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Montana Field Guide

Montana Field Guides

Big-pod Mariposa Lily - Calochortus eurycarpus


Global Rank: G4
State Rank: S3S4
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value:

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State Rank Reason (see State Rank above)
Numerous recent reports from 7 counties. Tends to grow at high elevations, where its habitat is probably secure.
 
General Description
Stem 15–60 cm. Leaf blade linear to linear-lanceolate, 2–10 mm wide. Bracts 1–4 cm long. Flowers 1 to 3; sepals yellowish, 15–30 mm long; petals white or purplish, 3–4 cm long; inner surface sparsely hairy with a purple, flattened-hemispheric mark 4–6 mm above the fringed bullet-shaped gland; anthers oblong. Capsule ellipsoid, erect, 2–3 cm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
Easily distinguished from C. bruneaunis and C. nuttallii by the arched, but not circular gland on the petals. Also, it has broader ovaries and fruits (orbicular to oblong) than either of these two species or its other local look-alike, C. gunnisonii (ovaries and fruits linear).

Range Comments
WA to MT south to NV and WY (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat
Most often in subalpine meadows. In Montana, this species decends to the valleys. In either case, it prefers open areas and in Montana, it grows in well-drained soil.

References
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Citation for data on this website:
Big-pod Mariposa Lily — Calochortus eurycarpus.  Montana Field Guide.  .  Retrieved on , from