586 



CVIII. POLYPODIACE^. 



\_C9/st6pter{s. 



teeth broad and triangular. Involucre slightly glandular on the mar 

 '^\"'rf^ ^ reticulation quite unlike that of A. spinulosum. This 

 plant differs from the following in having a permanent large convex 

 and rounded involucre, resembling that of J. F. mas, covering the 

 mass ot capsules at every stage, with an attachment as truly central 

 as that of J, cristatum. It agrees also with F. mas in the ohlinue 

 insertion of the pinnas on the rachis, so that they lie in very different 

 planes ; but it differs essentially in not having the lower pinna; <n-a 

 dually diminished, the frond resembling in circumscription that of A 

 cristatum. In the shape of the pinnules and mode of toothino- and 

 subdivision it more resembles some states of Asplenium Filix fc^mina • 

 Mr. Wilson: to whom we are indebted for the specific character. 



10. A. spinulosum Willd. (pricMy -toothed S.) ; fronds bi- 

 tripmnate, pinnules oblong distinct inciso-pinnatifid, segments 

 mucronate-serrate, stipes chatry, involucre toothed evanescent. 



a., ironds ovate or oblono-. 



Hook 



lower primary pinnaa sub-bipinnate. 

 t. 1460?: ^ ■ - - 



... , A. spinulosum E. B. 



. /^- ironds larger ovate, lower primary pinnas bi- 

 tripinnate, pinnules often convex above. A dilatatum Willd. ; 

 £. B. t. 1461. A dumetorum Sm. Polypodiuni dilatatuni 

 Hojfm. Lastrea Presl Lophodium glandulosum. Newm. Brit. 

 Ferns, 3., p. 154., no figure (frond glandular beneath). — y'. 

 fronds triangular-ovate, })innules generally concave above often 

 minutely glandular. A. dilatatum var.recurvum^ree. Lastrea 

 recurva Newm. L. Fcenisecil Bah. Neplirodium Fcenisecii 

 Lowe? (in part). — L pinnules and segments very unequal ia 

 Size and in their spinulose serratures (a monstrosity ?). 



Moist woods, i\lder-cars and shady and rocky places, abundant. 

 a. most frequent in rocky and suhalplne countries. — ^3. generally ia 

 moist woods.— 7. Ireland, very common. Cornwall, Sussex, Cum- 

 berland {Bree). Arran in Scotland.— 5. Bingiey Wood, near Halifax; 

 About Norwich. Glen Falloch, Scotland. — An extremely sportive 

 plant , it must be confessed ; but an attentive observer of nature 

 will not find It difficult to trace the different states passing into each 

 other, so that we cannot in our herbarium bring all our numerous 

 specimens under the above forms. The texture of the frond, too, is 

 highly variable. It is the most compound of all our British Aspidia. 

 In stony places on the Scottish mountains, especially the Braedalbane 

 and Cairngorm ranges, the frond is almost ovate, but with nearly 

 parallel sides, the whole compact in its ramification and loaded with 

 iructihcations. We have a cultivated specimen from Mr. Moore of 

 Lophodium glanduhsum of Mr. Newman, from the Epping station, 

 which we refer to our var. j8. with little hesitation. 

 E. Bot. t. 1260, belongs perhaps to our 7. 



The figure in 



6 Cystoptekis BeruTiardi. 



(Tab. X. f. 1 .) 



>^on roundish. Involucre inserted, by its broad cucullate 

 base, at the under-side of the sorus, opening by a free, generally 



1 We may refer to our last ed.. p. 570, for observations oa this species. 



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