SAXIFRAGE FAMILY 



121 



Kefs. — Saxlpraga CALrpoRNiCA Greene, Pitt. 1:286 (1889), type loe. Mission Hilla, San 

 Francisco, Greene. Micranthes calif ornica Small, N. Am. Fl. 22:140 (1905). S. virginiensis 

 Bol. Cat. PI. S. F. 11 (1870) ; B. & W. Bot. Cal. 1:194 (1876). S. virginiensis L. var. calif ornica 

 Jepson, Fl. W. Mid. Cal. 268 (1901), ed. 2. 198 (1911), Man. 456 (1925). S. virginiensis L. 

 var. napensis Jepson, Man. 456 (1925). S. napensis Small, Bull. Torr. Club 25:316 (1898), type 

 loc. Napa Valley, Bigelow, Thurber 496, "corolla white". Micranthes napensis Small, N. Am. 

 Fl. 22:140 (1905), the flower said in this work to be without corolla, but perhaps the petals 

 had fallen. 



6. S. marshallii Greene. Hupa Saxifrage. Plants 4 to 12 inches high; scape 

 and leaves from a short caudex; leaf -blades oblong or ovate, rather coarsely den- 

 tate, 1/4 to 11/2 inches long, on petioles about as long. 



Montane, 5000 to 7000 feet : Humboldt and Siskiyou Cos. North to southern 

 Oregon. May-June. 



Locs. — Trinity Summit; Marble Valley, Siskiyou Co., Butler 24. Oregon: Woodville, Howell. 



Eefs. — Saxifraga marshallii Greene, Pitt. 1:159 (1888), type collected by C. C. Marshall 

 on Supply Creek, w. of Hupa Valley, at considerable altitude, not far below the snow, Humboldt 

 Co., ace. J. P. Tracy in litt. Jan. 14, 1935, not "Hupa Valley" as stated by Greene ; Jepson, Man. 

 456 (1925). Micranthes marshallii Small, N. Am. Fl. 22:145 (1905). 



7. S. riviilaris L. Pigmy Saxifrage. (Fig. 148.) Plants i^ to 2 inches 

 high, the leaves mainly basal; stems erect, nearly twice as long as the basal leaves, 

 1 or 2 (to 5) -flowered, bearing one (or few) scattered leaves; herbage minutely 

 glandular-puberulent save the upper side of 

 the leaves; blades of basal leaves 1 to 3 lines 

 wide, somewhat reniform in outline, 3-lobed, 

 the lobes broad, subobtuse, the petioles 4 to 12 

 lines long; cauline leaves mostly sessile, entire 

 or slightly lobed; flowers 2 lines long; petals 

 oblong; tips of capsule widely divergent. 



Wet and shady places under rocks, 11,500 

 feet : southern Sierra Nevada in Inyo Co. East 

 to New Hampshire, north to Alaska and Green- 

 land. Europe, Asia. Aug. 



Loc. — Euby Lake, Rock Creek, Peirson 10,765. 



Eef. — Saxifraga rivxilaris L. Sp. PI. 404 (1753), 

 type loc. Lapland. 



8. S. punctata L. var. arguta Engl. & Irm. 

 Brook Saxifrage. Plants 9 to 18 inches high, 

 scape and leaves from a short creeping root- 

 stock; herbage glabrous or somewhat pubes- 

 cent; leaf -blades reniform to round-cordate, 

 almost equally dentate, % to 2^/2 inches broad; 

 petioles 2 to 6i/^ inches long; panicle open, nar- 

 row; calyx-lobes closely reflexed. 



Along brooks, 7000 to 10,300 feet : San Ber- 

 nardino Mts. ; Sierra Nevada from Tulare Co. 

 to Lassen Peak; Yollo Bolly Mts. to Trinity 

 Mts. North to Alaska. 



Note on the flower. — The white petals have two yellow dots near the base of the orbicular 

 limb. The stamen-filaments are clavate. The purple upper half of the ovary is sharply defined 

 from the whitish part below. 



Locs.— San Bernardino Mts.: San Gorgonio Peak (n. base), C. M. Wilder. Sierra Nevada: 

 Farewell Gap, Purpus 5252; Ruby Lake, nw. Inyo Co., ace. Peirson; Home Camp Creek, Hunt- 

 ington Lake, A. L. Grant 1419; Rancheria Mt., Jepson 4599; Tilden Lake, Tuolumne Co., Jepson 

 4546; Sonora Pass, A. L. Grant 300; Coldstream, Placer Co., Sonne 91. Coast Ranges: South 

 Yollo Bolly, Jepson 13,479; Marble Valley, Siskiyou Co., Butler 222. Ore.: Ashland Butte, 

 Jepson 2572. 



Fig. 148. 

 habit, X 1; 

 capsule, X 



Saxitraga rivularis L. 

 h, long. sect, of fl., X 4; 



