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Montana Field Guides

Baker Mariposa Lily - Calochortus apiculatus

Native Species

Global Rank: G4G5
State Rank: S3S4

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

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General Description
Stem 10–35 cm. Leaf blade 5–18 mm wide. Bracts 2 or more, 1–5 cm long. Flowers 1 to 3; sepals 15–25 mm long; petals white, drying yellowish with serrulate margins; inner surface often yellow basally, hairy with a small, dark circular gland near the base; anthers lanceolate, apiculate. Capsule nodding, ovoid 1–3 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
Baker Mariposa Lily - Calochortus apiculatus
*Basal Leaf: Flat, broader and usually more than half as long as the stem leaves.
*Anthers: Lanceolate (wider from base to below middle and tapering to the tip) and apiculate (short, sharp tip).
*Sepals: 15-25 mm long.
*Petals: Outside is white, drying yellowish, and serrulate on the margins. Inside the petals are hairy (or strongly bearded), white, and at the base it is yellow with a small (1.5 mm), circular, dark, central gland.

Elegant Mariposa Lily - Calochortus elegans
*Basal Leaf: Flat, broader and usually more than half as long as the stem leaves.
*Sepals: purplish, 10-15 mm long.
*Anthers: Lanceolate (wider from base to below middle and tapering to the tip) and apiculate (short, sharp tip).
*Petals: Strongly clawed. Outside is white. Inside is purple, surface is hairy (ciliate or densely long bearded), and at the base is darker purple crescent-shaped gland.

Big-pod Mariposa Lily - Calochortus eurycarpus
*Basal Leaf: Flat, broader and usually more than half as long as the stem leaves.
*Anthers: Oblong and blunt at the tip.
*Sepals: yellowish, 15-30 mm long.
*Petals: Outside is white or purplish, 3-4 cm long. Inside is purplish with sparse hairs and at the base a fringed yellow gland; centrally there is a large circular purplish spot.

The following Mariposa Lilies differ from those above in that their basal leaves are channeled (v-shaped), similar in width to the stem leaves, and often less than half the length of the stem leaves:

Gunnison's Mariposa Lily - Calochortus gunnisonii
Bruneau Mariposa Lily - Calochortus bruneaunis, SOC
Nuttall's Mariposa Lily - Calochortus nuttallii
Green-band Mariposa Lily - Calochortus macrocarpus

Species Range
Present
 


Range Comments
Endemic to northeast WA and adjacent BC, AB, ID and MT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 415

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Grasslands, drier meadows, forest openings; valleys to lower subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Anderson, N.L. 1962. Grasshopper-vegetation relationships on Montana grasslands. Ph.D Dissertation. Bozeman, Montana: Montana State University. 73 p.
    • Johnson, T. W. 1982. An analysis of pack and saddle stock grazing areas in the Bob Marshall Wilderness. M.Sc.Thesis. Bozeman, MT: Montana State University. 105 p.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
Baker Mariposa Lily — Calochortus apiculatus.  Montana Field Guide.  .  Retrieved on , from