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A revision of the genus Mitella etc. 385 



ovoid, depressed, dehiscing early and evaginating in ripening; seeds black, 

 shiny. 



In damp woods and moist slopes in the mountains. Distributed from 

 about latitude 36'* N. in the high Sierra Nevada Mountains of California, 

 northward into the Cascade Range to about latitude 52" N. It occurs also 

 in the Coast Range in Ghehalis County, Washington, and probably in the 

 Olympic Mountains. In the Rockies, it is distributed from middle western 

 Idaho, northwestern Montana, and northward in British Columbia to about 

 latitude 52" N. 



A number of geographical forms can be distinguished in this species, 

 the most noteworthy being the following: 



Forma lobata. — With very large prominantly crenate-lobed, shallow- 

 toothed leav^es; inflorescence with numerous 2-flowered cymes and up to 

 45 flowers, pedicels very slender, wide-spreading and longer than in the 

 typical species, flowers inclined to be smaller. 



In Placer and Nevada Counties, California, in the region of Lake Tahoe 

 and Donner Lake. 



Chestnut and Drew, Glen Alpine. J. Burt Davy, No. 3231. E. A. 

 McGregor, No. 97. 



Forma denticulata. — Leaves obscurely crenate-lobed, minutely ser- 

 rate or denticulate, thin and veiny, pedicels of the flowers short, not over 

 2 mm. long. 



In the Canadian Rockies and Silkirk Mountain, British Columbia. 

 F. K. Butters and E. D. W. Holwat, No. H2, Prospectors Valley. 



«. Mitella ovalis Greene, Pittonia 1: 32. 1837. — M. Hallii Howell, 

 Erythea 3: 35. 1895. — Fediantia ovalis (Greene) Rydb. N. Am. Fl. 22: 

 2. 94. 1905. — Rhizome creeping, stolon-like, with prominent scale leaves; 

 flowering stems erect, 1.5—3.5 dm. high, naked or with 1 or 2 brownish 

 l^t-acts, more or less hirsute with spreading hairs, leaves all basal, oval or 

 oblong-ovate, with 5 — 9 rounded or crenate lobes, broadly crenate-toothed, 

 upper surface pubescent with scattered, coarse, white hairs, hirsute along 

 the veins beneath, 2.5—7 cm. long, 1.5—4.5 cm. broad; petioles sloutish, 

 — 1 I cm. long, densely rctrorse-hirsute with long rusty hairs; inflorescence 

 racemose, but often with numerous 2-fiowered cymes towards the base, 

 glanJular-pubcrulent, 10— 35-nowered, 4—12 cm. long; pedicels about 

 ^ i»im. long, bracts minute, triangular; flowers greenish yellow, about 5 mm. 

 Inroad in anthesis; axis flattened; sepals triangular, 1 mm. long, reflexed 

 <it the tips; petals pectinate-pinnatifid with 3—5 flliform divisions, 1.5— 

 ^•7 mm. long; stamens 5, opposite the sepals, very short, anthers cordate; 

 ovary inferior, styles spreading, deflexed at the ends, stigmas 2-lobed, 

 ovules few; capsule ovoid, dehiscing into a cup-shaped fruit; seeds few, 

 hlack or brownish. 



f^otaiiisclie .J.alubfiolier. L. Bd. Supplementh.iiid. 25 



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