130 ROSACEAE. 



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

 1-3, similar but smaller, short-petioled ; panicle narrow, loose, 5-15 cm. long; 

 flowers 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 ovary; lobes 

 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, 30-60 

 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, S-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. 

 Grassy 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. 



