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Saddle Mountain saxifrage

Columbia saxifrage, meadow saxifrage, nesting saxifrage, peak saxifrage, swamp saxifrage

Gorman's saxifrage

Sierra saxifrage

Habit Plants solitary or in clumps, short-rhizomatous. Plants solitary or in clumps, with bulbils on caudices. Plants in groups or, sometimes, almost mat-forming, rhizomatous. Plants solitary, in clumps, or sometimes mat-forming, with bulbils on caudices, or rhizomatous.
Leaves

basal;

petiole often indistinct, flattened, 5–50 mm;

blade elliptic to obovate, 4–12 cm, slightly fleshy, base cuneate, margins serrate to dentate, densely ciliate, surfaces densely tangled-hairy.

basal;

petiole flattened, 1.5–5.5 cm;

blade ± ovate to elliptic, 3–6(–7.5) cm, fleshy, base attenuate, margins entire or minutely denticulate, ciliate, surfaces glabrate to sparsely hairy.

basal;

petiole flattened, 5–7.5 cm;

blade ovate to elliptic, 3–4 cm, fleshy, base attenuate, margins shallowly crenate-serrate, sparsely ciliate, surfaces tangled, reddish brown-hairy.

basal;

petiole flattened, 0.5–2 cm;

blade obovate to elliptic, 1.5–4 cm, fleshy, base attenuate, margins entire or apically denticulate, eciliate, surfaces glabrous or sparsely hairy.

Inflorescences

70+-flowered, open, lax, flat-topped thyrses, 15–35 cm, tangled, yellow-tipped stipitate-glandular.

30+-flowered, lax, cylindric thyrses with 3–10, ± compact cymules, 10–30 cm, ± densely pink- to purple-tipped stipitate-glandular.

(10–)30+-flowered, open, lax, strongly divaricately branched, conic thyrses, 8–30 cm, purple-tipped stipitate-glandular; (bracts glabrous, proximal marginally ciliate).

5+-flowered, densely crowded in 1–3 glomerulate, often flat-topped thyrses, 3.5–15(–20) cm, sparsely purple-tipped stipitate-glandular.

Flowers

sepals reflexed, elliptic to ovate;

petals white, not spotted, elliptic, clawed, 2–5 mm, longer than sepals;

filaments linear, flattened;

pistils connate to 1/2 their lengths;

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

sepals strongly reflexed, broadly ovate to deltate;

petals white to greenish white, not spotted, usually elliptic to obovate, clawed, 1–1.9 mm, equaling or shorter than sepals;

filaments linear, flattened;

pistils connate to 1/2 their lengths;

ovary 1/2+ inferior.

sepals ascending, ovate to oblong, (margins eciliate, surfaces glabrous);

petals white, not spotted, obovate to ± round, clawed, ca. 2 mm, ca. 1.5 times as long as sepals;

filaments linear, flattened;

pistils distinct almost to base;

ovary nearly 1/3 inferior, (to 1/3 adnate to hypanthium).

sepals ascending to spreading, ovate;

petals white, not spotted, elliptic to linear, clawed, 1.8–3 mm, slightly longer than sepals;

filaments linear, flattened;

pistils connate to 1/2 their lengths;

ovary inferior, appearing more superior in fruit.

Capsules

greenish to reddish purple, folliclelike.

green or reddish purple, folliclelike.

greenish to reddish purple, folliclelike.

purple, folliclelike.

2n

= 76.

= 38.

= 20, 38, 40.

= 20.

Micranthes hitchcockiana

Micranthes nidifica

Micranthes gormanii

Micranthes aprica

Phenology Flowering late spring–summer. Flowering spring–summer. Flowering spring. Flowering summer.
Habitat Wet rocks and ledges on mountain-top balds Open meadows, shrub-lands, gravelly slopes, edges of and open pine forests Wet, rocky ledges and slopes Rocky alpine and snowbed meadows
Elevation 600-1100 m [2000-3600 ft] 100-2600 m [300-8500 ft] 0-1000 m [0-3300 ft] 1700-4500 m [5600-14800 ft]
Distribution
from FNA
OR
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; ID; MT; NV; OR; UT; WA; WY; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
OR; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; NV; OR
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Micranthes hitchcockiana may have originated from hybridization between M. rufidula and M. oregana (P. E. Elvander 1984; W. E. Perkins 1978).

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

Micranthes nidifica is polymorphic and merges to some extent with M. fragosa in limited areas of southern Washington and northern Oregon.

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

Specimens of Micranthes aprica from the Klamath region of California and Oregon are unusually robust, occur at unusually low elevations, and have usually pollen-sterile flowers (P. E. Elvander 1984). In the Steens Mountains of southwestern Oregon, specimens that are morphologically similar to M. rhomboidea from some Utah locations can be found. Although tentatively relegated to M. aprica, these populations need thorough study.

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

Source FNA vol. 8, p. 70. FNA vol. 8, p. 68. FNA vol. 8, p. 62. FNA vol. 8, p. 69.
Parent taxa Saxifragaceae > Micranthes Saxifragaceae > Micranthes 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. 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. 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. 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. 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. 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. tolmiei, M. unalaschcensis, M. virginiensis
M. apetala, 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. tolmiei, M. unalaschcensis, M. virginiensis
Synonyms Saxifraga hitchcockiana Saxifraga nidifica, M. plantaginea, Saxifraga columbiana, Saxifraga integrifolia var. columbiana, Saxifraga integrifolia var. leptopetala, Saxifraga montana, Saxifraga plantaginea Saxifraga gormanii, Saxifraga occidentalis var. dentata Saxifraga aprica
Name authority (Elvander) Brouillet & Gornall: Novon 18: 138. 2008 , (Greene) Small: in N. L. Britton et al., N. Amer. Fl. 22: 134. (1905) (Suksdorf) Brouillet & Gornall: J. Bot. Res. Inst. Texas 1: 1020. 2007 , (Greene) Small: in N. L. Britton et al., N. Amer. Fl. 22: 135. (1905)
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