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Montana Field Guide

Montana Field Guides

Pacific mosquitofern - Azolla filiculoides


Global Rank: G5
State Rank: SNR
* (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)
Previously and incorrectly reported as A. mexicana in Montana.
 
General Description
Tiny, floating, mat-forming, aquatic annual. Stems tightly branched with simple roots. Leaves emersed, alternate, overlapping, sessile with 2 ovate lobes <1 mm long; upper lobe green or red, covered with white, flake-like hairs; lower lobe smaller and floating. Sporocarps dimorphic, obovoid, apparently in lower leaf axils; megasporocarps with 1 spore < 0.5 mm long; microsporocarps ca. 0.1 mm long with numerous spores clustered in small masses bearing hooked hairs (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
BC to CA, AZ, NM, TX, Mexico. Collected in Ravalli Co. (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat

References
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Citation for data on this website:
Pacific mosquitofern — Azolla filiculoides.  Montana Field Guide.  .  Retrieved on , from