GENTIANACEiE 109 



1. C. umbelUtum, Gilib. Centaury. 



Erect, 6-18 in. high, branched, the branches all ending on the same level; 

 leaves linear at the top, getting broader down the stem ; flowers rose-purple, 

 in flat-topped cymes. Sask., introduced. 



2. HALENIA. Spuered Gentian. 



Calyx 4 or 5-parted; corolla 4 or 5-cleft, without folds between the 

 lobes; each lobe with a spur at the base; stigmas 2, persistent; 

 capsule flattened. Small herbs with yellowish or purplish flowers. 



1. H. deflSxa, (Sm.) Griseb. 



Leafy annual with the lower leaves petioled, spatulate, the upper lanceo- 

 late; corolla 4-lobed, purplish-white. Cool woods, Man.-Alta. 



3. MENYANTHES. Btjckbean. 



Calyx 5-parted; corolla 6-oleft, short, the upper surfaces bearded; 

 style slender, persistent; stigma 2-lobed; capsule many-seeded. 

 Perennial glabrous marsh herbs with 3-foliate leaves on long sheath- 

 ing petioles, and white or purplish flowers. 



1. M. trifoUata, L. 



Rootstock thick; flowers in a raceme on a long scape-like peduncle. 

 Bogs, Man.-Alta. 



4. GENTIANA. Gentian. 



Calyx tubular, usually 5-oleft; ooroUa 4 or 5-lobed, often with 

 plaited folds between the lobes; stamens oij the corolla tube; stig- 

 mas persistent; capsule with innumerable small seeds. Low herb; 

 with showy, usually blue flowers, and blooming in late summer. 



* Without folds or plaits between the lobes op the corolla. 

 t Corolla large, blue. 



1. G. crinata, Froel. 



Erect, leafy, 6-18 in. high ; leaves lanceolate or ovate from a heart-shaped 

 or rounded base; corolla large, blue, strongly fringed around the summit. 

 Low-lying prairie in late summer, Man. and Sask. 



2. G. pr8cera. Holm. 



Erect, more slender and not so high as the preceding; leaves linear or 

 lance-hnear; corolla blue, ciliate-f ringed on the sides of the lobes and finely 

 dentate around the summit. (G. serrata of some authors.) Moist ground, 

 late summer, Man.-Alta. 



