OregonFlora species comparison

slender, white pruina often present;

scales dense, brown, lanceolate, toothed or entire;

taste acrid/bitter.

slender, usually white-pruinose;

scales dense, lanceolate, toothed; reddish brown, usually with paler margins;

taste acrid/bitter.

to 30 × 5 cm;

petiole slender; to 12 × 0.1 cm.

to approximately 30 cm long;

petiole well developed; up to 10 cm; slender, approximately 1 mm thick.

oblong to narrowly ovate; pinnatifid, slightly leathery; up to 18 × 5 cm, glabrous above;

scales on abaxial rachis sparse, brown; less than 6 cells wide.

pinnatifid, slightly leathery, glabrous above, 6–12 cm, occasionally longer, 2–4 cm wide, narrowly oblong or slightly wider in the mid-region;

hairs absent;

scales narrowly ovate; more than 6 cells wide, often sparse, mostly confined to the abaxial rachis.

small, oblong; to 2.5 × 1 cm;

margin entire to serrulate;

apex rounded to acute;

veins free.

short, oblong; up to 10 × 2.5 cm;

apex rounded or obtuse;

margins subentire to entire;

veins free.

rounded; less than 3 mm, often oval when immature;

sporangiasters absent; but aborted purplish sporangia often present.

to 2.3 mm;

sporangiasters present, interspersed with the fertile sporangia.

=148.

=74.