I3 o ROSACEAE. 



orbicular, cordate, long-petioled, 3-7-lobed, the lobes crenate-dentate; cauline 

 1 I similar but smaller, short-petioled; panicle narrow, loose, 5-15 cm. long; 

 flow, r^ white; petals small, thread-like. In moist woods in the mountains. 



183. HEUCHERA. Alum Root. 



Perennial herbs; leaves mostly basal, long-petioled, rounded, 

 mostly cordate; cauline, if any, alternate; petioles with dilated 

 margins or adherent stipules; flowers greenish or purple, in 

 clusters which form a long narrow panicle; calyx tube campanu- 

 late, 5-lobed, coherent with the lower half of the pvary; Jobes 

 sometimes unequal; petals 5, small, entire, sometimes minute 

 or wanting, or early deciduous; stamens 5; styles 2, slender; 

 ovary 1 -celled, with 2 parietal placentae; capsule 1-celled, more 

 or less 2-beaked ; seeds numerous. 



Petioles and scape hirsute. H. cylindrica. 

 Petioles and scape not hirsute. 



Herbage glabrous or nearly so. H. glabella. 



Herbage glandular puberulent. H. ovalifolia. 



Heuchera cylindrica Dougl. (H. columbiana Rydb.) Leaves all basal, 

 reniform-cordate, 5-7-lobed, crenate-dentate, the teeth cuspidate, the petioles 

 much longer than the blades and villous; stems erect, villous below, 3CH50 

 cm. high; inflorescence spike-like, very dense, 5-10 cm. long; calyx yellowish, 

 7-9 mm. long. Infrequent, Lewiston and Spokane County. 



Heuchera glabella T. & G. Tufted, glabrous or nearly so below the in- 

 florescence; leaves all radical, cordate-orbicular, 5-9-lobed, obscurely crenate, 

 the teeth bristle-tipped, 2-5 cm. broad; petioles slender, mostly 2-4 times as 

 long as the blades; scapes stout, 30-60 cm. high; inflorescence a spike-like 

 panicle, glandular-puberulent; calyx yellowish, campanulate, 6-7 mm. long. 

 ( .rassy hillsides, common. 



Heuchera ovalifolia Nutt. Densely and minutely glandular-pubescent 

 throughout; leaves all basal, broadly oval or ovate, slightly cordate, shallowly 

 5-lobed, crenate-dentate; stems erect, 10-30 cm. high; inflorescence dense, 

 2-6 cm. long; calyx greenish, 6-7 mm. long. Rocky places in the Blue Moun- 

 tains. 



Family 45. ROSACEAE. Rose Family. 



Herbs, shrubs or trees; leaves alternate, simple or compound, 

 usually with evident stipules which are often quickly deciduous; 

 flowers regular, mostly perfect, rarely polygamo-dioecious; calyx 

 of 5, rarely 3-8, sepals, united at the base, often surrounded by 

 a row of bractlets; calyx-tube lined by the disk; petals as many 

 as the sepals, rarely wanting, on the edge of the calyx-tube; 

 stamens usually numerous, or few and coherent with the calyx- 

 tube; carpels 1-many, distinct and free, or few and coherent 

 with the calyx-tube into a 2-several-celled inferior ovary; seeds 

 few or solitary; endosperm none, scanty or rarely copious. 



