POLYSTICHLM AXGULARE. 



119 



Fig. 1)3. 



Levidense, WoUaston. (Fig. 93.) — This may be considered 

 as Senrifripinnaium, only of a different normal habit, and 

 therefore the name must drop. 



AcuTO-GRACTLE, Wollastoii. (Plate XIX. — A.) — Found near 

 Ottery St. Mary, Devonshire, by Mr. G. B. WoUaston, of 

 Chiselhurst. An interesting dwarf Fern. The plant much 

 resembles the variety Gracile^ but in which the pinnules are 

 not so linear. The frond and pinnae normal. Pinnules acute, 

 slender, and having the lobes pointed. Deep grassy green in 

 colour. The coloured illustration is from a frond kindly sent 

 bv Mr. Wollaston. 



Alatum, Moore. (Plate XIX. — B.) (also Polystichum 

 acuJcatum, tar. alatum of Moore, in his Handbook.) — An 

 extraordinary form found in Somersetshire by Mrs. Archer 

 Thompson, and subsequently in Devonshire by Mr. AVoUaston. 

 This Fern is remarkable for the pinnules being all joined 

 together by a well-developed wing, on either side the secondary 

 rachides, on which the pinnules are decurrent. The fronds 

 are somewhat dwarf, and lanceolate in form. The pinnules are 

 more pointed and tapering than in the normal form, the anterior 

 side being most developed; the margin of the pinnules cut into 

 rounded teeth, which are bristle-pointed. !My thanks are due 

 to Mr. Wollaston, for fronds. 



