Athyrium filix-femina var. cyclosorum

Ruprecht

Dist. Crypt. Vasc. Ross. 41. 1845.

Common names: Northwestern lady fern
Endemic
Synonyms: Athyrium alpestre var. cyclosorum (Ruprecht) T. Moore Athyrium filix-femina subsp. cyclosorum (Ruprecht) C. Christensen Athyrium filix-femina var. sitchense Ruprecht
Treatment appears in FNA Volume 2.

Petiole 15–45 (–60) cm, base densely scaly; scales brown or dark-brown, lanceolate or ovatelanceolate, (7–) 10–20 × (1–) 2–5 mm, ± crisped. Blade elliptic to oblanceolate, 1–2-pinnate-pinnatifid, 25–120 × 10–50 cm, gradually narrowed proximally, broadest at or just above middle, apex acuminate. Pinnae very short-stalked or sessile, linear-oblong or oblong, apex acuminate. Pinnules sessile, narrowly deltate or oblong-lanceolate, base basiscopically broadly cuneate, acroscopically truncate, ± auriculate, apex obtuse to ± acute. Rachis, costae, and costules glabrous or with scales or pale glands. Sori round to elliptic, hooked at distal end, or horseshoe-shaped, medial to supramedial; indusia long-ciliate with nonglandular marginal hairs as long as or longer than width of indusia. Spores yellow. 2n = 80.


Habitat: Moist woods, swamps, streambanks
Elevation: 10–1600 m

Distribution

V2 87-distribution-map.gif

Alta., B.C., Man., N.W.T., Ont., Que., Sask., Yukon, Alaska, Calif., Idaho, Mont., Oreg., S.Dak., Wash., Wyo.

Discussion

Athyrium filix-femina var. cyclosorum is most similar to the European var. filix-femina; it differs in having broader, nearly equilateral pinnules and medial to supramedial sori. The variety is distributed in northwestern North America with disjunct populations in northwestern Quebec and Ontario.

Selected References

None.

Lower Taxa

None.
Masahiro Kato +
Ruprecht +
black;dark redbrown +
persisting +
auriculate +  and cuneate +
Polypodium filix-femina +
simple to commonly +
25 cm250 mm <br />0.25 m <br /> (?) +  and 120 cm1,200 mm <br />1.2 m <br /> (?) +
narrowed;1-2-pinnate-pinnatifid;elliptic;oblanceolate +
reduced +
broadest;10cm;50cm +
roundish +
Northwestern lady fern +
Alta. +, B.C. +, Man. +, N.W.T. +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Calif. +, Idaho +, Mont. +, Oreg. +, S.Dak. +, Wash. +  and Wyo. +
10–1600 m +
often +  and glabrous +
Moist woods, swamps, streambanks +
ciliate +  and dentate +
monomorphic +
45 cm450 mm <br />0.45 m <br /> (60 cm600 mm <br />0.6 m <br />) +
straw-colored +
0.5 times length of blade;0.5 times length of blade +
15 cm150 mm <br />0.15 m <br /> (45 cm450 mm <br />0.45 m <br />) +
sessile +  and short-stalked +
oblong-lanceolate +  and deltate +
sessile +  and short-petiolulate +
Dist. Crypt. Vasc. Ross. +
with scales or pale glands +  and glabrous +
round +, cuplike +, hoodlike +, reniform +, falcate +  and linear +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
dark-brown;brown +
persistent +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
crisped;ovatelanceolate;lanceolate +
2mm +  and 5mm +
crenate +  and serrulate +
straight +
persistent +
with narrow sinus +  and attached +
discrete +
horseshoe--shaped +, hooked +, round +  and elliptic +
reniform +  and oblong +
dictyostelic +, unbranched +  and branched +
ascending +  and short-creeping +
Athyrium alpestre var. cyclosorum +, Athyrium filix-femina subsp. cyclosorum +  and Athyrium filix-femina var. sitchense +
Athyrium filix-femina var. cyclosorum +
Athyrium filix-femina +
variety +
epiphytic +  and hemiepiphytic +