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Montana Field Guide

Montana Field Guides

Howell's Quillwort - Isoetes howellii

Status Under Review

Global Rank: G4G5
State Rank: S2?
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 8

External Links






State Rank Reason (see State Rank above)
4 collections at MONTU from western Montana.
 
General Description
Plants terrestrial or aquatic. Leaves to 25 cm long, often black near the base, long-tapering. Sporangia 3–7 mm long. Megaspores 0.3–0.5 mm wide (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
In MT only known from Flathead, Glacier, Lake and Missoula counties; BC to CA, east to ID and MT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat
Shallow water of ponds, lakes and sloughs; valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Howell's Quillwort — Isoetes howellii.  Montana Field Guide.  .  Retrieved on , from