Saxifraga vespertina |
Saxifraga paniculata |
|
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Matted saxifrage, saxifraga vespertina, spotted saxifrage, yellow dot saxifrage |
saxifrage paniculée, White Mountain saxifrage |
|
Habit | Plants forming loose mats, (stems trailing), not stoloniferous, rhizomatous. | Plants forming cushionlike tufts, stoloniferous, rhizomatous. |
Leaves | cauline (crowded proximally); petiole absent; blade spatulate, unlobed or minutely 3-toothed or -lobed apically, 4–11 mm, leathery, margins entire, (not cartilaginous), stiffly ciliate, apex rounded or obtuse, mucronate, surfaces glabrous. |
basal and cauline; petiole absent; blade oblong to obovate, unlobed, [5–]8–35[–50] mm, leathery-fleshy, margins finely serrate (teeth whitish), proximally ciliate, with lime-secreting hydathode (secretions obvious), apex obtuse to ± acute, surfaces glabrous. |
Inflorescences | 3–6-flowered cymes, 2.5–12 cm, pink- to purple-tipped stipitate-glandular; bracts sessile. |
2–20-flowered, narrow, distally branched thyrses or cymes, sometimes solitary flowers, 6–40 cm, purple-tipped stipitate-glandular; bracts sessile. |
Flowers | sepals erect, ovate to oblong, margins sparsely ciliate, surfaces glabrous; petals white to cream, yellow-spotted proximally, red- or orange-spotted distally, these often faded in dried specimens, elliptic, 4–6 mm, much longer than sepals; ovary superior. |
sepals erect, (often reddish), oblong to ovate, margins eciliate, surfaces hairy; petals white to cream or pink, sometimes orange- or purple-spotted, elliptic to oblong or obovate, 3–6 mm, longer than sepals; ovary 1/2+ inferior. |
2n | = 26. |
= 28. |
Saxifraga vespertina |
Saxifraga paniculata |
|
Phenology | Flowering summer. | Flowering late spring–summer. |
Habitat | Rocky slopes, ledges, crevices | Rocky ledges and crevices, often calcareous areas |
Elevation | 100-1800 m (300-5900 ft) | 0-1200[-2200] m (0-3900[-7200] ft) |
Distribution |
OR; WA
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ME; MI; MN; NH; NY; VT; MB; NB; NL; NS; NT; NU; ON; QC; Greenland; Europe; Atlantic Islands (Iceland)
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Discussion | C. Reisch (2008) studied the phylogeography of Saxifraga paniculata. North American populations originated postglacially from refugia south of the ice. Reisch suggested that North American populations may belong to subsp. laestadii (Neuman) T. Karlsson, found also in Iceland and northern Norway. The Manitoba report originates from Clearwater Lake (R. Humphrey s.n., 13 Sept. 1993, WIN 62868), where shaded, cool, calcareous cliffs provide suitable habitats that also host other eastern disjuncts (B. A. Ford, pers. comm.). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 8, p. 142. | FNA vol. 8, p. 137. |
Parent taxa | Saxifragaceae > Saxifraga | Saxifragaceae > Saxifraga |
Sibling taxa | ||
Synonyms | Leptasea vespertina, S. bronchialis subsp. vespertina, S. bronchialis var. vespertina | S. aizoön, S. aizoön var. neogaea, S. paniculata subsp. laestadii, S. paniculata subsp. neogaea |
Name authority | (Small) Fedde: Just’s Bot. Jahresber. 33(1): 613. (1906) | Miller: Gard. Dict. ed. 8, Saxifraga no. 3. 1768 , |
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