6o8 FILICES 



a form not generally described by British botanists, unless it be included 

 under the term angulare, from which it can scarcely be distinguished, 

 except by its rigid growth and leathery texture. . . . The whole of the forms, 

 with hundreds of others intermediate, grow in almost every lane of the 

 parish. . . . My experience here (and I have rarely met with any locality 

 more favourable for the study of our common Aspidia) is, that it is very 

 unusual to meet with what may be termed a luxuriant specimen of anf/idure 

 which has not at least the first upper pinnule more or less subdivided, 

 although this is not mentioned in the Studtnfs Flora, except under aculeatuin , 

 which, Dr. Hooker says (evidently alluding to A. angulare), is " 2-3 pinnate " ; 

 this latter is never the case with aculeatum, which, in its most highly 

 developed state, i. e. with stalked pinnules, has only the inner and, soraetimes, 

 the outer edge of its first upper pinnule spinulose-serrate. H. Reeks, F.L.S.^ 

 See Linn. Soc. Journ. xiii. (1871) 6$. 



In the Oxfordshire Flora I kept lobatum as a distinct species from aculeatum, 

 but have now followed Syme in treating one as a variety of the other ; it is, 

 perhaps, an open question whether angulare should not also be merged 

 with it. 



If the original trivial name were adhered to, it would appear that the 

 name P. aculeatum, Roth, should be given as the type (lobatum) and a new 

 varietal name be given to Syme's aculeatum. 



P. aculeatum is found in all the bordering counties. 

 P. ang-ulare, Presl, Tent. Pterid. 83 (1836). 



Aspidium angulare, Kit. in Willd. Sp. PI. v. 257 (1810). Polypodium 



aculeatum, Huds. Fl. Angl. 459. Aspidium aculeatum, Sveartz in 



Schrad. Journ. ii. (1800) 37. 



Top. Bot. 514. Syme, E. B. xii. 95, t. 1861. Nyman, 865. Fl. Oxf. 360. 



Native. Septal. Dry woods, shady hedge-banks. Very local. P. 



July-August. 

 First record. Newbuiy, Prof. J. Bohart in Herb. Du Bois at Oxford, 1690. 

 Mr. Keeks exhibited a series of forms collected at E. Woodhay in 

 Hampshire which he thought showed a connexion with P. aculea- 

 tum ; see Journ. Linn. Soc. 65, 187 1. 

 2. Ock. Powder Hill Copse, Bosivell in FL Oxf. 

 4. Kennet. Near Newbury, Bobart. Aldermaston. Inkpen. 

 P. angulare is recorded for all the bordering counties. 



DRYOPTERIS, Adans. Fam. PI. ii. 20 (1763). 



Lastrea, Presl, Pterid. 73 11836). Nephrodium, Rich, in Michx. Fl. 

 Boi'. Amer. ii. 266 (1803). 



D. Tlielypteris, Asa Gray, Man. Bot. U. S. 630 (1848). Marsh Fern. 



Lastrea Tlielypteris, Presl, Tent. Pterid. 76 (1836). Acrostichum Tlielyp- 

 teris, Linn. Sp. PI. 1071 (1753). Aspidium Tlielypteris, Swartz in 

 Schrad. Journ. ii. (1800) 4®. 



Top. Bot. 515. Syme, E. B. xii. 52, t. 1848. Nyman, 866. Fl. Oxf. 362. 



Native. Uliginal. Marshes. Extremely rare. P. 



First record. Filix non ramosa minor syhatica repens, nobis. Dryopteris, 

 Penae et Lobel. In locis paludosis, praesertim sylvaticis, ad 



