Cystopteris laurentiana (Weatherby) Blasdell
Laurentian fragile fern
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New England Distribution
Adapted from BONAP data
Non-native: introduced (intentionally or unintentionally); has become naturalized.
County documented: documented to exist in the county by evidence (herbarium specimen, photograph). Also covers those considered historical (not seen in 20 years).
State documented: documented to exist in the state, but not documented to a county within the state. Also covers those considered historical (not seen in 20 years).
Note: when native and non-native populations both exist in a county, only native status is shown on the map.
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Laurentian fragile fern has a scattered distribution in northeastern North America. In New England it is found on cliffs and ledges, usually on high-pH substrate, in Connecticut, Massachusetts and Vermont. Look closely for sparse glandular hairs to confirm identification of this species.
Cliffs, balds, or ledges, ridges or ledges, talus and rocky slopes
- New England state
- Features of leaves
- there are no special features on the leaves
- there are small bulbs on the underside of the leaf blade
- New England state
- Specific habitat
- cliffs, balds, or ledges
- ridges or ledges
- talus or rocky slopes
New England Distribution and Conservation Status
- New Hampshire
- Rhode Island
Exact status definitions can vary from state to state. For details, please check with your state.
- rare to uncommon (S-rank: S2S3), #NAME? (code: #NAME?)
- extremely rare (S-rank: S1)
Native to North America?
Sometimes Confused With
- Cystopteris fragilis (L.) Bernh. var. laurentiana Weatherby
Information from Dichotomous Key of Flora Novae Angliae
3. Cystopteris laurentiana (Weatherby) Blasdell NC
Laurentian fragile fern. Cystopteris fragilis (L.) Bernh. var. laurentiana Weatherby • ct, MA, VT. Cliffs and ledges, usually high-pH substrate.