PENTANDRIA— MONOGYNIA. 



late, repandly crenate-dentate, pulverulent be- 

 neath; umbel many -flowered; peduncles spread- 

 ing ; border of the corolla flat, as long as the tube, 

 with obtuse, obcordate segments. 

 IIAB. Shores of lakes. H. Leaves all rad.witha 

 yellowish- green powder beneath; fl. pale purp. 



115. DODECATHEON. American Cowslip. 



Lysimachim. 



I. D. meadia : leaves oblong-oval, repandly toothed , 

 umbel many flowered, lax ; bracts oval. 

 HAB. Rocky river sides- May. U. Leav. rad., A 

 in. long: scape 8 — 10 in. long; Jl, nodding, -purp. 

 I. D. integrifotium : leaves oblong-oval, subspathulate : 

 umbel few-flowered, straight ; bracts linear. 

 HAB. Mountains. U . FL pale blue, smaller than the 

 preceding. 



146. MENYANTHES. Buck-bean. Gentians. 



M. trifoliate: leaves ternate. 



(TAB. Swamps. May. H . Stem a span high ; leaflet* 

 obovate : fl. reddish-white, in a pyramidal raceme. 



147. VILLARS1A. Gentiance. 

 V. lacunosa : leaves reniform, subpeltate, slightly 



crenate, lacuuose beneath ; petioles bearing the 



flowers : corolla smooth. 

 HAB. In ponds, floating. Au<;. U . Petioles very long ; 



leav. 1 in. long ; fl. subumbellate, white. 



148. HOTTONIA. Water-feather. Lysimachice. 

 B. inflata : scape articulate, with thfi inte modes and 

 lower part inflated ; flowers verticillate, peduncu- 

 late. 

 OAB. Swamps, — subaquatic. H. Stem thick ■ tear. 

 ctinnte ; fl. white. 



M9. SAMOLUS. Brookweed. Lysimachim. 



>. valerandi: stem erect ; leaves obovate ; raceme? 



elongated, many-flowered. 

 HAB. Wet places. June— Oct. U. 8-^10 in. High 

 a., minute, a : -. 



