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Saddle Mountain saxifrage

Olympic saxifrage, tisch's saxifrage

Habit Plants solitary or in clumps, short-rhizomatous. Plants solitary or in clusters, rhizomatous. Plants solitary or in groups, 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 ± distinct, flattened, (0.5–)1–3.5 cm;

blade rhombic or fan-shaped, sometimes nearly round, (1–)1.5–3.5 cm, ± fleshy, base attenuate to ± cuneate, margins 7–11-toothed in distal 1/2–2/3 (teeth 1–3 mm), sparsely ciliate, surfaces glabrous.

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

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

3–15-flowered, usually racemiform, sometimes paniculiform thyrses, 3–15 cm, axis glabrous or sparsely long-hairy, branches ± densely (rarely sparsely) long tangled-hairy; (bracts reduced).

(3–)5–15(–18)-flowered, open, flat-topped thyrses or cymes, 2–7 cm, 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 reflexed, lanceolate to ovate;

petals white to cream, sometimes purplish, not spotted, linear to narrowly elliptic, not clawed, 2–4 mm, longer than sepals;

filaments linear, flattened;

pistils connate 1/2+ their lengths, (conic);

ovary ± 1/2 inferior.

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

greenish to reddish purple, folliclelike.

purple-black, valvate.

purplish, folliclelike.

2n

= 76.

= 24.

Micranthes hitchcockiana

Micranthes calycina

Micranthes tischii

Phenology Flowering late spring–summer. Flowering summer. Flowering summer.
Habitat Wet rocks and ledges on mountain-top balds Flushes, stream banks, tundra, around late snowbeds, screes Wet, cool, shaded, thin-soil ledges and rock crevices
Elevation 600-1100 m [2000-3600 ft] (0-)30-1700 m [(0-)100-5600 ft] 1300-2400 m [4300-7900 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 calycina is found mostly in western Alaska, in the north from the Seward Peninsula to the Brooks Range west of Atigun Pass, and in the south from Unimak Island and the Ahklum Mountains to the Saint Elias Mountains. It is also present on the main Bering Sea islands, but apparently not on the Aleutians west of Unimak. Plants of this species sometimes have been misidentified as M. davurica (Willdenow) Small, a species restricted to eastern Siberia.

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

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.)

Distribution
from FNA
OR
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; e Asia (Russian Far East)
[BONAP county map]
from FNA
WA; BC
[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. 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 hitchcockiana Saxifraga calycina, Saxifraga davurica subsp. grandipetala, Saxifraga davurica var. grandipetala Saxifraga tischii
Name authority (Elvander) Brouillet & Gornall: Novon 18: 138. 2008 , (Sternberg) Gornall & H. Ohba: J. Bot. Res. Inst. Texas 1: 1020. (2007) (Skelly) Brouillet & Gornall: J. Bot. Res. Inst. Texas 1: 1021. 2007 ,
Source Flora of North America vol. 8, p. 70. Flora of North America vol. 8, p. 59. Flora of North America vol. 8, p. 63.
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