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Saddle Mountain saxifrage

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

Habit Plants solitary or in clumps, short-rhizomatous. Plants solitary or in clumps, with bulbils on caudices. Plants solitary or in clumps, with bulbils on caudices.
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, 1–3 cm;

blade broadly ovate to oblong, 1.5–3 cm, ± leathery, base ± abruptly attenuate, margins subentire to slightly crenate, eciliate, surfaces glabrate to 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.

20+-flowered, branched, ± capitate thyrses, 10–15 cm, hairy, sometimes 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 erect, ovate;

petals white, not spotted, ± obovate, clawed, 2–3.5 mm, ± equaling sepals;

filaments linear, flattened;

pistils 3+, connate to 1/2 their lengths;

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

Capsules

greenish to reddish purple, folliclelike.

green or reddish purple, folliclelike.

reddish to purplish, valvate.

2n

= 76.

= 38.

Micranthes hitchcockiana

Micranthes nidifica

Micranthes texana

Phenology Flowering late spring–summer. Flowering spring–summer. Flowering late winter–spring.
Habitat Wet rocks and ledges on mountain-top balds Open meadows, shrub-lands, gravelly slopes, edges of and open pine forests Sandy flats, rocky, open, wooded areas, granite outcrops
Elevation 600-1100 m [2000-3600 ft] 100-2600 m [300-8500 ft] 50-500 m [200-1600 ft]
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.)

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
AR; GA; KS; LA; MO; OK; TX
[BONAP county map]
Parent taxa 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. 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. 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 texana
Name authority (Elvander) Brouillet & Gornall: Novon 18: 138. 2008 , (Greene) Small: in N. L. Britton et al., N. Amer. Fl. 22: 134. (1905) (Buckley) Small: Fl. S.E. U.S., 501. 1903 ,
Source Flora of North America vol. 8, p. 70. Flora of North America vol. 8, p. 68. Flora of North America vol. 8, p. 68.
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