Comprehensive Description
provided by North American Flora
Tiarella unifoliata
Add to the illustrations: Brown & Schaffer, Alp. Fl. Can. pi. 40, f. 1.
1 19. Bolandra oregana.
Extend the given distribution to western Idaho.
- bibliographic citation
- Per Axel Rydberg. 1918. ROSACEAE (conclusio). North American flora. vol 22(6). New York Botanical Garden, New York, NY
Comprehensive Description
provided by North American Flora
Tiarella unifoliata Hook. Fl. Bor. Am. 1 : 238. 1832
Petalosteira unifoliata Raf. Fl. Tell. 2 : 74. 1836.
Tiarella trifoliata unifoliata Kurtz, Bot. Jahrb. 19 : 378. 1894.
Perennial with a cespitose rootstock, acaulescent; flowering branches 1.5-4 dm. high, glabrous or viscid-puberulent above, or slightly hirsute. 1-4-leaved ; petioles of basal leaves 0.5-1.5 dm. long, glabrous or slightly hirsute; blades broadly cordate, sparingly hirsute or in age glabrate, 4-10 cm. wide, coarsely 3-5-lobed, with broadly ovate acute lobes, doubly crenate with mucronate teeth ; leaves of the flowering branches similar but with shorter petioles ; inflorescence a narrow panicle; sepals whitish, ovate-oblong, about 1.5 mm. long; the linear-subulate white petals and the stamens fully 3 times as long ; carpels oblong, acutish, the longer 9-11 mm., the shorter 5-6 mm. long.
Type locality : Height of land in the Rocky Mountains, near the source of the Columbia. Distribution : Shaded ravines and woods, from Alberta and British Columbia to Idaho and northern California.
- bibliographic citation
- John Kunkel SmaII, Per Axel Rydber, Nathaniel Lord Britton, Percy Wilson, Henry Hurd Rusby. 1905. ROSALES, PODOSTEMONACEAE, CRASSULACEAE, PENTHORACEAE and PARNASSIACEAE. North American flora. vol 22(2). New York Botanical Garden, New York, NY
