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California saxifrage, Greene's saxifrage

Olympic saxifrage, tisch's saxifrage

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

basal;

petiole flattened, 2–5 cm;

blade ovate, 2–7 cm, fleshy, base attenuate, margins serrate, rarely subentire, ciliate, surfaces hairy.

basal;

petiole flattened, 0.4–2 cm;

blade ovate to elliptic, 0.5–2.5 cm, fleshy, base attenuate, margins serrate (7–16-toothed), ciliate, surfaces reddish brown-tomentose abaxially, glabrous or rarely glabrate adaxially.

Inflorescences

20+-flowered, (flowers often secund), open, lax thyrses with distant lateral branches, 15–30(–40) cm, purple-tipped stipitate-glandular.

(3–)5–15(–18)-flowered, open, flat-topped thyrses or cymes, 2–7 cm, purple-tipped stipitate-glandular.

Flowers

sepals reflexed, sometimes spreading, triangular to ovate;

petals white, not spotted, elliptic to oblong, clawed, 2.5–4.5 mm, longer than sepals;

filaments linear, flattened;

pistils connate to 1/2 their lengths;

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

sepals spreading to reflexed, ovate;

petals greenish, often purple-margined, not spotted, lanceolate to obovate, not clawed, 1.2–2(–2.5) mm, equaling to longer than sepals;

filaments linear, flattened;

pistils distinct almost to base;

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

Capsules

purplish, folliclelike.

purplish, folliclelike.

Micranthes californica

Micranthes tischii

Phenology Flowering winter–early spring. Flowering summer.
Habitat Shaded fields, rocky or unstable slopes, stream banks Wet, cool, shaded, thin-soil ledges and rock crevices
Elevation 0-1500 m (0-4900 ft) 1300-2400 m (4300-7900 ft)
Distribution
from FNA
CA; OR; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
from FNA
WA; BC
[BONAP county map]
Discussion

Of conservation concern.

Micranthes tischii is known only from the Olympic Peninsula and from inland, mountainous Vancouver Island, British Columbia (Ogilvie & Beguin 798911, V). Closely related to M. rufidula, M. tischii appears to be highly specialized for its habitat. The unusual persistent, green, not clawed (versus deciduous, white, clawed) petals readily distinguish the two species.

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

Source FNA vol. 8, p. 64. FNA vol. 8, p. 63.
Parent taxa Saxifragaceae > Micranthes Saxifragaceae > Micranthes
Sibling taxa
M. apetala, M. aprica, M. bryophora, 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
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. tolmiei, M. unalaschcensis, M. virginiensis
Synonyms Saxifraga californica, M. parvifolia, Saxifraga fallax, Saxifraga hallii, Saxifraga parvifolia, Saxifraga virginiensis var. californica Saxifraga tischii
Name authority (Greene) Small: in N. L. Britton et al., N. Amer. Fl. 22: 140. (1905) (Skelly) Brouillet & Gornall: J. Bot. Res. Inst. Texas 1: 1021. 2007 ,
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