OregonFlora species comparison

slender, usually white-pruinose;

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

taste acrid/bitter.

stout, white-pruinose, densely clothed in scales;

scales brown, longtoothed;

margins often pale;

taste bland.

to approximately 30 cm long;

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

to 60 cm;

petiole to 25 × 0.2 cm.

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.

pinnatifid, narrowly ovate; stiff and leathery, dark green; to 35 × 8 cm, with relatively few pairs of robust pinnae;

adaxial surface glabrous;

scales on abaxial surface scattered; broad; convex, brown, with pale margins.

short, oblong; up to 10 × 2.5 cm;

apex rounded or obtuse;

margins subentire to entire;

veins free.

oblong; up to 9 × 2 cm;

margin usually subentire;

apex rounded to acute; some veins anastomosing, forming indistinct areolae along the pinnae.

to 2.3 mm;

sporangiasters present, interspersed with the fertile sporangia.

round; large; over 3 mm, often absent on proximal pinnae;

sporangiasters absent.

=74.

=74.