eewaiaa) SAXIFRAGACER. 191 
S. cherlerioides D. Don Monogr. Saxifr. 382. S. bronchialis var. 
cherlerioides Engler. Cespitose, with many creeping branches and short 
branchlets forming dense masses 6-18 inches in diameter: leaves spatu- 
late, rounded or obtuse and cuspidate at the apex, finely ciliate, 1-% lines 
long, crowded on the short branchlets: flowering stems 2-4 inches long; 
flowers white, in a loose open cyme on slender pedicels; sepals nearly dis- 
tinct, ovate, obtuse, glabrous, a line long; petals oblong-obovate, 3- 
nerved, thrice longer than the sepals; styles connivent in flower. On 
rocky slopes along the Columbia river near the Cascade falls. 
S. tricuspidata Ritz. Prodr. Fl. Scand. ed. 2, 104. Stems erect, thick, 
2-3 inches high: leaves densely imbricated below, thick-coriaceous, 3- 
cuspidate, with cartilaginous points, the margins very slightly ciliate: 
flowers somewhat corymbose, on short stout pedicels; sepals ovate, some- 
what coriaceous; petals obovate-oblong, longer than the sepals: capsule 
ovoid, apiculate with the conical divergent styles. Arctic America: said 
to have been found on Mount Hood. 
§ 2 DacrynormpEs: Tausch |]. ec. Caudex perennial, leafy: 
leaves persistent, the margins not punctate nor cartilaginous: 
flowering stems annual, somewhat leafy: sepals united at base 
and coherent with the base of the ovary: cilie of the leaves 
articulated. 
S. cwspitosa L. Sp. 404 (?). Cespitose, the slender running stems 
and short branchlets forming dense tufts 6-16 inches in diameter: leaves 
pale or yellowish, thin, pubescent, spatulate, 2-5-cleft or entire, the seg- 
ments usually obtuse, closely imbricate on the short branchlets, persist- 
eat, flowering stems slender, 2-6 inches high, glandular, 1-5-flowered: 
calyx cleft to the middle, with oblong acute lobes; petals white. 3-5 lines 
long, oblong, 3-nerved, rounded above, twice as iong as the calyx: cap- 
sule open only at the top the slender beaks but slightly: diverging. On 
cliffs and rocky slopes, along the Columbia river near the Cascade falls. 
S. Tolmei T. « G. FI. i, 567. Cespitose with leafy running diffusely 
branching stems, forming dense tufts 4-20 inches in diameter: leaves suc- 
culent, nearly terete when young, glabrous, sometimes sparingly ciliate 
near the base, 4-6 lines long, clavate, obtuse, closely imbricated on the 
slender branches, persistent: flowering stems scape-like, 2-4 inche: high, 
1-1-flowered; sepals ovate, 3-nerved, about 2 lines long; petals white, nar- 
rowly lanceolate, unguiculate, 3-nerved, longer than the sepals; capsule 
large, 4-5 lines long, ovoid, united only at the base, the acute beaks di- 
verging, sometimes abnormally 3-4-celled. In sand along rivulets on the 
higiest mountains near perpetual snow. Brit. Columbia to California. 
§ 3 Hypartica Tausch. l.c. Caudex perennial, commonly 
subterranean; stems or scapes annual; calyx nearly free from 
the ovary; sepals almost distinct, reflexed; filaments more or 
less dilated upward. 
* Leaves all clustered at the crown of a ligneous more or less 
creeping caudex. 
S Lyalli Engler Index Crit. Saxifr. 3). Glabrous: caudex creeping and 
sparingly branched: leaves obovate, attenuate below to a margined petiole, 
coarsely toothed at the summit. 6-12 lines long: stems erect, slender, 6-12 
inches high, 6-10-flowered; calyx parted nearly or quite to the base, the 
ovate acute segments soon reflexed, 2 iines long; petals round-obovate, 
subunguiculate, l-nerved, but little if any longer than the sepals; fila- 
ments flat, broadest in the middle: capsule united only at the base, rarely 
3-+-celled, the beaks erect. Along streams, northern Idaho to Brit. 
Columbia and the arctic Coast. . 
