Asplenium scolopendrium L. var. americanum (Fern.) - American Hart's Tonguefern


 

|  back  | forward |

Asplenium scolopendrium - (image 1 of 9)

 

Taxonomy

Family: Aspleniaceae

 

Listed as Phyllitis scolopendrium (L.) Newman in Gleason & Cronquist (1991).

Habitat

Shaded, damp, rocky, calcareous slopes

Associates

 

Distribution

Found only in New Brunswick, two counties in Ontario, two counties in NY, and two counties in TN.

Morphology

Evergreen. Leaves bright green, leathery, glossy, to 30 cm long and 5 cm wide, edge wavy, cordate base. Fruitdots elongate, in pairs on either side of a vein; indusia opening toward each other.

Notes

This species also occurs in Europe where it is surprisingly common. The variety americana of North America is tetraploid, whereas the European plants (var. scolopendrium) are all diploid.

References

Cobb, B. 1984. A Field Guide to Ferns and Their Related Families.

Houghton Mifflin Co., New York, NY

 

Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.

The New York Botanical Garden. Bronx, NY

 


Home

 

Michael Hough 2004