178 POLYSTICHUM ANGULARE. 



spreading, distinctly biserrate, and the auricle lobate, with tlio 

 shallow lobules biserrate. A brief-pinnuled, but profoundly 

 lobed form. 



Variabile, Moore. — Found at Barnstaple, Devonshire, by 

 Mr. C. Jackson. A Fern of large size, having ramose pinna^. 

 The distinctive feature of this variety is the very unequal 

 branching of the pinna;; some are divided near their base, 

 others only at the apex; then again others are unbranched, 

 and others are abbreviated (whether branched or unbranched.) 

 Some of the pinnules are depauperated, and others normal; 

 the latter are larger, acute, and dentate, as in the variety 

 Biserratum, 



Pyramidale, Moore. — Found several years ago at Nettle- 

 combe, in Somersetshire, by Mr. Elworthy. A well-marked 

 variety, having the base of the frond broadest, and having a 

 pyramidal or elongate-triangular outline. The fronds (exclusive 

 of the stipes) exceed tAvelve inches in length. The pinna?, 

 which are dense, aie five inches in length in the basal pair, 

 and four inches in length in the second pair. The pinnules 

 are oblique and stalked, the basal ones being profoundly jiin- 

 natifid, with ovate-toothed lobes. The upper portion of the 

 pinnules is biserrate, and the teeth acute. 



Calcaeatum, WoUastoti. — Found in Devonshire, by Mr. G. 

 B. Wollaston. This variety is an interrupted form of dwarf 

 habit. The small pinnules, where perfectly formed, have 

 coarse, lengthy, spiny serratures. Towards the apex of the 

 frond the pinnaj arc irregularly abbreviated, and their pinnules 

 irregularly depauperated. The main rachis is also arrested, 

 and is in the form of a small horn or spur amongst the 

 misshapen pinnse. 



PrtEMORSO-pulchrum, Moore. — Found at Nettlccombe, by 

 Mr. Elworthy. A pretty variety, having intermediate characters 

 between Pulchrum and Prcemorsitm. It is a dwarf form, Avith 

 small pinnules. In the lower portion of the frond the pinnules 

 are inciso-lobate, with serrated lobes, whilst towards the apex 

 they are decurrent, and misshapen in a greater or less degree, 

 forming irregular and more or less confluent pinnae. 



