SPECIES AND VARIETIES. 239 



not unlike E. hirsutum on a smaller scale, and is distinguish- 

 able from it by its much smaller flowers. 



ft Stigma club-shaped, entire. 



E. tetragonum : stems erect, often branched, 1-2 feet high, 

 glabrous or hoary with a very short down, more or less 

 angular from raised lines descending on each side from the 

 margins of the leaves ; leaves sessile, narrow, and toothed ; 

 flowers small, in terminal leafy racemes, the buds erect, the 

 petals pale pink, deeply notched ; pod often very long. Wet 

 ditches and watery places. Fl. July. 



E. palustre : stems round, ^-1 1 feet high ; leaves narrow, 

 lance-shaped, sessile, entire or not much toothed ; flowers 

 small, pale-coloured, in short terminal racemes, the buds nod- 

 ding. Boggy places, and watery ditches. Fl. July. 



E. alsinifolium : stems frequently branched, seldom more 

 than six inches high ; leaves very shortly stalked, ovate, 

 toothed; flowers large, purplish, in very, short, leafy racemes, 

 the buds nodding. Alpine rivulets and springs. Fl. July. 



E. alpinum: stems slender, 25 inches high, decumbent 

 and much branched, glabrous ; leaves stalked, small, ovate or 

 lanceolate, usually obtuse and entire; flowers rather large, 

 growing in the axils of the upper leaves, and forming short 

 leafy racemes, the buds nodding, the petals notched; pod 

 1-2 inches long, narrowed at the base into a long stalk. 

 Alpine rills, and wet places in mountain ranges. Fl. July. 



(101) (Enothera. EVENING PRIMROSE. 



CE. biennis : biennial ; stems almost simple, 2-3 feet high, 

 hairy ; leaves ovate -lanceolate or lanceolate, slightly toothed, 

 hoary or downy; flowers yellow, large, fragrant, opening in 

 the evening, forming long terminal spikes often leafy at the 



