Biology:Cryptogramma cascadensis
| Cryptogramma cascadensis | |
|---|---|
.jpg)
| |
| Cryptogramma cascadensis on a rock wall near Frozen Lake on Mount Rainier, Washington, USA | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Polypodiales |
| Family: | Pteridaceae |
| Genus: | Cryptogramma |
| Species: | C. cascadensis
|
| Binomial name | |
| Cryptogramma cascadensis E.R.Alverson
| |
Cryptogramma cascadensis is a species of fern known by the common names Cascade parsley fern and Cascade rockbrake.
Description
The plant forms a clump from a rhizome. It has two types of leaves. The sterile leaf is flat with lobed oval or diamond-shaped leaflets, and the fertile leaf is longer, with narrow, thick, fingerlike leaflets with edges curled under to cover the sporangia on the undersides. The leaves are deciduous.[1]
Taxonomy
Formerly lumped with Cryptogramma acrostichoides, C. cascadensis was described as a distinct species by Ed Alverson in 1989. The type specimen was collected growing on talus below Chair Peak, 5 km (3 mi) northwest of Snoqualmie Pass.[2]
Distribution and habitat
It is native to western North America from British Columbia to Montana to California , where it grows in the cracks and crevices of mountain talus slopes, especially in moist subalpine areas on volcanic or granite rocks.
References
- ↑ Hitchcock, C.L. and Cronquist, A. 2018. Flora of the Pacific Northwest, 2nd Edition, p. 56. University of Washington Press, Seattle.
- ↑ Alverson, Edward R. (1989). "Cryptogramma cascadensis, a new parsley-fern from western North America". American Fern Journal 79 (3): 95–102. doi:10.2307/1547291. https://www.biodiversitylibrary.org/page/32152592.
External links
Wikidata ☰ Q5190927 entry
 |  |
