PIPER—FLORA OF THE STATE OF WASHINGTON. 319 
MITELLA. 
Stamens opposite the pinnatifid green petals .........--.----------- 1. M. pentandra. 
Stamens alternating with the petals. 
Calyx green; petals pinnatifid. 
Stems bearing 1 to 3 leaves; stoloniferous.................- 2. M. caulescens. 
Stems leafless; not stoloniferous. 
Leaves broadly reniform-cordate.........-.----------- 3. M. brewerr. 
Leaves ovate......-.-.------------+------- ee ee ee eee 4. M. ovalis. 
Calyx white; petals trifid or entire. 
Petals entire; calyx-lobes obtuse... ........2.2.---- Leeeee 5. M. micrantha. 
Petals 3-cleft or 3-parted. 
Raceme secund; petals 3-parted with filiform divaricate 
lobes ...-.-.-2-2----2-2------------2-- 22-22-2222 2 ee 6. M. stauropetala. 
Raceme not secund; petals cuneate, 3-cleft at apex, the 
lobes not divaricate. 
Calyx-lobes obtuse; leaf lobes rounded. ..........- 7. M. trifida. 
Calyx-lobes acute; leaves angularly lobed.......... 8, M. diversifolia. 
1. Mitella pentandra Hook. Bot. Mag. 56: pl. 2933. 1829. 
Drummondia mitelloides DC. Prod. 4: 50. 1830. 
Mitellopsis drummondii Meisn. Pl. Vase. Gen. 1: 100. 1836. 
Type Loca.ity: ‘Rocky Mountains of North America.’”’ Type specimen raised from 
seed collected by Drummond. . 
Rance: British Columbia to Saskatchewan, Colorado, and Oregon. 
SPECIMENS EXAMINED: Olympic Mountains, Piper, August, 1895; Henderson, July 11, 
1892; Mount Rainier, Piper 2028; upper Nisqually Valley, Allen 5; Mount Stuart, Sandberg 
& Leiberg, June, 1893, 567; Stevens Pass, Piper, July, 1895; Wenache Mountains, Elmer 
165; Skokomish Valley, Kincaid, June, 1892; Cascade Mountains, Henderson, August, 
1892; Horseshoe Basin, Lake & Hull, August, 1892; Blue Mountains, Horner 122; Piper 
2410. . 
ZONAL DISTRIBUTION: Hudsonian. 
Rydberg considers that two species have been confused under M. pentandra, desig- 
nating them as Pectiantia pentandra and P. latiflora Rydberg. The somewhat larger 
flowers and hairy petioles of the latter are considered diagnostic, but we find all interme- 
diates in the size of the flowers and also find hairy petioles on small-flowered plants. Both 
extremes as to the size of the flowers occur in the Cascade Mountains. 
2. Mitella caulescens Nutt.; Torr. & Gr. FI. 1: 586. 1840. 
Mitellastra caulescens Howell, Fl. N. W. Am. 201. 1898. 
Type Loca.ity: “Shady woods of the Oregon near the mouth of the Wahlamet.” Col- 
lected by Nuttall. 
Rance: British Columbia to Oregon and north Idaho. 
SPECIMENS EXAMINED: Seattle, Piper 90; Skokomish Valley, Kincaid, May, 1892; 
upper Nisqually Valley, Allen 9; Falcon Valley, Suksdorf 365; woods of the Columbia, 
Nuttall; lower Frazer River, latitude 49°, Lyall in 1859; Mount Carlton, Areager 203. 
ZONAL DISTRIBUTION: Humid Transition. 
3. Mitella breweri A. Gray, Proc. Am. Acad. 6: 533. 1865. 
Type Locauity: “Mount Hoffman, in a damp place at about 11,000 feet altitude”’, 
California. Collected by Brewer. 
Rance: California to British Columbia and north Idaho. 
SPECIMENS EXAMINED: Baldy Peak, Lamb 1347; Mount Rainier, Piper 2030; Allen 48; 
Flett 303; Goat Mountains, Allen 86; Mount Adams, Henderson, August, 1892; Suksdorf 
364; Nason Creek, Sandberg & Leiberg 661. 
ZONAL DISTRIBUTION: Hudsonian. 
aN. Am. Fl. 227: 86. 1906. 
