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Montana Field Guide

Montana Field Guides

Western Quillwort - Isoetes occidentalis
Other Names:  Isoetes lacustris var. paupercula

Status Under Review

Global Rank: G4G5
State Rank: S1?
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 9

External Links






State Rank Reason (see State Rank above)
Known from 1 collection at Placid Lake, Missoula county in 1976.
 
General Description
Plants aquatic. Leaves to 20 cm, gradually tapering. Sporangia 3–6 mm long. Megaspores 0.4–0.8 mm wide (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Alaska, British Columbia, and California, east to Montana, Wyoming and Colorado.


Habitat
Our one record from shallow water of a montane lake in Missoula County (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Western Quillwort — Isoetes occidentalis.  Montana Field Guide.  .  Retrieved on , from