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Palmer's saxifrage

storm saxifrage

Habit Plants solitary or in clumps, with bulbils on caudices. Plants solitary or in groups, with bulbils on caudices.
Leaves

basal;

petiole flattened, 1–9 cm;

blade ovate to elliptic, 2–8 cm, slightly fleshy, base attenuate, margins entire or subentire, ciliate, surfaces tangled, reddish brown-hairy.

basal;

petiole indistinct (leaves appearing sessile), flattened, 2–8+ mm;

blade oblanceolate to obovate, 4–10(–30) mm, fleshy, base cuneate to attenuate, margins entire or minutely denticulate, eciliate, (apex acute to obtuse or rounded), surfaces ± glabrous; (venation pinnate or palmate).

Inflorescences

30+-flowered, (flowers sometimes almost secund), very open, lax thyrses, 6–50 cm, hairy proximally, densely so distally.

5–15(–20)-flowered, congested thyrses, 3–10(–15) cm, glabrous or sparsely purple-tipped stipitate-glandular.

Flowers

sepals erect to ascending, ovate to triangular;

petals white, not spotted, broadly oblong to elliptic, not clawed, 3–6 mm, 2+ times as long as sepals;

filaments linear, flattened;

pistils distinct almost to base;

ovary ± superior, (to 1/3 adnate to hypanthium).

sepals spreading, ovate;

petals white, not spotted, linear to obovate, clawed, to 1.5 mm, shorter than sepals;

filaments linear, flattened;

pistils connate to 1/2 their lengths;

ovary inferior.

Capsules

green with reddish or purplish tinge, or reddish purple, folliclelike.

reddish purple, valvate.

2n

= 10.

Micranthes palmeri

Micranthes tempestiva

Phenology Flowering spring. Flowering summer.
Habitat Rocky, open woodlands Rocky ledges, slopes, or snow-bed meadows
Elevation 100-1000 m (300-3300 ft) 2400-3200 m (7900-10500 ft)
Distribution
from FNA
AR; OK
[BONAP county map]
from FNA
MT
[BONAP county map]
Discussion

Of conservation concern.

Micranthes tempestiva is known only from the Bitterroot Mountains and Anaconda Range.

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

Source FNA vol. 8, p. 61. FNA vol. 8, p. 69.
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. 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. tolmiei, 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. pensylvanica, M. petiolaris, M. razshivinii, M. reflexa, M. rhomboidea, M. rufidula, M. spicata, M. stellaris, M. subapetala, M. tenuis, M. texana, M. tischii, M. tolmiei, M. unalaschcensis, M. virginiensis
Synonyms Saxifraga palmeri, Saxifraga virginiensis var. subintegra Saxifraga tempestiva
Name authority Bush: Amer. Midl. Naturalist 11: 221. 1928 , (Elvander & Denton) Brouillet & Gornall: J. Bot. Res. Inst. Texas 1: 1021. 2007 ,
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