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Montana Field Guide

Montana Field Guides

Spinulose Shieldfern - Dryopteris carthusiana
Other Names:  Dryopteris austriaca, Dryopteris spinulosa

Status Under Review

Global Rank: G5
State Rank: S3?
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 7

External Links






State Rank Reason (see State Rank above)
Approximately 30 collections at MONTU from several counties.
 
General Description
Leaves monomorphic, 15–75 cm long, petiole shorter than blade with tan scales toward the base. Leaf blade light green, ovate, non-glandular, twice pinnate at the base. Pinnules deeply pinnately lobed or toothed; downward pointing longer than those pointing upward on lower pinnae. Indusium lacking glands (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Western third of MT east to Park and Stillwater counties, excluding the southwest; circumboreal south to WA, MT, NE, MO, and SC (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 28

(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
Shady, mesic forests, often with western red cedar or hemlock; montane, subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Spinulose Shieldfern — Dryopteris carthusiana.  Montana Field Guide.  .  Retrieved on , from