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Erythronium montanum

avalanche-lily, white avalanche-lily, white glacier lily

Tuolumne fawn-lily

Bulbs

narrowly ovoid, 25–60 mm.

ovoid, 50–100 mm, readily forming sessile offsets.

Leaves

10–20 cm;

blade green, ovate to broadly lanceolate, base ± abruptly narrowed to petiole, margins wavy.

15–35 cm;

blade green, elliptic to ovate, margins entire to ± wavy.

Scape

12–35 cm.

± reddish, 15–35 cm.

Inflorescences

1–3-flowered.

usually 1–4-flowered.

Flowers

tepals white to creamy white with bright yellow zone at base, broadly ovate to broadly lanceolate, 25–45 mm, inner wider than outer, auriculate at base, length less than 4 times width;

stamens 12–24 mm;

filaments white, linear, slender, less than 0.8 mm wide;

anthers bright yellow;

style white, 13–25 mm;

stigma with slender, usually recurved lobes 1–5 mm.

tepals yellow, narrowly ovate, 20–35 mm, inner with small auricles at base;

stamens 12–16 mm;

filaments white to creamy white, slightly widened, 0.4–0.6 mm wide at base;

anthers yellow;

style ± white, 8–10 mm;

stigma ± unlobed or with lobes shorter than 1 mm.

Capsules

oblong, 3–6 cm.

obovoid, 2–4 cm.

2n

= 24.

Erythronium montanum

Erythronium tuolumnense

Phenology Flowering summer, usually soon after snowmelt (Jun–Aug). Flowering early spring (Mar).
Habitat Montane and subalpine meadows, open coniferous forests Open woods, shady canyons
Elevation (300–)800–2000 m ((1000–)2600–6600 ft) 600–1000 m (2000–3300 ft)
Distribution
from FNA
OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

This species occurs in the Coast Ranges of southern British Columbia, and disjunctly to southern Vancouver Island, the Olympic Peninsula, and Cascade Mountains from Mount Rainier National Park in Washington to central Oregon.

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

Of conservation concern.

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

Source FNA vol. 26, p. 157. FNA vol. 26, p. 159.
Parent taxa Liliaceae > Erythronium Liliaceae > Erythronium
Sibling taxa
E. albidum, E. americanum, E. californicum, E. citrinum, E. elegans, E. grandiflorum, E. helenae, E. hendersonii, E. klamathense, E. mesochoreum, E. multiscapideum, E. oregonum, E. pluriflorum, E. propullans, E. purpurascens, E. pusaterii, E. quinaultense, E. revolutum, E. rostratum, E. taylorii, E. tuolumnense, E. umbilicatum
E. albidum, E. americanum, E. californicum, E. citrinum, E. elegans, E. grandiflorum, E. helenae, E. hendersonii, E. klamathense, E. mesochoreum, E. montanum, E. multiscapideum, E. oregonum, E. pluriflorum, E. propullans, E. purpurascens, E. pusaterii, E. quinaultense, E. revolutum, E. rostratum, E. taylorii, E. umbilicatum
Name authority S. Watson: Proc. Amer. Acad. Arts 26: 130. (1891) Applegate: Contr. Dudley Herb. 1: 153. (1930)
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