' t^ i 



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382 



C. 0. Rosendahl. 



In the Rocky Mountains from southern Montana to about latitude 



52 « N. 



Forma niicrantha — 3L micrantha Piper, Erythea 7: 162:. 1899, 



Oxomelis micrantha (Piper) Rydb. N. Am. Fl. 22: 2. 96. 1905. — FJowers 

 small, petals entire, 3-veined; stems flexous; leaves cordate, some of them 



large and obscurely lobed, others of typical shape. 



Fort Golville, Washington, collected by S.Watson, Sept. 29. 1880. 



Note: This plant appears somewhat abnormal in its flowers, probably due io the 

 fact that it was blooming so late in the year. The foliage is nearly identical with that 

 of specimens from Mt. Stewart, Wash, collected by Sandberg and Leiberg in 1893. In 

 the examination of a very large number of specimens we have found nothing to cor- 

 respond with the type and therefore feel constrained to regard it merely as a curious 

 or aberrant form, M. anomala Piper appears to be nothing but an individual plant in 

 which the petals are wanting and some of the stamens modified into staminodia. We 

 do not see how it ever could have been regarded as a species for even the type is a 

 poor specimen with a few flowers mostly in fruit. 



Note: Oxmnelis paciflca Rydh, is in our opinion nothing but larger flowered forms 

 of M, trifida Graham and comes closer to being the typical species as originally des- 

 cribed and figured by Graham and later by Hooker in the FI. Bor. Am. than Oxomelis 

 trifida (Graham) Rydb. of the N. Am. Fl. It should be borne in mind that the species 

 was originally described from plants grown in the Edinburgh Botanic gardens from 

 seeds brought from the northern Rocky Mts. and that in a climate like that of Edin- 

 burgh more robust and larger flowered individuals, more like those of the Cascade and 

 Olympic Mountains, would likely develop than in the high and dry northern Rockies. 



4. Mitella diversifolia Greene, Pittonia 1: 32. 1887. — M. diversi- 

 loba Piper, Erythea 7: 162. 1899. — Oxomelis diversifolia (Greene) Rydb. 

 N. Ani. Fl. 22. 2. 94, 1905. — Rhizome ascending or erect, thickened; 

 flowering stems several, stoutish towards the base, 2 — 4 dm. high, usually 

 bearing a single long-petioled leaf some distance from the base, glandular- 

 puberulent thoughout; basal leaves triangular-cordate, with a deep sinus 

 at the base, more or less angularly lobed, irregularly crenate, glandular- 

 puberulent on both sides, with a few strigose hairs on the upper surface, 

 4 — 9 cm. long, 3—7 cm. broad; petioles 3 — 10 cm. long, retrosely hairy; ra- 

 cemes slender, 12— 35 flowered, 6 — 15 cm. long, lower flowers remote; flowers 

 3 — 4 mm. long, about 2 mm broad, nearly sessile; sepals erect, oblong triangu- 

 lar, strongly mucronate-pointed, very glandular-puberulent; petals cuneate, 

 palmately 3 — 5-cleft, not spreading, about 2 mm. long; stamens with oblong 

 anthers and very short filaments; ovary more than half fused with the 

 turbinate axis, styles very short and thick, stigmas capitate, glandular- 

 puberulent; capsule ovoid projecting very little beyond the sepals when 

 dehiscing; seeds black, very numerous. 



A distinct species; occurring in wet places in the moimtains from 

 northern California to southern Washington. 



5. Mitella nuda L. Sp. PI. 406. 1753. — M. scapo-nudo Gmel. Fl. 

 Siber. 4: 175. 1769. — Tiarella unifolia Retz. Obs. 3: 30. 1783. 





