58 SELECTED WESTERN FLORA 



XXXVII. CRASSULACE^. 



Shrubby or succulent herbs with ex-stipulate leaves, and flowers 

 mostly in cymes; calyx 4r-5-cleft or parted, persistent, free from the 

 ovary; petals the same number as the calyx lobes, mostly distinct; 

 stamens as many or twice as many as the petals; carpels the same 

 number as the sepals, free at least above, with a scale at the base of 

 each. 



1. SfeDUM. Stonecrop. 



Calyx 4-5-lobed; petals 4-5, distinct; stamens 8-10, periginous, 

 half of them usually attached to the petals; carpels 4-5, distinct, 

 or united at the base, the scale at the base entirei. Fleshy, glabrous, 

 often tufted herbs, with alternate or overlapping leaves. 



1. S. stenopetalum, Pursh. 



Perennial, glabrous, tufted ; flowering stems 3-6 in. high ; leaves alternate, 

 or overlapping on the sterile branches; flowers yellow. Gravelly hills, 

 Rocky Mts. 



XXXVIII. SAXIFRAGACE.ffi (Saxipeage Family). 



Herbs or shrubs strongly resembling the Rosaoese, but mostly 

 differing in the following respects : leaves opposite as well as alter- 

 nate; no stipules; stamens a definite number; carpels fewer than the 

 sepals. The calyx is usually persistent, and may or may not adhere 

 to the ovary. 



1. MITELLA. MiTERWORT. 



Calyx short, 5-cleft, adhering to the ovary at the base; petals 5, 

 slender; stamens 5-10; styles 2, short; capsule 2-beaked. Low 

 perennial herbs with rounded heart-shaped leaves on slender petioles 

 springing from the root or rootstock, and slender, almost naked 

 flowering stems. 



1. M. nfida, L. 



Leaves deeply and doubly crenate; stem usually leafless and few-flowered. 

 Moist woods about Lake Winnipeg, westward to Alta. 



2. PARNASSIA. Grass of Parnassus. 



Sepals 5, united at the base, persistent; petals 5, white with green- 

 ish veins, spreading, bearing what resembles a tuft of sterile stamens 

 at the base; fertile stamens 5, alternate with the petals; ovary 



