Plate 21. 
NEPHRODITJM (Lastbea) spinulosum, Sic., 
S . DCMETOKUM. 
Prickly Buckler-Fern; var. dumetorum. 
Nephrodium (Lastrea) spinulosum; caudex short, stout, suberect, paleaceous; 
stipites tufted, stramineous, brown at the base, scaly; fronds ovate or ob¬ 
long-ovate, one or two feet and more long, bi-tripinnate; primary pinnse 
rather distant, upper ones from a broad truncated base, oblong, inferior ones 
ovate, both gradually acuminate; secondary ones and pinnules close-placed, 
ovate or oblong, sessile, more or less coarsely spinuloso-serrate or pinnati- 
fido-serrate; sori chiefly on the upper half of the frond, in two rows upon 
each pinnule; involucres entire or fringed with glandular hairs. 
8. dumetorum; “frond doubly pinnate, pinnules pinnatifld, lobes with terminal 
sharp prickly teeth, common stalk scaly, involucres flat, orbicular, with a 
deep notch,” 8'm. under Aspid. dumetorum.— (Plate 21.) 
Aspidium dumetorum. Sm, Eng. FI. v. 4. p. 281. 
Lastrea dumetorum. “T. Moore , MS. in Herb. ( not L. dilatata, var, dumetorum, 
ib. Handb. of Brit. Ferns, p, 124),” according to Moore , in Brit. Ferns, Nat. 
Print. 1855 ; but the same reference is retained in Moore, Handb. of Brit. 
Ferns, ed. 3, 1857. 
Lastrea dilatata, var. dumetorum. Moore , Brit. Ferns , Nat, Print, t, 25* 
Aspidium spinulosum, ft. Hook. a?id Am. Brit. Ft. ed. 7. p. 586 (in ed. 8 it is 
given as a synonym of A. dilatatum). 
Lastrea dilatata, var. collina. “Moore, Handb. of Brit. Feyms, in part” 
Lastrea dilatata, var. maculata. Moore, Hand, of Brit. Ferns, ed. Z.p. 123, in 
part. 
Lastrea multiflora, var. collina. NeWm. Brit. Ferns, ed. 2. p. 222, “inpartf 
Lastrea collina. Newm. Brit. Ferns, ed. 2 . p, 224. 
Lastrea maculata. Deakin, Florigr. Brit. v. 4. p. 110. 
Lophodium collinum. Newm. “ App. to Phytol. 1851. xviii. (in part). Brit . 
Ferns, ed. 3 . p. 144 (in part),” (certainly not the figure at p. 145). 
Polypodium cristatura, ft. Huds. Angl. ed. 1 . p. 391 (Sm.). 
Pilix montana ramosa, minor, argute denticulata. Raii Syn. p. 124 (fide Sm.). 
Pilix alpina, myrrhidis facie, Cambrobritannica. Pink. Almag. p. 155. Phyt. t * 
89./. 4. good (Sm.). 
Hab. “Wales, summit of Mount Glyder, Mr. Lhywd / near Phanion Vellor, Br. 
Richardson; Westmoreland, Scotland, near Edinburgh, and among bushes 
in Derbyshire (J. E. Smith). 
It would be hardly doing justice to the labours of Sir James 
Smith among British Ferns, if we did not introduce a fourth 
