Search Field Guide
Advanced Search
MT Gov Logo
Montana Field Guide

Montana Field Guides

Howell's Quillwort - Isoetes howellii

Status Under Review
Native Species

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.
  • Details on Status Ranking and Review
    Howell's Quillwort (Isoetes howellii) Conservation Status Review
    Review Date =
 
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).

Observations in Montana Natural Heritage Program Database
Number of Observations: 6

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

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