Saxifraga serpyllifolia |
Saxifraga bracteata |
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thyme-leaf saxifrage |
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Habit | Plants mat-forming, not stoloniferous, rhizomatous. | Plants solitary or in usually loose tufts, not stoloniferous, weakly rhizomatous, (with bulbils). |
Leaves | 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. |
basal and cauline; petiole ± flattened, 10–70 mm, (± hairy); blade reniform, 5–7(–11)-lobed (lobes obtuse, sometimes acute), (5–)7.4–11.2(–20) mm, slightly fleshy, margins entire, sparsely glandular-ciliate or eciliate, apex rounded to obtuse, surfaces glabrous or sparsely short stipitate-glandular. |
Inflorescences | solitary flowers, 2–7 cm, sparsely to densely pink- to purple-tipped stipitate-glandular; bracts sessile. |
2–6(–29)-flowered, capitate thyrses, sometimes solitary flowers, (flowers subsessile), (3–)5–15(–18) cm, densely tangled, reddish brown-hairy; bracts (5–10), petiolate, (3–7-lobed, densely surrounding inflorescence). |
Flowers | 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. |
(hypanthium U-shaped in longisection); sepals erect, oblong to ovate, margins ± glandular-ciliate, surfaces glabrous or sparsely short stipitate-glandular; petals white, not spotted, ± broadly elliptic to obovate, 2–5(–6.5) mm, ± equaling sepals; ovary ca. 1/2 inferior. |
2n | = 16 (Russia). |
= 26 (Russian Far East). |
Saxifraga serpyllifolia |
Saxifraga bracteata |
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Phenology | Flowering summer. | Flowering summer. |
Habitat | Moist to dry sandy areas, cliffs, gravelly ridges, scree, tundra | Rocky ledges and slopes, coastal |
Elevation | 0-2200 m (0-7200 ft) | 0-500 m (0-1600 ft) |
Distribution |
AK; NT; NU; YT; Asia (Japan, Siberia) |
AK; e Asia (n Japan, Russian Far East) |
Discussion | 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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Source | FNA vol. 8, p. 139. | FNA vol. 8, p. 143. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | S. serpyllifolia var. purpurea | S. laurentiana, S. rivularis var. laurentiana, S. vaginata |
Name authority | Pursh: Fl. Amer. Sept. 1: 310. 1813 , | D. Don: Trans. Linn. Soc. London 13: 367. (1822) |
Web links |