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bog saxifrage, Oregon or bogsaxifrage, Oregon saxifrage

Texas saxifrage

Habit Plants solitary or in clusters, with caudex or thick, fleshy rhizomes. Plants solitary or in clumps, with bulbils on caudices.
Leaves

basal;

petiole indistinct, flattened, 3–10 cm;

blade linear to oblanceolate, 6–25 cm, fleshy, base cuneate, margins serrulate to denticulate, ciliate, surfaces glabrous or 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

(30–)50+-flowered, open to ± crowded, conic to cylindric thyrses, 25–125 cm, hairy proximally, yellow- to pink-tipped stipitate-glandular distally.

20+-flowered, branched, ± capitate thyrses, 10–15 cm, hairy, sometimes purple-tipped stipitate-glandular.

Flowers

sepals reflexed, ovate to triangular;

petals white, not spotted, broadly elliptic to obovate and 2 times as long as sepals, sometimes oblanceolate and equaling or shorter than sepals, clawed, 2–5 mm;

filaments linear, flattened;

pistils connate to 1/2 their lengths;

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

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

green to reddish purple, folliclelike.

reddish to purplish, valvate.

2n

= 38, 76.

Micranthes oregana

Micranthes texana

Phenology Flowering early spring–summer. Flowering late winter–spring.
Habitat Bogs, marshes Sandy flats, rocky, open, wooded areas, granite outcrops
Elevation 100-2500 m (300-8200 ft) 50-500 m (200-1600 ft)
Distribution
from FNA
CA; CO; ID; MT; NV; OR; WA; AB
[WildflowerSearch map]
[BONAP county map]
from FNA
AR; GA; KS; LA; MO; OK; TX
[BONAP county map]
Discussion

In both habitat and morphology, Micranthes oregana is similar to M. pensylvanica. A thorough investigation of the two species, especially the populations in Colorado that are disjunct from those in Montana, is needed to clarify relationships. The name Saxifraga integrifolia was misapplied to M. oregana by early California authors.

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

Source FNA vol. 8, p. 67. FNA vol. 8, p. 68.
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. 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 oregana, Saxifraga montanensis, Saxifraga oregana var. montanensis Saxifraga texana
Name authority (Howell) Small: in N. L. Britton et al., N. Amer. Fl. 22: 138. 1905 , (Buckley) Small: Fl. S.E. U.S., 501. 1903 ,
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