|Purple cliff brake|
Photo by Reuben Goforth
Small fern (50 cm) of sunny calcareous rocks in the Upper Peninsula; leaves triangular and 2-3 times divided, arising from dark purple hairy stalks; sporangia borne on inrolled margins of pinnules.
Status and Rank
- State Status: T - Threatened (legally protected)
- State Rank: S2 - Imperiled
- Global Rank: G5 - Secure
|County Name||Number of Occurrences||Year Last Observed|
Updated 05/08/2013. Information is summarized from MNFI's database of rare species and community occurrences. Data may not reflect true distribution since much of the state has not been thoroughly surveyed.
The purple cliff-brake is found on alkaline bedrock outcrops, cliff faces, ledges, and pavement areas in the Upper Peninsula.
Natural Community Types
Creeping juniper, bearberry, poison ivy, fragile fern, wild columbine, common juniper, creeping juniper, Gillman's goldenrod, sand violet, chokecherry, and fly honeysuckle.
The species requires protection of the dry, rocky habitat from human foot traffic or clifftop development.
General Survey Guidelines
Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgement of the investigator.
- Meander search
Survey Period: From first week of June to fourth week of August
More InformationSee MNFI Species Abstract
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- Gray, A. 1950. Gray's Manual of Botany; eighth ed. Van Nostrand Reinghold, New York. 1632pp.
- Holmgren, N.H. 1998. Illustrated Companion to Gleason and Cronquist's Manual. Illustrations of the vascular plants of Northeastern United States and adjacent Canada. New York Botanical Garden, Bronx. 937pp.
- Lellinger, D.B. 1985. A field manual of ferns and fern allies of the United States and Canada.. Smithsonian Institute Press, Washington D.C. 389pp.
- Mickel, J.T. 1979. How to know the ferns and fern allies. The Pictured Key Nature Series. William C. Brown Company, Dubuque. 229pp.