. British ferns and their varieties. Ferns. ATHYRIUM FILIX-F(EMINA 107 and also the plumose type, indicates the possibility that the Oxford parent might have arisen from the original Irish find, though of course this can only be surmised. K. CRISTATUM.—A remarkably pretty, but so far small, crested form, raised quite accidentally by the writer, several years after vain attempts at a cross. The prothallus bore no less than seven plants, six of which survived separation. All are exactly alike, true Kalothrix, plus crests, and with the same tendency to slight partial reversion. K. FOLiosuM.—Divis
. British ferns and their varieties. Ferns. ATHYRIUM FILIX-F(EMINA 107 and also the plumose type, indicates the possibility that the Oxford parent might have arisen from the original Irish find, though of course this can only be surmised. K. CRISTATUM.—A remarkably pretty, but so far small, crested form, raised quite accidentally by the writer, several years after vain attempts at a cross. The prothallus bore no less than seven plants, six of which survived separation. All are exactly alike, true Kalothrix, plus crests, and with the same tendency to slight partial reversion. K. FOLiosuM.—Divisions wider than in Kalothrix, and when it reverts, it does so to the normal. K. LINEARIS.—A distinct form raised by H. Stansfield ; sub- divisions longer. K. PLUMOSUM.—This is the plumose form above referred to as raised from Kalothrix by Messrs. Stansfield. Laciniatum.—Very fine divisions. L. ELEGANS, L. RAMULOSUM.—Thesc are crosses made by Messrs. Stansfield between Craigii and the Horsfall plumosum; elegans has cruciate pinnules and no crests, but ramulosum is practically a multifid Horsfall. Laxo-cristatum.—Found by W. H. Phillips in Co. Down ; long lax pinnules, crests small. LuNULATUM.—A synonym for Frizellice. Magni-capitatum.—Raised by Stansfield from fronds fiat, but otherwise branched like parent ; form. Medio - deficiens (abasilobum). — Characterized by abortion, partial or entire, of subdivisions adjacent to mid- ribs of frond and pinnae, an open space being thus left. In a form found by the writer, near Wigton, , this is so regular even in the pinnae that the Fern is very pretty, but as a rule it is irregular in the many finds so named, and hence they are of little value. M. —Found in Ireland by W. H. Phillips. Besides the above character, the tips of the pinnae run out into inch-long even tails, prettily set with bristles. Mesembryanthemoides (Fig. 86).— Found by Mr. Clapham ; a dwarf form, with heavy bunch crest to frond.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectferns, bookyear1912
