Woodsia obtusa (Spreng.) Torr. - Blunt-lobed Cliff Fern


 

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Woodsia obtusa - (image 1 of 3)

 

Taxonomy

Family: Woodsiaceae

Habitat

Partially shaded ledges, rocky woods and loose talus-slopes, mostly in circumneutral to calcareous soils.

Associates

 

 Distribution

ME to MN and eastern NE, south to FL and TX.

Morphology

Deciduous from a short rhizome; rhizome scales few, lance-linear, 2-3.5 mm long, with a dark central stripe when mature; petioles not jointed, the persistent bases of unequal length; blade glandular, without long septate hairs, lanceolate, 3.5-10 cm wide, slightly narrowed proximally, binnate-pinnatifid, rachis glandular-hairy and sparingly scaly; pinnae in 13-18 pairs, subsessile, ovate to ovate-lanceolate; pinnules in 6-13 pairs, oblong, rounded, deeply pinnatifid with 4-6 pairs of rounded, crenate segments; indusial lobes broad, 4-6, glandular margined, incurved and covering the sporangia when young.

Notes

Spores produced midsummer to fall

Wetland indicator: UPL

Intermediate in appearance between Cystopteris and Dryopteris.

References

Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.

The New York Botanical Garden. Bronx, NY

 


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 Michael Hough 2018