from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any of numerous widely distributed evergreen ferns of the genus Asplenium, having undivided to featherlike fronds with oblong to linear sori arranged along the veins.
from The Century Dictionary.
- noun Any fern of the genus Asplenium.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Bot.) Any fern of the genus Asplenium, some species of which were anciently used as remedies for disorders of the spleen.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Any of a number of types of
fernsin the genus Asplenium
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun any of various chiefly rock-inhabiting ferns of the genus Asplenium
from The American Heritage® Dictionary of the English Language, 4th Edition
Farmsteads and hamlets are protected by old walls from which spleenwort and polypody ferns grow.
A spiral stairway, within concave walls sprouting spleenwort ferns and pennywort, leads to a look-out at the top of the tower bounded by pinnacles and a parapet encrusted with lichen.
Swelling emerald mosses protrude between vertical groves of fern and spleenwort.
Foxgloves, bright polypody ferns and rushes thrive in the hollows of surface tin workings while wheel pits, settling tanks and buddles associated with the extraction of tin and china clay are masked by scrub, and the derelict structures colonised by spleenwort ferns and moss.
Localized species of note include red broomrape Orobanche alba, sea spleenwort Asplenium marinum and oyster plant Mertemsia maritima.
Nearly all agree that the lady fern, with its variously curved sori, should be placed here, and many others would place the silvery spleenwort in the same genus, partly because of its frequently doubled sori.
This rare and delicate little plant bears a rather close resemblance to the maidenhair spleenwort, which, however, has dark stipes instead of green.
In regard to the last member of the group, the narrow-leaved spleenwort, there is more doubt.
Still other species of ferns are known to hybridize more or less, as we saw in the case of Scott's spleenwort.
The pinnæ of a frond are often pinnátifid when the frond itself is pinnate; and a frond may be pinnate in its lower part and become pinnátifid higher up as in the pinnátifid spleenwort just mentioned (Fig. 3).