CRYPTOGAMIA— FILICES. Woodsia. 309 



Masses o^ capsules roundish, convex, dispersed on tlie veins 

 at the back of \\\e frond. Cover membranous and slightly 

 cup-shaped at the base, under each mass ; the margin 

 in many deep, ca])illary, obscurely jointed, taper-pointed 

 segments, incurved over the capstdes, permanent. Capsules 

 several, stalked, crowded, without any })rominent com- 

 mon receptacle, rountlish-obovate, bound by a vertical 

 jointed ring, and bursting (as it seems) irregularly at the 

 sides. Seeds numerous, kidney-shaped. 



A genus of suvoW ferns, of which two species only have hi- 

 therto been discovered. These have been generally con- 

 founded either with Acroslichum or Poltjpodhmi. Their 

 roots are fibrous. Fronds tufted, erect, stalked, pinnate, 

 pinnatilid, clothed with simple hairs, or narrow pointed 

 scales. 



The name, given by Mr. Brown, justly commemorates Mr. 

 Joseph Woods, F.L.S., an excellent practical English 

 botanist, who first illustrated our native species o^ Rosa ; 

 see vol. 2. 369, and Trans, of the Linn. Soc. v. 12. 173. 



1. W. iive?isis. Oblong Woodsia. 



Leaflets oblong, deeply pinnatifid, with oblong segments. 



W. ilvensis. Bi\ Tr. of Linn. Soc. v. 11. 173. 



Acrostichum ilvense. Linn. Sp. PL ed. 1 . 1 07 1 . ed. 2. ] 528. Fl. 



Suec. ed. 2. 37 i . Fl. Dan. t.39\. Ehrh. Crypt. 191. 

 Polypodium ilvense. Sw. Syn. Fil. 39. fVilld. Sp. PL v. 5. 198. 



" Schktdir Crypt. 16. t 19." 

 P. Marantae. Hqffm. Germ. v. 2. 5 j omitting the syn, 

 Lonchitis aspera ilvensis. Dcdech. Hist, \22l.f. 

 Filix minor ilvensis, alis asplenii. Moris, sect. 14, t.Z.f. 22; but 



not the descr. v. 3. 576. n. 22. 

 Nephrodiumlanosum. Michaux BoreaL-Amer. v. 2. 270. {not 1 98). 



On the authority of Mr. Brown. 

 On alpine rocks in Wales and the North of England. 

 Upon Glyder Vawr, near Llyn y Cwm, North Wales. Mr. W. 



Wilson. At the foot of the basaltic rocks, on the Durham side 



of the river Tees, about two hundred yards below Caldron Snout. 



Mr. James Backhouse. Near the summit of some very bold 



basaltic rocks, called Falcon Clints, about ten miles west of 



Middleton, Teesdale. Mr. S. Hadstone. 

 Perennial. July — September. 



Mr. Wilson first determined this species when he gathered it in 

 " Wales, in 1824 and 1825 ; our English specimens having been 



sent under tlie name of the following ; a very excusable error, 



when it is considered how nearly the plants are related. Roots 



