ATHYRIUM FILIX-FOiMINA 



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. — These 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 Frizellim. 



Magni-capitatum. — Raised by Stansfield from acrocladon ; 

 fronds flat, but otherwise branched like parent ; a splendid 

 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, N.B., 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. caudiculatum. — 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. A small 

 grandiceps. 



AVV 



Fig. 86. 

 A. f. f. mesembryanthemoides. 



