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thyme-leaf saxifrage

east Greenland saxifrage

Habit Plants mat-forming, not stoloniferous, rhizomatous. Plants loosely mat-forming, not stoloniferous, rhizomatous, from caudex.
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.

cauline, (not imbricate), opposite (distalmost alternate);

petiole absent;

blade oblanceolate to elliptic, unlobed, 5–9 mm, fleshy, margins entire, ciliate, with 1(–3) lime-secreting hydathodes, apex obtuse, surfaces glabrous.

Inflorescences

solitary flowers, 2–7 cm, sparsely to densely pink- to purple-tipped stipitate-glandular;

bracts sessile.

solitary flowers, sometimes 2-flowered cymes, ebracteate, 3–4 cm, glabrate.

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.

sepals erect, ovate, margins ciliate, surfaces glabrous;

petals salmon to flesh colored, sometimes red or orange, rarely yellow, sometimes violet tinged, not spotted, obovate to oblanceolate, 12–15 mm, longer than sepals;

ovary to 1/4 inferior.

2n

= 16 (Russia).

= 52.

Saxifraga serpyllifolia

Saxifraga nathorstii

Phenology Flowering summer. Flowering summer.
Habitat Moist to dry sandy areas, cliffs, gravelly ridges, scree, tundra Arctic marshes, damp tundra, alluvial river beds, dessicated ponds, inland nunataks
Elevation 0-2200 m (0-7200 ft) 0-1200 m (0-3900 ft)
Distribution
from FNA
AK; NT; NU; YT; Asia (Japan, Siberia)
[BONAP county map]
from USDA
Greenland
[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.)

Saxifraga nathorstii is known only from northeastern Greenland. T. W. Böcher (1941) showed cytologically that this species may be an allopolyploid that originated as a hybrid between S. oppositifolia and S. aizoides; morpho-logically, phenologically, and ecologically, it is intermediate between the two species (see also T. J. Sørensen 1933).

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

Source FNA vol. 8, p. 139. FNA vol. 8, p. 136.
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. bracteata, S. bronchialis, S. cernua, S. cespitosa, S. cherlerioides, S. chrysantha, S. debilis, S. eschscholtzii, S. flagellaris, S. hirculus, S. hyperborea, S. mertensiana, S. oppositifolia, S. paniculata, S. radiata, S. rivularis, S. serpyllifolia, S. taylorii, S. tricuspidata, S. tridactylites, S. vespertina
Synonyms S. serpyllifolia var. purpurea S. oppositifolia var. nathorstii
Name authority Pursh: Fl. Amer. Sept. 1: 310. 1813 , (Dusén) Hayek: Denkschr. Kaiserl. Akad. Wiss., Wein. Math.-Naturwiss. Kl. 77: 661. 1905 (as nathorsti),
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