ROSACEAE. 197 



Heuchera micrantha Doiigl. More or less villous; stems erect, 30-60 cm. 

 high, bearing 1-3 leaves or scapiform; basal leaves cordate-orbicular, obtusely 

 lobed, crenate with cuspidate teeth, usually pubescent beneath, ciliatc, 2-6 

 cm. broad, the slender petioles usually pilose with reddish hairs; panicle loose, 

 glandular-puberulent; calyx turbinate, the ovate lobes of equal length; petals 

 white, oblanceolate, clawed, becoming twisted. 



Common on rocky cliffs. The less pubescent or nearly glabrous form is 

 considered by some botanists distinct under the name H. nuttallii Rydb. 



Heuchera chlorantha Piper. Tufted from a branching caudex; leaves all 

 basal, orbicular to reniform, cordate, 7-9-lobed, the lobes broadly rounded 

 and dentate, glabrous except on the veins beneath; petioles slender, sparsely 

 pilose with brownish hairs; scapes 50-100 cm. high, villous; inflorescence a 

 dense narrow panicle 5-10 cm. long; bracts ovate to lanceolate, fimbriate, the 

 lower ones 3-cleft; calyx greenish, turbinate-canipanulate, the lobes oblong; 

 petals minute or wanting. 



In damp meadows, not rare. This species has generally been confused with 

 H. cylindrica Dougl. of the interior. 



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. 



In rocky places, mostly on the east slope of the Cascade Mountains and in 

 the interior, but known from Mount Hood, Oregon. 



Family 49. 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. 



The so-called " calyx-tube " in this family is partly or wholly 

 a hollowed-out receptacle, sometimes called the hypanthium. 



Pistil one. 



Fruit a drupe; petals present, white. 



Flowers perfect; carpel one. 262. Prunus, 199. 



Flowers dioecious; carpels 5. 263. Osmaronia, 199. 



Fruit an akene; petals none, or if present, yel- 

 low. 

 Petals 5, yellow; calyx prickly. 274. Agrimonia, 205. 



Petals none; calyx not prickly. 



Leaves palmately-lobed; flowers axil- 

 lary. 275. Alchemilla, 206. 

 Leaves pinnately-lobcd; flowers in a 



spike. 276. Sanguisorba, 206. 



