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Matted saxifrage, saxifraga vespertina, spotted saxifrage, yellow dot saxifrage

saxifrage cespiteuse, tuft alpine saxifrage, tuft or tuft alpine saxifrage, tuft saxifrage

Habit Plants forming loose mats, (stems trailing), not stoloniferous, rhizomatous. Plants densely cushion- to loosely mat-forming, (stems trailing), not stoloniferous, not rhizomatous, with ± woody caudex.
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 proximal cauline, (marcescent, crowded);

petiole flattened, 2–6(–12) mm;

blade elliptic to obovate or spatulate, 3(–5)-lobed apically (lobes oblong-elliptic), 4–15(–25) mm, ± fleshy, margins entire, sparsely short glandular-ciliate (mostly proximally), (nonsecreting hydathodes present adaxially at each lobe apex), apex obtuse, surfaces sparsely to densely short stipitate-glandular.

Inflorescences

3–6-flowered cymes, 2.5–12 cm, pink- to purple-tipped stipitate-glandular;

bracts sessile.

2–5-flowered cymes, sometimes solitary flowers, to 2–15(–20) cm, densely clear- or cream- to pinkish yellow-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 to spreading, triangular or ovate to elliptic, margins stipitate-glandular, surfaces stipitate-glandular;

petals white, proximally greenish to yellowish tinged, not spotted but sometimes striate, elliptic or oblanceolate to obovate, (1.5–)3–7(–15) mm, equaling or longer than sepals;

ovary inferior.

2n

= 26.

= 78, 80.

Saxifraga vespertina

Saxifraga cespitosa

Phenology Flowering summer. Flowering summer.
Habitat Rocky slopes, ledges, crevices Rock outcrops, crevices, talus, scree slopes, rocky tundra, fellfields, nunataks, stream banks
Elevation 100-1800 m (300-5900 ft) 0-4500 m (0-14800 ft)
Distribution
from FNA
OR; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC; MB; NL; NT; NU; ON; QC; YT; Greenland; Europe; Asia (Siberia)
[WildflowerSearch map]
Discussion

The North American representatives of Saxifraga cespitosa are very variable. It seems futile at this time to recognize any of the infrapecific taxa that have been described, although five are frequently distinguished as either subspecies or varieties. Expressions of all of the purported distinguishing characters overlap or have little apparent geographic or ecologic correlation. The only Southern Hemisphere representatives of Saxifraga are closely related to S. cespitosa. Reports of S. rosacea Moench from southern Greenland are misidentifications of this species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 8, p. 142. FNA vol. 8, p. 146.
Parent taxa Saxifragaceae > Saxifraga Saxifragaceae > Saxifraga
Sibling taxa
S. adscendens, S. aizoides, S. aleutica, S. bracteata, S. bronchialis, S. cernua, S. cespitosa, S. cherlerioides, S. chrysantha, S. debilis, S. eschscholtzii, S. flagellaris, S. hirculus, S. hyperborea, S. mertensiana, S. nathorstii, S. oppositifolia, S. paniculata, S. radiata, S. rivularis, S. serpyllifolia, S. taylorii, S. tricuspidata, S. tridactylites
S. adscendens, S. aizoides, S. aleutica, S. bracteata, S. bronchialis, S. cernua, S. cherlerioides, S. chrysantha, S. debilis, S. eschscholtzii, S. flagellaris, S. hirculus, S. hyperborea, S. mertensiana, S. nathorstii, S. oppositifolia, S. paniculata, S. radiata, S. rivularis, S. serpyllifolia, S. taylorii, S. tricuspidata, S. tridactylites, S. vespertina
Synonyms Leptasea vespertina, S. bronchialis subsp. vespertina, S. bronchialis var. vespertina Muscaria delicatula, Muscaria micropetala, Muscaria monticola, S. cespitosa subsp. decipiens, S. cespitosa var. emarginata, S. cespitosa subsp. exaratioides, S. cespitosa subsp. laxiuscula, S. cespitosa var. lemmonii, S. cespitosa var. minima, S. cespitosa subsp. monticola, S. cespitosa subsp. sileneflora, S. cespitosa subsp. subgemmifera, S. cespitosa var. subgemmifera, S. cespitosa subsp. uniflora
Name authority (Small) Fedde: Just’s Bot. Jahresber. 33(1): 613. (1906) Linnaeus: Sp. Pl. 1: 404. 1753 ,
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