Home Flora of Missouri
Name Search
!Asplenium ruta-muraria L. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenSearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font

Published In: Species Plantarum 2: 1081. 1753. (1 May 1753) (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


Export To PDF Export To Word

7. Asplenium ruta-muraria L. (wall-rue) Pl. 1a,b; Map 7

A. cryptolepis Fernald

A. ruta-muraria var. cryptolepis (Fernald) Wherry

Leaves 2–10 cm long, monomorphic. Petioles green except sometimes brown at the very base, not shiny. Leaf blades 2–3 times pinnately compound, deltoid-ovate to obovate or lanceolate in outline. Pinnae alternate on the rachis, 7–30 mm long, triangular to obovate, the pinnules spatulate to nearly diamond-shaped and usually toothed to shallowly lobed at the tip, rarely deeply lobed at the base, the pinna bases not overlapping the rachis. Veins not anastomosing. Spores 64 per sporangium. 2n=144. May–September.

Scattered in the Ozark and Ozark Border Divisions (eastern U.S. and adjacent Canada; Europe, Asia). Pockets of dolomite and limestone bluffs, frequently in fairly exposed conditions; also on shaded dolomite boulders along streams.

The relationship of North American plants to those in Europe, where both diploid and tetraploid races of the species occur, are not well understood. American plants have at various times been treated as a separate species, a variety of the European species, or considered unworthy of taxonomic recognition. As there are no clear morphological distinctions between European and North American plants, they should continue to be treated as a single taxon until more detailed studies are completed. In Europe, the tetraploid cytotype of A. ruta-muraria is treated as ssp. ruta-muraria.

No hybrids involving wall-rue have been reported from Missouri. However, elsewhere it has been documented to hybridize with A. platyneuron (A. ¥morganii W.H. Wagner & F.S. Wagner), A. rhizophyllum (A. ¥inexpectatum E.L. Braun ex C.V. Morton), and A. trichomanes (A. ¥clermontae Syme). Of these, the last is the least likely to be found in Missouri, as wall-rue and maidenhair spleenwort do not grow in close proximity in the state.



© 2018 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110