Flora of North America species comparison

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Micranthes tischii

Olympic saxifrage, tisch's saxifrage
Habit Plants solitary or in groups, with bulbils on caudices.
Leaves

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

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

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.

Micranthes tischii
Phenology Flowering summer.
Habitat Wet, cool, shaded, thin-soil ledges and rock crevices
Elevation 1300-2400 m (4300-7900 ft)
Distribution
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. 63.
Parent taxa 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. 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 tischii
Name authority (Skelly) Brouillet & Gornall: J. Bot. Res. Inst. Texas 1: 1021. 2007 ,
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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