xxii Edward Neiomcui 



than the first lower, both slightly longer than the second 



and following pinnules : ultimate divisions without a point, 



Ohs. — This genus has been carefully defined by Schott under the 



name of Thelypteiis ; but I object, for the reason before stated, to 



the transfer of a name from a species to a genus. 



Hemestheum Thelypteris. 



Acrostichum Thelypteris, Linn. Sp. PI. 1528 ; Bolt. Fil. 



Brit, part ii. 78, t. 43, 44 ; With. Bot. Arr. Veg. 649. 

 Pol}T3odium Thelypteris, Linn. Mant. 505; Huds. Fl. Ang. 



457 ; With. Arr. 776 ; ? Lightf. Fl. Scot. 674. 

 Polysticlmm Thelypteris, Roth. Fl. Germ. iii. 77. 

 Aspidium Thel^^jteris {Swartz), Sm. E. F. iv. 285 ; Mack. 



Fl. Hih. 340 ; Hook, and Am. 569, (exel. syn. "E. B. 



1018," wliich represents G. Phegopteris). 

 Lastrea Thel3T3teris {Bory), Neivm. N. A. 19, F. 18S; Bab. 



409. 

 Thelypteris palustris, Schott, Fil. 



Rhizoma creeping ; fronds of two kinds, both erect, on 

 long smooth stipes, lanceolate, pinnate ; pinnae pmnatifid, 

 lower pinnae equalling the rest in length ; pinnules blunt, 

 entire, in fertile fronds with convolute margins covering 

 the capsules ; lateral veins branched; involucre small, and 

 present on scarcely more than half the clusters ; capsules 

 in circular clusters, scarcely marginal. 



In marshes, very local. 



Heiviestheum (Oreopteris) montanum. 



Polypodium fragrans, Linn. Mant. ii. 307 ; Huds. Fl. Ang. 

 457, (2nd edition). The reader will see that the al- 

 tered description no longer agrees with L. rigida. 



1781. Polypodium montanum, Vogler, Diss, de Pol. mant. 



1788. Polypodium Oreopteris, Ehrh. Beitr. ; Dicks. Tr. 

 Linn. Soc. i. 181, (1791); With. Arr. 775. 



Polipodium Thelypteris, Bolt. Fil. Brit. 40, t. 22. 



Polj'^stichum montanum, Roth. Flor. Germ. iii. 74. 



Aspidium Oreopteris {Swartz), Sm. E. F. iv. 286, E. B. 

 1019; Mack. Fl. Hih. 339 ; Hook, and Am. 569. 



Lastrea Oreopteris, Newm. N. A. 17, F. 187 ; Bah. 410. 



