SAXIFRAGE FAMILY 377 



long, obtuse or acutish, with a cordate base, shallowly lobed, the lobes crenate or crenate- 

 serrate in outline, these again crenate or crenate-serrate, the whole blade covered with scat- 

 tered, rather coarse, whitish and somewhat curved hairs, 3-6 cm. long and 2-4 cm. wide ; petioles 

 densely ferruginous-hirsute with strongly deflexed hairs, 3-9 cm. long; flowers yellowish green; 

 hypanthium with the sepals 2-3 mm. broad. 



In wet places, Humid Transition Zone; in the coastal region from British Columbia to Marin County, Cali- 

 fornia. Type locality: Mendocino County, California. April-May. 



18. OZOMELIS Raf. Fl. Tell. 2:73. 1836. 



Perennials with scaly rootstocks and lateral, mostly scapiform flowering shoots. Leaves 

 basal, long-petioled, with rounded-reniform or cordate blades. Inflorescence racemose. 

 Hypanthium campanulate, adnate to the ovary for not more than half its length. Sepals 5, 

 lance-ovate, ovate or oblong, erect, thin and petaloid, about equaling or shorter than the 

 hypanthium, valvate in the bud. Petals 5 (rarely lacking), 3-cleft, toothed or entire. 

 Stamens 5, opposite the sepals; filaments very short, erect; anthers reniform. Ovary 

 half-inferior or more, 1-celled with 2 parietal many-ovuled placentae; styles 2, short; 

 stigmas capitate, entire. [The significance of the name is obscure.] 



A genus of about 5 species, natives of western North America. Type species, Ozomelis trifida (Graham) 

 Rydb. 



Leaves cordate to rounded-reniform, not angularly lobed, all basal. 



Petals cuneate with a long narrow claw, digitately trifid at the apex into broadened subequal divisions. 



1. O. trifida. 



Petals filiform and trisected just above the middle into filiform divaricate divisions. 2. O. stauropetala. 



Leaves cordate-triangular, angularly lobed; one cauline leaf usually present. 3. O. diversifolia. 



1. Ozomelis trifida (Graham) Rydb. Pacific Ozomelis. Fig. 2286. 



Mitella trifida Graham, Edinb. New Phil. Journ. 1829: 185. 1829. 



Ozomelis varians Raf. Fl. Tell. 2: 73. 1836. 



Mitellopsis Hookeri Meisn. PI. Vase. Gen. Comm. 100. 1838. 



Mitellopsis trifida Walp. Rep. 2: 370. 1848. 



Ozomelis trifida Rydb. N. Amer. Fl. 22: 95. 1905. 



Ozomelis pacifica Rydb. loc. cit. 



Sparsely hirsute acaulescent perennial from a semi-erect or creeping rootstock. Leaf-blades 

 cordate or round-reniform, minutely glandular-ciliate, 2-5 cm. wide, crenately lobed, the lobes 

 crenate-serrate, glandular-apiculate-toothed, sparingly hirsute on both sides with conspicuous 

 hairs ; petioles sparingly retrorse-hirsute to densely so above, 3-9 cm. long ; scapes 1 to several, 

 erect, glandular-scabrous, sometimes bracteate, 1.5-4.5 dm. high; racemes 5-20-flowered; pedi- 

 cels 1 mm. or less long, subtended by small pinkish fimbriate bracts; hypanthium turbinate- 

 campanulate, comparatively glabrate, including the sepals about 3 mm. long; sepals erect, 

 whitish, often pink- or violet-tinged, oblong to ovate, acute and often slightly mucronate; 

 petals half again as long as the sepals, white, only slightly spreading; ovary half inferior; styles 

 thick; stigmas capitate. 



Damp mountain woods, Humid Transition and Canadian Zones; British Columbia east to Alberta and south 

 to Trinity and Plumas Counties, California. Type locality: Rocky Mountains, near Smoky River, on the east 

 side, near latitude 56°. May- Aug. 



Ozomelis micrantha (Piper) Rydb. N. Amer. Fl. 22: 96. 1905. {Mitella micrantha Piper, Erythea 7: 

 162 1899 ) Known only from the original collection at Fort Colville, Washington. It is a very small-flowered 

 form, distinguished principally by the possession of oblanceolate, entire and acuminate petals. 



2. Ozomelis stauropetala (Piper) Rydb. Cross-shaped Ozomelis. Fig. 2287. 



Mitella stauropetala Piper, Erythea 7: 161. 1899. 

 Ozomelis stauropetala Rydb. N. Amer. Fl. 22: 95. 1905. 



More or less hirsute acaulescent perennial from a creeping, rather slender rootstock. 

 Leaves cordate to rounded-reniform, sparsely appressed-hirsute on both sides, mostly obscurely 

 5-7-lobed, the lobes broadly crenate to more finely crenate-serrate, glandular-cihate, 2.5-7 cm. 

 broad; petioles 4-12 cm. long, retrorsely hirsute and minutely glandular, especially above; 

 scapes' 1-6 erect, slender, bearing a few scarious fimbriate bracts, minutely scabrous and often 

 hirsute toward the base, glandular-puberulent above, 2.5-5 dm. high; racemes mostly secund 

 10-35-flowered, 6-20 cm. long; pedicels 1 mm. long, subtended by minute, acuminate and 

 lacerate bracts- hypanthium turbinate-campanulate, about 2 mm. long; sepals oblong-ovate, 

 whitish often purple-tinged, as long as or slightly longer than the hypanthium usually ascend- 

 ing- petals white, often purplish toward the apex, filiform, trisected just above the middle, 

 spreading, fully twice as long as the sepals ; anthers oblong, white or purple, nearly sessile. 



In moist woods and springy places, Canadian and Hudsonian Zones; western Montana to Colorado, westward 

 and southward to the mountains of eastern Washington and Oregon. Type locality: Craig Mountains, Nez Perces 

 County, Idaho. May-July. 



3. Ozomelis diversifolia (Greene) Rydb. Varied-leaved Ozomelis. Fig. 2288. 



Mitella diversifolia Greene, Pittonia 1: 32. 1887. 

 Ozomelis diversifolia Rydb. N. Amer. Fl. 22: 94. 1905. 



Minutely scabrous perennial from a creeping rhizome. Basal leaves triangular-cordate with 

 a mostly acute tip, angularly lobed, irregularly crenate-serrate, glandular-cihate and glandular- 

 puberulent on both sides, with a few strigose hairs on the upper surface, 4-5 cm. wide and 



