Asplenium montanum Willdenow

Mountain spleenwort

Etymology Montanum refers to the mountains.
Description Rhizome: erect, occasionally branching, scales clathrate, to 3mm, dark brown.
Frond: 15 cm high by 5 cm wide, evergreen, monomorphic, blade/stipe ratio: 1:1 or less.
Stipe: purple-brown at base, fading to green , dark brown, narrowly deltate scales at base grading into multicellular hairs, vascular bundles: 2 C-shaped, back to back, uniting to 1 upwards to an X-shape.
Blade: 2-pinnate at the base, said to be occasionally more divided, always less upwards, oblong-triangular, leathery, dull, commonly with tiny glandular hairs and a few linear scales.
Pinnae: 6 to 9 pair, opposite to alternate, anadromic, stemmed, variable in shape; margins serrate or creanate; veins free, forking.
Sori: linear, along a vein, w-6 on each segment, indusium: translucent, pale tan, fimbriate, hidden by sporangia at maturity, on one side of the sorus, opening toward the middle of the segment, sporangia: brown.
Culture Habitat: crevices in sandstone or other acidic rocks. Distribution: eastern United States. Hardy to -30°C, USDA Zone 4.
Asplenium montanum
Asplenium montanum. Frond and fertile pinna.  Illustration by Edgar Paulton, from How to Know the Ferns and Fern Allies, John T. Mickel, © 1979 Wm. C. Brown Co.
Asplenium montanum
Asplenium montanum, a dried specimen from Vinton County, Ohio.  Jaknouse at Wikipedia
Valid XHTML 1.0     Reports of errors and omissions appreciated: toms AT hardyfernlibrary.com (please replace the AT with @)