Asplenium ruta-muraria L. - Wall-rue


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Asplenium ruta-muraria - (image 1 of 3)



Family: Aspleniaceae


Calcareous cliffs, ledges and rocks.


Sometimes with Pellaea atropurpurea


Circumboreal, south in North America to MA and VT west to MI, south to AL, IL, MO, and AR.


Rhizome 1.5-2 mm diameter with lanceolate scale 1.5-4 mm long; leaves spreading, 4-17 mm, petiole to 7 cm, blade green, onate or rhombix, firm, bipinnate or bipinnate-pinnatifid below, pinnate above, rachis green; pinnae alternate, in about 6 pairs, on petiolules 2-5, the basal ones with 3-6 finely toothed and sometimes deeply lobed pinnules to 12 mm.


Spores produced July to Fall

Wetland Indicator: UPL

A small, easily overlooked fern usually found on limestone cliffs but sometimes on boulders and even rock walls.


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




Michael Hough 2018