THE POLYSTICI-IUMS 199 



D. grandiceps Carbonell. — Heavy crested head. 



D. imbricatum Birkenhead. — Very dense, congested fronds. 



D. laxum Phillips.— Found in Ireland by W. H. Phillips ; fine 

 lax variety. 



D. l. Wills. — Found S. Devon by Dr. Wills ; similar but distinct. 



D. longipinnatum Carbonell. — Lower pinnules very long ; 

 slender, graceful plant. 



D. perfectum Jones. — A lovely form ; well named. 



D. plenum Jones. — Very fine foliose form. 



D. productum Fox. — Very fine form. 



D. quadripinnatum Jones. — Extra finely divided. 



D. robustum Moly. — Found S. Devon by Moly ; a grand plant, 

 perhaps the largest of all. 



D. stipulatum Carbonell. — A beautiful imbricate form, 

 ultimate divisions plainly stalked. 



Flabelli-pinnulum. — Found in Dorset by Dr. Wills ; pinnules 

 curiously fan-shaped, and when in form, the Fern is unique, but 

 it is apt to revert somewhat at times. 



Fig. 224, P. ang. Jlexuosum. 



Flexuosum (Fig. 224). — Found in Devon by Mr. C. Jackson ; 

 very erect, the fronds and pinnae very sinuously twisted ; pinnules 

 acutely serrate ; a more marked form was found by Mr. Wollaston 

 in Somerset. 



Folioso-latipes. — Found by Parsons in Devon ; fine foliose, 

 broad-based form. 



