Asplenium viride
John C. Game

Flora of Oregon

Stems short, ascending, usually unbranched, densely clad with scales and persistent long leaf bases; scales with very prominent cell walls, darker central stripe absent.

Leaves often wintergreen but not fully evergreen, up to approximately 15 cm long.

Petioles short, up to 33–50% the leaf length, glossy yellowish brown at the base, green above, adaxial side often grooved, not winged; rachis green; petiole and rachis with sparse narrow lattice-like scales and glandular hairs.

Blades linear, 1-pinnate, to approximately 10 × 1.5 cm.

Pinnae ovate or deltate, to 7 × 5 mm, sparsely glandular-hairy; margins with few broad rounded or obtuse teeth; apex rounded; base unequal.

Sori linear to oblong, to 2 mm long, on lateral veins diverging from the costa at an acute angle, usually 2–6 sori per segment; indusia pale, borne on 1 side of the sorus and partially covering it.

2n=36.

Moist crevices in shaded limestone outcrops. 2000–2400 m. BW. CA, ID, NV, WA; western and northeastern North America; Eurasia. Native.

Photo images

/imglib/OF_FP/202010/DIG51559_1602356805_tn.jpg
/imglib/OF_FP/202010/DIG51389_1602356849_tn.jpg
/imglib/OF_FP/202010/DIG51388_1602356770_tn.jpg
/imglib/_OFPFP/201704/09SL021APR1009_1492399619_tn.jpg
/imglib/OF_FP/202106/DIG50626_1623464292_tn.jpg

Herbarium specimens

https://www.pnwherbaria.org/images/thumbnail.php?Image=SRP058535.jpg
https://oregonflora.org/imglib/OSU_V/OSC-V-002/OSC-V-002730_tn.jpg
https://oregonflora.org/imglib/OSU_V/OSC-V-002/OSC-V-002733_tn.jpg
https://oregonflora.org/imglib/OSU_V/OSC-V-002/OSC-V-002729_tn.jpg
https://oregonflora.org/imglib/OSU_V/OSC-V-002/OSC-V-002732_tn.jpg