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Published In: Species Plantarum. Editio quarta 5(1): 342. 1810. (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 7/9/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Native


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2. Asplenium montanum Willd. (mountain spleenwort) Pl. 1e,f; Map 2

Leaves 3–20 cm long, monomorphic. Petioles dark brown to purplish black in the lower 1/3–1/2, green above, not shiny. Leaf blades 2–3 times pinnately compound, lanceolate to deltoid in outline. Pinnae alternate on the rachis, 6–35 mm long, triangular to lanceolate, the pinnules linear to oblong or ovate and often deeply lobed, at least toward the base of the leaf blade, the pinna bases not overlapping the rachis. Veins not anastomosing. Spores 64 per sporangium. 2n=72. June–September.

Known only from a single collection from Montgomery County (eastern U.S., most commonly in the Appalachians). Ledges and crevices of shaded to somewhat exposed sandstone bluffs.

The Missouri population has not been relocated and the species is now perhaps extirpated there. The Missouri station is at the species’ western distributional limit and is disjunct, with the closest populations in western Kentucky.

This diploid species hybridized with A. platyneuron to form the tetraploid A. bradleyi and with A. rhizophyllum to form the tetraploid A. pinnatifidum. Sterile, triploid backcrosses with A. bradleyi (A. ¥wherryi D.M Sm. et al.) and A. pinnatifidum (A. ¥trudellii Wherry) have not been reported from Missouri and are unlikely in view of the mountain spleenwort's rarity in the state.



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