OregonFlora species comparison

37(29–50) μm.

54(47–57) μm.

well developed; greater than 3 cm, with a reddish brown stripe below the trophophore.

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

short-stalked (stalk usually shorter than distance between first and second pairs of pinnae);

blade pinnate-pinnatifid, subdeltate; to 5 cm long; dull gray-green and usually appearing glaucous;

pinnae ascending, usually overlapping; ovate to lanceolate, broadly attached to the rachis; broadest at or below the middle, asymmetrically lobed with basiscopic lobes enlarged;

pinnae lobes with rounded apices; the margins slightly rolled; lowest pinnae often exaggerated; up to twice as long as the adjacent pinnae;

sporangia rarely present on pinnae margins.

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.

erect with stalk up to 2 times as long as the trophophore at spore release; in larger plants becoming ternately branched with lateral branches nearly as long as main axis.

stiffly erect;

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

branches much reduced, often appearing absent.

=180 (allotetraploid, derived from B. lanceolatum and an unknown diploid).

=90.