Cryptogramma cascadensis

E. R. Alverson

Amer. Fern J. 79: 95. 1989.

Common names: Cascade parsley fern
Endemic
Treatment appears in FNA Volume 2.

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 ovatelanceolate, 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.


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

Distribution

V2 471-distribution-map.gif

B.C., Calif., Idaho, Mont., Oreg., Wash.

Discussion

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

Selected References

None.

Lower Taxa

None.

"broad" is not a number.

... more about "Cryptogramma cascadensis"
Edward R. Alverson +
E. R. Alverson +
incised +  and cuneate +
pubescent +  and glabrous +
lustrous +  and dull to somewhat +
deltate +  and ovatelanceolate +
Cascade parsley fern +
B.C. +, Calif. +, Idaho +, Mont. +, Oreg. +  and Wash. +
900–3500 m +
yellow +  and white +
obcordate;reniform +
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 +
monomorphic +
tufted;scattered +
deciduous +
recurved +  and reflexed +
sterile +  and fertile +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
noncircinate +  and circinate +
5 cm50 mm <br />0.05 m <br /> (25 cm250 mm <br />0.25 m <br />) +
dentate or +  and shallowly deeply cut +
furrowed +  and collapsing +
dark-brown;green;straw-colored +
Amer. Fern J. +
concolored;bicolored;bicolored +
persistent +
0 cm0 mm <br />0 m <br /> (?) +  and 0.6 cm6 mm <br />0.006 m <br /> (?) +
broadly lanceolate +  and linear +
0mm +  and 2mm +
differentiated +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
tetrahedral +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
decumbent +  and erect +
few +  and many +
Cryptogramma cascadensis +
Cryptogramma +
species +
adnate +  and free +
crescent--shaped +  and roundish +