Cryptogramma cascadensis
Species of fern
title: "Cryptogramma cascadensis" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["pteridaceae", "ferns-of-california", "plants-described-in-1989"] description: "Species of fern" topic_path: "general/pteridaceae" source: "https://en.wikipedia.org/wiki/Cryptogramma_cascadensis" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Species of fern ::
| image = Cryptogramma cascadensis habit (Yarnell).jpg | image_caption = Cryptogramma cascadensis on a rock wall near Frozen Lake on Mount Rainier, Washington, USA | status = | status_system = TNC | genus = Cryptogramma | species = cascadensis | authority = 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. The hydathodes are shallow and linear, unlike the pit-like hydathodes of Cryptogramma acrostichoides.
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 northwest of Snoqualmie Pass.
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.
Gallery
Image:Cryptogramma cascadensis JHT-iNat-240949930.jpg|Hydathodes
References
References
- (2018). "Flora of the Pacific Northwest". University of Washington Press.
- Alverson, Edward R.. (1989). "''Cryptogramma cascadensis'', a new parsley-fern from western North America". American Fern Journal.
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