Saxifraga mertensiana |
Saxifraga vespertina |
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Merten's or wood or woodland saxifrage, Mertens' saxifrage, wood saxifrage, woodland saxifrage |
Matted saxifrage, saxifraga vespertina, spotted saxifrage, yellow dot saxifrage |
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Habit | Plants solitary or in clumps, not stoloniferous, with caudex or short-rhizomatous. | Plants forming loose mats, (stems trailing), not stoloniferous, rhizomatous. |
Leaves | basal and cauline, (basal persistent, cauline ± inconspicuous); petiole rounded, 2–20 mm; blade round to reniform, irregularly shallowly lobed, 20–80(–100) mm, thin, margins serrate, stipitate glandular-ciliate, apex obtuse to rounded, surfaces sparsely hairy. |
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. |
Inflorescences | 30+-flowered, open, much-branched thyrses, usually some or all flowers replaced by bulbils (sometimes bulbils absent), 15–40 cm, dark purple-tipped stipitate-glandular; bracts (± inconspicuous), petiolate or sessile. |
3–6-flowered cymes, 2.5–12 cm, pink- to purple-tipped stipitate-glandular; bracts sessile. |
Flowers | sepals reflexed (at least in fruit), ovate to elliptic, margins eciliate, surfaces sparsely stipitate-glandular or glabrous; petals white, not spotted, narrowly ovate to elliptic, (3–)4–6 mm, longer than sepals; filaments strongly club-shaped; ovary superior. |
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. |
2n | = 36, ca. 48, 50. |
= 26. |
Saxifraga mertensiana |
Saxifraga vespertina |
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Phenology | Flowering spring–summer. | Flowering summer. |
Habitat | Moist to wet stream banks, mossy cliffs and slopes, waterfall spray zones | Rocky slopes, ledges, crevices |
Elevation | 0-2500 m (0-8200 ft) | 100-1800 m (300-5900 ft) |
Distribution |
AK; CA; ID; MT; OR; WA; AB; BC
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OR; WA
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Discussion | Plants of Saxifraga mertensiana bear bulbils in the axils of basal leaves. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 8, p. 146. | FNA vol. 8, p. 142. |
Parent taxa | Saxifragaceae > Saxifraga | Saxifragaceae > Saxifraga |
Sibling taxa | ||
Synonyms | S. mertensiana var. eastwoodiae | Leptasea vespertina, S. bronchialis subsp. vespertina, S. bronchialis var. vespertina |
Name authority | Bongard: Mém. Acad. Imp. Sci. St.-Pétersbourg, Sér. 6, Sci. Math. 2: 141. 1832 , | (Small) Fedde: Just’s Bot. Jahresber. 33(1): 613. (1906) |
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