OregonFlora species comparison

(40)44–47(54) μm.

54(47–57) μm.

well developed; greater than 2 cm, green.

well developed; greater than 2 cm except in very small plants, green.

sessile or short-stalked; the stalk occasionally to 2 cm long;

blade 1-pinnate, narrowly oblong-triangular; to 6 × 2 cm, yellow-green and shiny in life;

pinnae to 6 pairs, strongly ascending, narrowly fan-shaped, spanning an arc of less than 90°; broadest at the outer margin, usually coarsely toothed and with 2–5 lobes; lower pinnae often bearing marginal sporangia.

with stalk 0.3–2 cm long, usually comprising 25–50% or more the total trophophore length;

blade 1-pinnate, oblong to linear; to 4 × 1 cm; dull green, glaucous, often appearing fleshy;

pinnae to 3(5) pairs, often irregularly spaced with adjacent pinnae often confluent, sometimes completely fused to form a spoon-shaped blade, spreading to ascending; wedge-shaped with nearly parallel sides and a truncate or slightly rounded, often lacerate outer margin.

stiffly erect;

stalk 0.5–1 times as long as the trophophore at spore release, rarely longer;

branches mostly simple, strongly ascending.

stiffly erect;

stalk (0.5)1–3 times as long as the trophophore at spore release;

branches much reduced, often appearing absent.

=180 (allotetraploid, apparently derived from B. crenulatum and B. lineare).

=90.