Saxifraga oppositifolia |
Saxifraga serpyllifolia |
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purple mountain saxifrage, purple or purple mountain saxifrage, purple saxifrage, saxifrage à feuilles opposées, twinflower saxifrage |
thyme-leaf saxifrage |
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Habit | Plants mat- or cushion-forming (with trailing, ± woody stems), not stoloniferous, rhizomatous. | Plants mat-forming, not stoloniferous, rhizomatous. | ||||
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, (cauline 1–4); petiole absent; blade linear (cauline) or oblong to oblanceolate or spatulate, unlobed, 2–8.5 mm, fleshy, margins (recurved), entire, eciliate, apex obtuse, not mucronate, surfaces glabrous or glabrate. |
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Inflorescences | solitary flowers, ebracteate, 1–5 cm, glabrate or sparsely purple-tipped stipitate-glandular. |
solitary flowers, 2–7 cm, sparsely to densely pink- to purple-tipped stipitate-glandular; 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 erect to spreading (reflexed in fruit, often purplish), broadly ovate to elliptic, margins eciliate or sometimes sparsely ciliate, surfaces glabrous; petals pale yellow, rarely purple, faded when dried, not spotted, elliptic to obovate, 4–8 mm, longer than sepals; ovary superior. |
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Capsules | ± folliclelike. |
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2n | = 16 (Russia). |
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Saxifraga oppositifolia |
Saxifraga serpyllifolia |
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Phenology | Flowering summer. | |||||
Habitat | Moist to dry sandy areas, cliffs, gravelly ridges, scree, tundra | |||||
Elevation | 0-2200 m [0-7200 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; NT; NU; YT; Asia (Japan, Siberia) |
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Discussion | Subspecies 7 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
The purple-flowered variant of Saxifraga serpyllifolia has been called var. purpurea. (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. 139. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | S. serpyllifolia var. purpurea | |||||
Name authority | Linnaeus: Sp. Pl. 1: 402. 1753 , | Pursh: Fl. Amer. Sept. 1: 310. 1813 , | ||||
Web links |
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