Saxifraga tricuspidata |
Saxifraga taylorii |
|
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prickly saxifrage, saxifrage à trois dents, three-tooth saxifrage |
Taylor's saxifrage |
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Habit | Plants loosely mat-forming, (stems trailing), not stoloniferous, with elongate caudex or rhizomatous. | Plants loosely mat-forming, stoloniferous, rhizomatous. |
Leaves | cauline, (marcescent, crowded proximally); petiole absent; blade (often reddish), linear to cuneate, 1–3-lobed or -toothed apically (distal cauline unlobed), rarely all unlobed, (lobes long spinose-mucronate), 5–20 mm, leathery, margins entire, softly glandular-ciliate, (nonsecreting hydathodes present adaxially), apex acute, long spinose-mucronate, surfaces glabrous. |
cauline (crowded proximally); petiole absent; blade broadly obovate, prominently 3-lobed apically (distal unlobed, reduced), (lobes lanceolate to oblong, mucronate), 4.5–12 mm, ± leathery, margins entire, (cartilaginous), stiffly ciliate, apex acute, not or slightly mucronate, surfaces glabrous. |
Inflorescences | 3–10-flowered cymes, 4–10(–24) cm, white to sparsely pink- to purple-tipped stipitate-glandular; bracts sessile. |
2–4-flowered cymes, sometimes solitary flowers, 3.5–13 cm, glabrous except bracts purple-tipped stipitate-glandular; bracts sessile. |
Flowers | sepals erect to ascending, (sometimes purplish), triangular-ovate, margins ± glandular-ciliate, surfaces white to purple-tipped stipitate-glandular; petals white to cream, proximally to distally yellow-, orange-, and red-spotted, elliptic to ovate, 4–7 mm, much longer than sepals; ovary superior. |
sepals erect to ascending, (purplish), ovate to oblong, margins eciliate, surfaces glabrous; petals white to cream, not spotted, elliptic to obovate, 3.5–7 mm, much longer than sepals; ovary superior. |
2n | = 26. |
= 26, 52. |
Saxifraga tricuspidata |
Saxifraga taylorii |
|
Phenology | Flowering late spring–summer. | Flowering summer. |
Habitat | Open sandy, gravelly, or rocky sites, forest openings, grassy slopes, rocky ridges, stony tundra | Moist outcrops, rocky ledges, talus slopes |
Elevation | 0-3000 m (0-9800 ft) | 100-1000 m (300-3300 ft) |
Distribution |
AK; MI; AB; BC; LB; MB; NT; NU; ON; QC; SK; YT; Greenland
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BC |
Discussion | The rare, entire-leaved form of Saxifraga tricuspidata can be confused with S. bronchialis; it has glandular-ciliate margins instead of stiffly hooked-ciliate ones. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Saxifraga taylorii is known only from the Queen Charlotte Islands and northwestern Vancouver Island. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 142. | FNA vol. 8, p. 142. |
Parent taxa | ||
Sibling taxa | ||
Name authority | Rotbøll: Skr. Kiøbenhavnske Selsk. Laerd. Elsk. 10: 446. 1770 (as 3cuspidata) , | Calder & Savile: Brittonia 11: 248, figs. 6, 10–13. 1959 (as taylori) , |
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