Classification
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All Names

  • Scientific Names
    • Cystopteris protrusa
    • Cystopteris fragilis protrusa
  • English
    • lowland brittle fern

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Recent observations

Photos / Sounds

Observer

elfaulkner

Date

June 29, 2010

Photos / Sounds

What

Cystopteris fragilis protrusa Cystopteris protrusa

Observer

elfaulkner

Date

April 22, 2012

Photos / Sounds

Observer

rcurtis

Date

April 20, 2013
View all observations

Description from Wikipedia

Cystopteris protrusa is a common fern of eastern North America. Throughout much of its range, it is the most common Cystopteris. It is commonly known as the lowland brittle fern or lowland fragile fern. The specific name, protrusa, refers to the fact that the rhizome protrudes a short distance beyond the current year's fronds to form the following year's leaf buds. This protrusion is a positive diagnostic in the field. Sori are round and covered in...

No range data available.