Flora of North America species comparison

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Cryptogramma cascadensis

Cascade parsely fern, Cascade parsley fern, Cascade rockbrake
Stems

decumbent to erect, much branched from base, stout, 4–8 mm diam. (including hardened, persistent leaf bases);

scales often bicolored, dense, broadly lanceolate to linear, to 6 × 2 mm.
Leaves

strongly tufted, deciduous;

sterile leaves spreading, 3–20 cm;

fertile leaves erect, 5–25 cm;

petioles, costae, and costules glabrous.
Petiole

green to straw-colored, dark brown only on proximal 1/8 or less, ca. 1 mm wide when dry, collapsing and strongly furrowed;

scales bicolored or ± concolored, becoming sparse distally.
Blade

deltate to ovate-lanceolate, all 2–3-pinnate, herbaceous, thin and translucent when dried, hydathodes superficial.
Segments

of sterile leaves oblong to fan-shaped, bases cuneate, distal 1/2–1/3 of each segment regularly dentate and often more deeply incised every 2d and 4th tooth;

segments of fertile leaves ascending to erect, strongly differentiated from those of sterile leaves, linear, 3–12 × 1–2 mm;

fertile segments revolute, covering sporangia.
Sporangia

in sori that coalesce at maturity.
2n

= 60.

Cryptogramma cascadensis
Habitat New growth produced in spring, spores maturing in late summer and autumn, leaves dying in autumn. Talus slopes and cliff crevices, often on igneous rocks, typically in relatively mesic subalpine habitats
Elevation 900–3500 m (3000–11500 ft)
Distribution
from FNA
CA; ID; MT; OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

Populations of Cryptogramma cascadensis were previously identified as C. acrostichoides.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 2.
Parent taxa Pteridaceae > Cryptogramma
Sibling taxa
C. acrostichoides, C. sitchensis, C. stelleri
Name authority E. R. Alverson: Amer. Fern J. 79: 95. (1989)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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