodium. p 196 



b Stamens not extending beyond the corolla 159 



159 a Corolla globose, much narrowed at the opening 



Xolisma. p 195 

 b Corolla not globose, but sometimes narrowed at the 



opening 160 



160 a Ovary inferior V actinium, p 196 



b Ovary superior 161 



161 a Flowers about ^4 in. long, in dense i -sided racemes 



Leucothoe racemosa. p 195 

 b Flowers about % in. long, in lateral umbels. .Pieris. p 195 



Herbs 



162 a Herbs growing either floating or submerged in water 163 

 b Herbs not growing completely as in a 165 



163 a Leaves linear, % in. or more long Philotria. p 112 



b Leaves not completely as in a 164 



164 a Leaves rounded, 3 in. or more broad; flowers solitary on 



a stalk Nymphaea. p 151 



b Leaves ovate, 5 in. or more long; flowers numerous 



in a spike Orontium. p 132 



165 a No part of plant green; plants parasitic 166 



b Plants with green stem and green leaves 167 



1 66 a Plant whitish ; flowers solitary Thalesia. p 212 



b Plant light-brown; flowers several. .. .Conopholis. p 212 



167 a Plant with a disagreeable, skunk-like odor; flowers 



in a globose head surrounded by a shell-shaped, purple- 

 streaked spathe Spathyema. p 132 



b Plants not completely as in a 168 



168 a Leaves tubular, pitcher-like, with a terminal lid; plant 



growing in bogs Sarracenia. p 160 



b Leaves not as in a 169 



Herbs With Flowers Greenish or Else Without 

 a Distinct Perianth 



169 a Flowers green or greenish or without a distinct perianth 170 

 b Flowers not as in a 204 



13 



