Saxifraga oppositifolia |
Saxifraga hirculus |
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purple mountain saxifrage, purple or purple mountain saxifrage, purple saxifrage, saxifrage à feuilles opposées, twinflower saxifrage |
saxifrage oeil-de-bouc, yellow marsh saxifrage |
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Habit | Plants mat- or cushion-forming (with trailing, ± woody stems), not stoloniferous, rhizomatous. | Plants loosely tufted, not stoloniferous or sometimes shortly so, rhizomatous, caudex present or not. | ||||
Leaves | cauline (marcescent, crowded), opposite (rarely alternate); petiole absent; blade oblong to ± broadly obovate, unlobed, 2–5 mm, leathery, margins entire, bristly-ciliate, with 1(–3) lime-secreting hydathodes (in pit, secretion obvious), apex obtuse, surfaces glabrous. |
basal and cauline, (distal clasping); petiole absent on distal leaves, otherwise ± flattened, 3–20(–35) mm; blade linear or linear-oblanceolate to spatulate, unlobed, (5–)10–30 mm, thin to slightly fleshy, margins entire, eciliate or sparsely reddish brown-ciliate, (with apical nonsecreting hydathode), apex acuminate or acute, surfaces glabrous or sparsely reddish brown-villous. |
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Inflorescences | solitary flowers, ebracteate, 1–5 cm, glabrate or sparsely purple-tipped stipitate-glandular. |
2(–4)-flowered cymes, sometimes solitary flowers, (flowers initially nodding), 4–30(–35) cm, sparsely to ± densely reddish brown-villous; bracts sessile. |
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Flowers | sepals erect, ovate, margins stiffly ciliate or not, surfaces hairy, stipitate-glandular, or glabrous; petals purple to pink, rarely white, often drying violet, not spotted, obovate to elliptic, (2–)5–12(–20) mm, longer than sepals; ovary ± superior. |
sepals ascending to spreading, reflexed in fruit, (sometimes purplish), triangular, margins reddish brown-ciliate, surfaces glabrous (rarely reddish brown-hairy); petals yellow, often drying cream, often proximally orange-spotted, elliptic to oblong or obovate, 6–18 mm, 2+ times longer than sepals; ovary superior. |
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Capsules | ± folliclelike. |
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2n | = 16, 24, 32. |
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Saxifraga oppositifolia |
Saxifraga hirculus |
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Phenology | Flowering summer. | |||||
Habitat | Wet, usually mossy, arctic or alpine tundra, wet alpine meadows | |||||
Elevation | 0-4000 m [0-13100 ft] | |||||
Distribution |
AK; CO; ID; MT; NY; OR; VT; WA; WY; AB; BC; MB; NS; NT; NU; ON; QC; YT; Eurasia; arctic and alpine
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AK; CO; MT; NM; UT; BC; MB; NT; NU; ON; QC; YT; Greenland; Eurasia; Atlantic Islands (Iceland, Spitsbergen)
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Discussion | Subspecies 7 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
On the basis of a morphologic and cytologic study, O. Hedberg (1992) recognized four subspecies in Saxifraga hirculus: subsp. propinqua (2n = 16, 24), nearctic (Labrador and northwestern Greenland to Alaska); subsp. coloradoensis (2n = 16), Colorado; subsp. hirculus (2n = 32), circumboreal (Ontario to Alaska in North America); and subsp. compacta (2n = 32), mostly Arctic Eurasia, Atlantic Islands (Iceland, Spitsbergen), eastern Greenland, and Alaska. Nonetheless, we are not recognizing subspecies (see also P. K. Holmgren and N. H. Holmgren 1997); further research is needed to determine their validity. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 8, p. 136. | FNA vol. 8, p. 138. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Hirculus prorepens, Leptasea hirculus, S. hirculus subsp. coloradensis, S. hirculus subsp. compacta, S. hirculus subsp. propinqua, S. hirculus var. propinqua | |||||
Name authority | Linnaeus: Sp. Pl. 1: 402. 1753 , | Linnaeus: Sp. Pl. 1: 402. 1753 , | ||||
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