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alpine saxifrage, Tolmie's alpine saxifrage, Tolmie's saxifrage

eastern swamp saxifrage, marsh, marsh saxifrage, Pennsylvania, Pennsylvania saxifrage, swamp saxifrage, swamp small-flower-saxifrage

Habit Plants mat-forming, (stems trailing, thin, basally slightly woody), with slender, woody caudices. Plants solitary or in groups, with thick, fleshy rhizomes.
Leaves

cauline, proximally crowded;

petiole absent;

blade elliptic-obovate, 0.8–1.5 cm, fleshy, base cuneate, margins entire, sometimes proximally sparsely long-ciliate, surfaces glabrous.

basal;

petiole indistinct, flattened, 3–10 cm;

blade linear or elliptic to ovate, 6–25 cm, fleshy, base attenuate, margins entire or subentire, ciliate, surfaces usually densely short-hairy, often tangled brown-hairy along proximal midveins.

Inflorescences

2–10-flowered, lax cymes, sometimes solitary flowers, 3–12 cm, glabrous or purplish- or pink-tipped stipitate-glandular; (bracts 1–3, proximal).

(30–)50+-flowered, open, often lax thyrses, 25–125 cm, purple-tipped stipitate-glandular.

Flowers

sepals erect to spreading, ovate;

petals white, not spotted, linear to oblanceolate, 2.5–5 mm, longer than sepals, short- or not clawed;

filaments broadly club-shaped (± petaloid);

pistils connate to 1/2 their lengths;

ovary ± superior (to 1/4 adnate to hypanthium).

sepals reflexed, triangular to ovate;

petals white to cream or rarely purple, not spotted, linear to narrowly elliptic, not clawed or slightly clawed, 2–3 mm, longer than sepals;

filaments linear, flattened;

pistils connate to 1/2 their lengths;

ovary 1/2+ inferior, appearing superior in fruit.

Capsules

green, purple mottled, valvate.

green, folliclelike.

2n

= 30.

= 56, 84, 112.

Micranthes tolmiei

Micranthes pensylvanica

Phenology Flowering summer. Flowering spring.
Habitat Arctic and alpine tundra, fell-fields Marshy meadows, mucky seepages in woods, swamp forests, montane bogs and seeps
Elevation 500-4000 m (1600-13100 ft) 100-1400 m (300-4600 ft)
Distribution
from FNA
AK; CA; ID; MT; NV; OR; UT; WA; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
CT; DE; IA; IL; IN; KY; MA; MD; ME; MI; MN; MO; NC; NH; NJ; NY; OH; PA; RI; TN; VA; VT; WI; WV; MB; ON; SK
[WildflowerSearch map]
[BONAP county map]
Discussion

Unlike those of most Micranthes species, the leaves of M. tolmiei are proximally cauline and the ovules have two integuments. The seeds have a loose, winglike testa.

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

Purple-petalled populations of Micranthes pensylvanica have been known as Saxifraga purpuripetala and are found in Maine, New York, Pennsylvania, and Vermont.

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

Source FNA vol. 8, p. 54. FNA vol. 8, p. 67.
Parent taxa Saxifragaceae > Micranthes Saxifragaceae > Micranthes
Sibling taxa
M. apetala, M. aprica, M. bryophora, M. californica, M. calycina, M. careyana, M. caroliniana, M. eriophora, M. ferruginea, M. foliolosa, M. fragosa, M. gaspensis, M. gormanii, M. hieraciifolia, M. hitchcockiana, M. howellii, M. idahoensis, M. integrifolia, M. lyallii, M. marshallii, M. micranthidifolia, M. nelsoniana, M. nidifica, M. nivalis, M. nudicaulis, M. occidentalis, M. odontoloma, M. oregana, M. palmeri, M. pensylvanica, M. petiolaris, M. razshivinii, M. reflexa, M. rhomboidea, M. rufidula, M. spicata, M. stellaris, M. subapetala, M. tempestiva, M. tenuis, M. texana, M. tischii, M. unalaschcensis, M. virginiensis
M. apetala, M. aprica, M. bryophora, M. californica, M. calycina, M. careyana, M. caroliniana, M. eriophora, M. ferruginea, M. foliolosa, M. fragosa, M. gaspensis, M. gormanii, M. hieraciifolia, M. hitchcockiana, M. howellii, M. idahoensis, M. integrifolia, M. lyallii, M. marshallii, M. micranthidifolia, M. nelsoniana, M. nidifica, M. nivalis, M. nudicaulis, M. occidentalis, M. odontoloma, M. oregana, M. palmeri, M. petiolaris, M. razshivinii, M. reflexa, M. rhomboidea, M. rufidula, M. spicata, M. stellaris, M. subapetala, M. tempestiva, M. tenuis, M. texana, M. tischii, M. tolmiei, M. unalaschcensis, M. virginiensis
Synonyms Saxifraga tolmiei, Saxifraga tolmiei var. ledifolia Saxifraga pensylvanica, M. pensylvanica var. purpuripetala, Saxifraga forbesii, Saxifraga pensylvanica var. forbesii, Saxifraga pensylvanica subsp. interior, Saxifraga pensylvanica var. purpuripetala, Saxifraga pensylvanica subsp. tenuirostrata, Saxifraga purpuripetala
Name authority (Torrey & A. Gray) Brouillet & Gornall: J. Bot. Res. Inst. Texas 1: 1022. 2007 , (Linnaeus) Haworth: Saxifrag. Enum., 45. (1821)
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