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Saxifraga cernua L.  
Go To Encyclopedia of Life...
Family: Saxifragaceae
Nodding Saxifrage
[Saxifraga cernua var. exilioides Polunin, moreSaxifraga simulata]
Saxifraga cernua image
Dr. G Dallas and Margaret Hanna  
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  • Gleason & Cronquist
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Luc Brouillet, Patrick E. Elvander in Flora of North America (vol. 8)
Plants solitary or in tufts, not stoloniferous, weakly rhizom-atous, with small caudex. Leaves basal and cauline, (basal usually ephemeral, gradually dying through growing season, cauline conspicuous, reduced distally); petiole flattened, (5-)10-60(-90) mm; blade round to reniform, 3-7(-9)-lobed usually less than halfway to midvein (distal unlobed), (3-)5-18(-20) mm, slightly fleshy, margins entire, eciliate or sometimes sparsely glandular-ciliate, apex rounded, sometimes acute, surfaces glabrous or sparsely stipitate-glandular. Inflorescences 2(-5)-flowered paniculate or racemelike thyrses, sometimes solitary flowers, (flowers nodding in bud), some or all flowers but terminal one on each branch often replaced by bulbils, 3-30 cm, stipitate-glandular; bracts (proximal ephemeral), petiolate or sessile. Flowers: sepals erect, (sometimes reddish), oblong, margins glandular-ciliate, surfaces short-stipitate-glandular; petals white, not spotted, obovate to spatulate, 5-12 mm, longer than sepals; ovary superior. 2n = 24, 36, 48, 52, 56, 60, 70, 72. Flowering summer. Cool, wet areas, mossy banks, tundra, shady rock faces, late snowbeds; 0-4300 m; Greenland; Alta., B.C., Man., Nfld. and Labr. (Labr.), N.W.T., Nunavut, Ont., Que., Yukon; Alaska, Colo., Idaho, Minn., Mont., Nev., N.H., N.Mex., S.Dak., Utah, Wash., Wyo.; Eurasia. Saxifraga cernua plants rarely set seed; they bear bulbils among the basal leaves. Some reports of S. sibirica Linnaeus from Canada are misidentifications of this species.

Vascular plants of NE US and adjacent Canada
Rhizomatous; stems solitary or few, 8-20 cm; lower lvs long-petioled, the blade reniform in outline, 10-25 mm wide, 3-7-lobed; upper lvs progressively smaller, shorter-petioled, and fewer-lobed, the uppermost ovate, entire, some with small axillary bulblets; fl solitary, terminal, white; pet 6-10 mm; 2n=36-72. Circumboreal, s. to the Gasp顐enins. of Que., Mt. Washington (N.H.), n. Minn., and Colo. July.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
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Saxifraga cernua
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Dr. G Dallas and Margaret Hanna  
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The National Science Foundation
Developments of SEINet, Symbiota, and associated specimen databases have been supported by National Science Foundation Grants (DBI 9983132, BRC 0237418, DBI 0743827, DBI 0847966)