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Montana Field Guide

Montana Field Guides

Bracken Fern - Pteridium aquilinum


Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 3

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General Description
Perennials with vigorously spreading, scaleless rhizomes. Leaves monomorphic, scattered, 30–150 cm long, petiole ca. same length as the blade. Leaf blade 3 times pinnate, the first division usually ternate. Pinnae 20–50 cm long. Subpinnae alternate on the rachis, narrowly lance-shaped. Pinnules linear, broadened at the base, upper surface glabrous but hairy below. Fertile pinnules with recurved margins partly covering continuous series of sori (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Cosmopolitan (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 32

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Relative Density

Recency

 

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



Habitat
Moist to wet forest, woodlands and meadows, thickets within forested landscapes, often with Thuja plicata or along streams; montane to occasionally subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Bracken Fern — Pteridium aquilinum.  Montana Field Guide.  .  Retrieved on , from