e 4. Aspidium. 1. FILICES. Pl.end.cr. 



P. Dryopteris, Dickson, Dried PI. IQ ; Bolt. Fil. 53. 

 Dryopteris Tragi, Ger. em. 1135. 

 Filix pumiia saxiitilis jjrima Clusii, Park. 1043. 

 Pol. calcareum. Smith, Fl. Br. 1117. 



Treefern. Rigid S-branched pohipody. 



Mountainous heaths in chalky soils ; peren. July. 



Root shorter and thicker than P. pulchelluni ; frond stifFer 

 and more scaly at the basej leaves half the size, rather 

 upright. 



C. AspiDiACE^. Sori round ; involucrum umbilicated 

 or renilbrm, and either attached by the centre and open 

 all round, or attached by one side and open on the other 

 side. 



IV. 4. ASPIDIUM. Swartz, Schrad. Journ. Sh'eldfern. 

 Sori round; involucra kidneyshape, umbilicate, fixed in 

 the centre, open all round. 



1. Aspidium aapemin. Rough shield fern. 

 Frond pinnate; siipes scaly; pinnce lanceolate, falcate, 



acute, ciliate, serrate, the base eared above, cut out below, 

 upper ones only fruitbearing, under surface chaffy; son 

 solitary. 



Loiichitis aspera major, Rati Syn. 118,2 ; Ger. em. 1140, 

 Poly podium Lonchitis, Linn. S. P. 1548. 

 Polystichum Lonchitis, Roth Germ. 3, 71. 

 Moyal polypody. Great spleenwort. Spleenwort polypody. 



Cleft of rocks ; perennial; May, June. 

 Frond 4 — 6 in. high, erect, narrow. 



2. Aspidium odoriferum. Scented shieldfern. 

 Frond pinnate; pinnce lanceolate, smooth, beneath resino- 



glandular, pinnatifid ; lobes lanceolate, obtuse, not notched, 

 the lower ones rather longer ; sori marginal, running to- 

 gether. 



Filix mas ericeti Dunsrtiore Petiver}, Rail Syn. 122. 



Polypodium Tliclypteris, Huds. 457. 



P. Oreopteris, Ehrh. Crijp. 



P. moiitanuin, Wiird. Prod. 883. 



Polysficluim montamini, Ruth Germ. 3, 74. 



Aspidium Oreopteris, Swarlz Syn. Fit. 50. 



Heath polypody. 



Mountainous heaths and dry woods ; peren. July, 

 Root large, fibrous, scaly ; J'rond 3-4 feet high, lanceo- 

 late; pinnce beneath smooth, covered with numerous golden 

 resinous spots; sori numerous; involucra extremely thin, 

 umbilicate, torn, withering quickly. 



