KEY FOR JUNE TO NOVEMBER 



160 a Flowers small, numerous, in panicles or panicled racemes 161 

 b Flowers not in panicles 162 



161 a Leaves ovate, all basal Alisma. p 112 



b Leaves obovate, not all basal Samolus. p 197 



162 a Flowers ^4 in. or less broad, in terminal spikes 163 



b Flowers usually more than V in. broad, not in terminal 



spikes 164 



163 a Flowers greenish Potamogeton. p no 



b Flowers pink or whitish Polygonum. p 146 



164 a Flowers -/4-% in. broad, white or yellow 



Limnamthemum. p 200 

 b Flowers not completely as in a 165 



165 a Flowers about % in. broad, purple Brasenia. p 151 



b Flowers i in. or more broad 166 



166 a Flowers yellow, the petals stamen-like. .Nymphaea. p 151 

 b Flowers not yellow, petals not as in a Castalia. p 151 



Terrestrial Green Herbs With Green or Greenish Flowers 

 or the Flowers Without a Distinct Perianth 



167 a Flowers green or greenish or without a distinct perianth. 168 

 b Flowers not completely as in a 260 



1 68 a Leaves at least 3 times longer than broad, usually i in. 



or less broad, with entire margins and parallel veins, 



or leaves sometimes wanting 169 



b Leaves not completely as in a 191 



169 a Plant 2-6 ft. high; leaf-like organs linear; flowers bell- 



shaped about % in. long Asparagus, p 135 



b Plants not completely as in a 170 



170 a Leaves i in. or less long, scale-like or awl-shaped .... 171 

 b Leaves not completely as in a 176 



171 a Branches of stem opposite, fleshy, cylindric; stem jointed 



Salicornia. p 148 

 b Branches not completely as in a 172 



172 a Plants prostrate, spreading on the ground 173 



b Plants more or less erect, not spreading on the ground 174 



173 a Flowers in the axils of the branches or leaves 



Scleranthus. p 151 



b Flowers at the ends of the branches Sagina. p 151 



174 a Some or all of scale-like leaves opposite. .Bartonia. p 199 

 b Leaves or branches alternate 175 



175 a Leaves prickly-pointed Salsola. p 148 



b Leaves thick, not prickly-pointed Dondia. p 148 



176 a Flowers in globose heads % in. or more in diameter 



Sparganium. p no 

 b Flowers not in globose heads % in. in diameter 177 



37 



