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thyme-leaf saxifrage

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

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
from FNA
AK; NT; NU; YT; Asia (Japan, Siberia)
[BONAP county map]
from FNA
AK; e Asia (n Japan, Russian Far East)
[BONAP county map]
Discussion

The purple-flowered variant of Saxifraga serpyllifolia has been called var. purpurea.

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

Source FNA vol. 8, p. 139. FNA vol. 8, p. 143.
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. taylorii, S. tricuspidata, S. tridactylites, S. vespertina
S. adscendens, S. aizoides, S. aleutica, 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. vespertina
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)
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