SAXIFRAGE FAMILY 133 



3. M. caulescens Nutt. Stems 6 to 14 inches high, leafy; steins and petioles 

 glandular-hispidulose with very unequal spreading hairs, the leaf -blades sparsely 

 hispidulose; leaf -blades roundish-cordate, shallowly 5-lobed, irregularly crenate, 

 % to 1% inches wide, the basal on petioles 1^/2 to 2 14 inches long, the 2 or 3 cauline 

 shortly petioled; calyx yellowish, saucer-shaped, its lobes triangular; petals green- 

 ish, pinnately divided into 5 to 9 filiform lobes; filaments purplish; ovary only 

 slightly inferior; styles distinct. 



Moist shady places or cold wet meadows, 2000 to 5000 feet: Humboldt Co. 

 North to British Columbia and Montana. June. 



Locs. — Lawrence Creek, Tracy 6692; Bald Mt., Tracy 6361; Corral Prairie, Trinity Summit, 

 Tracy 10,634. 



Eefs. — MiTELLA CAULESCENS Nutt. ; T. &' G. Fl. 1:586 (1840), type loc. Columbia Eiver 

 near the mouth of the Willamette, Nuttall. Mitellastra caulescens Howell, Fl. Nw. Am. 201 

 (1898). 



4. M. breweri Gray. Plants 6 to 12 inches high; petioles and scapes with 

 scattered rusty hairs; leaf -blades round-cordate, shallowly lobed and crenate, ll^ 

 to 3 inches broad, glabrous on the upper surface, nearly so below; pedicels 1 to 3 

 lines long; petals pinnately divided into 5 to 7 rather remote capillary divisions; 

 capsule 1 line broad. 



Montane meadows and moist woods, 6000 to 11,000 feet : Sierra Nevada from Tu- 

 lare Co. to Sierra Co. North to British Columbia and northwestern Montana. July. 



Note on the flower. — The short style-branches spread at right angles to the style proper, 

 each 2-lobed with the lobes turned downward and somewhat divergent. The seeds are elliptic 

 with somewhat rounded ends, whereas in M. pentandra Graham they are oblong with somewhat 

 acute ends. 



Locs. — Upper Kern Eiver, Jepson; near Mt. Silliman, Jepson 744; Line Creek, Huntington 

 Lake, Jepson 13,103; Sunrise trail, above Little Yosemite, Jepson 3165; head of Eafferty Creek, 

 near Tuolumne Pass, Kennedy; Barrette Camp, 3 mi. s. of Tells Peak, Eldorado Co., Kennedy 

 61; Glen Alpine, Eldorado Co., Ottley 851. 



Eefs. — MiTELLA BREWERI Gray, Proc. Am. Acad. 6:533 (1865), type loc. Mt. Hoffman, 

 Bretver; Jepson, Fl. W. Mid. Cal. ed. 2, 201 (1911), Man. 462, fig. 454 (1925). Pectiantia Ireweri 

 Eydb. N. Am. Fl. 22:93 (1905). M. Ireweri f. loiata Eos.; Engler, Jahrb. 50: suppleb. 385 

 (1914), Placer and Nevada Cos. 



5. M. ovalis Greene. Plants 6 to 14 inches high; scapes and petioles rather 

 densely pilose with somewhat downwardly turned hairs; leaf -blades round-ovate 

 with cordate base, hirsute with scattered but rather conspicuous white or brown 

 hairs, % to 1% inches wide; pedicels 1 line long; petals pinnately divided into 3 

 capillary divisions (sometimes one lateral division wanting, often two wanting and 

 the petals thus linear-subulate), or sometimes into 5 divisions (ace. to Greene). 



Low ground, river bottoms or wet banks, 10 to 200 feet : Mendocino and Hum- 

 boldt coasts. North to British Columbia. Apr.-May. 



Locs. — Carlotta, Tracy 6176; Eureka, Tracy 818. It propagates by stolons and forms a 

 carpet in moist places. 



Eefs. — MiTELLA OVALIS Greene, West Am. Sci. 3:25 (1887), type loc. Mendocino Co., Bo- 

 lander; Pitt. 1:32 (1887) ; Jepson, Man. 462 (1925). Pectiantia ovalis Eydb. N. Am. Fl. 22: 94 

 (1905). 



6. M. pentandra Graham. Similar to M. breweri; petioles hairy, scapes not 

 so glabrous; leaf-blades hispidulose with scattered hairs or glabrous; calyx-tube 

 purple within; petals smaller, pinnately divided into about 5 to 7 capillary divi- 

 sions; capsule 2 lines broad. 



Montane, along shady cool streams, 5500 to 7500 feet : Sierra Nevada from 

 Tulare Co. to Sierra Co.; western Siskiyou Co. North to Alaska and Saskatche- 

 wan, east to Colorado. June-July. 



Loes. — Wolverton Creek, Tulare Co., Hopping 347; Home Camp Creek, Huntington Lake, 

 A. L. Grant 1420; Long Mdw., Tuolumne Co., Chesnut ^ Drew; Deadman Creek, near Sonora 

 Pass, Jepson 6568; Eubicon Park, Lake Tahoe; Yuba Pass, Sierra Co.; Marble VaUey, Butler 219. 



