By Thomas Bruges Flower, Esq. ' 317 



Ceterach (Willd.) Rustyback. 

 Linn. CI. xxiv., Ord. i. 

 • Named from the Persian Chetherak. 



1. C. officinarum, (Willd.) common Ceterach, or Scale-fern. 

 Natolepum, Newm., 293. Asplenium, Hook. Scolopendrium, Sm. 

 Engl. Bat. t. 1244. 



Locality. Old walls, and rocks, chiefly on limestone. P. Fl. 

 April, October. Area, 1, 2, 3, 4, 5. 



iiouth Division. 



1. South-east District. " Pewsej Church-yard, and near the 

 Wharf," tlor. Marlb. Probably introduced with stone from Bath. 



2. South-midille District. Old walls at Seend, near Devizes. 



3. South-west' District. " South wall of the Park at Wilton, 

 and on a wall at Donhead St. Mary,'' Mr. James Russey. 



North Division. 



4. North-west District. Abundant on old walls at Melksham, 

 Monkton Farleigh, and South Wrashall. 



5. North-east District. Old walls at ]\Iorden,Purton,and Swindon. 

 This fern is of rare occurence in South JFilfs, but more frequent in 

 the northern portion of the county. Fronds tufted, spreading, linear- 

 lanceolate, deeply pinnatifid, or pinnate, covered beneath with dense 

 scales. Segments oblong, obtuse, waved, or slightly lobed on the 

 margin. Fronds 3 to 6 inches long, green and smooth above. It 

 often accompanies Asplenium Ruta-muraria, and Trichomanes. 



Blechnum, (Linn.) Hard-Fern. 

 Linn. 01. xxiv., Ord. i. 



Named from the Greek {blechron) or {blechnon) a kind of fern. 



1. B. boreale, (Sw.) northern Hard-fern. Engl. Bot. t. 1159. 

 Lomaria spicant, Newm., 89. 



Locality. In woods, thickets, stony and heathy places. P. Fl. 

 July. Area, 1, 2, 3, 4, 5. 



South Division. 



1. South-east District. "Landford and Whiteparish," Bev. E. 

 Sim7ns. "Ditches on Alderbmy Common/' Maion, Nat. Hist. 

 Wilts. 



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