Plate 18. 
NEPHRODIUM (Lasteea) spinulosum, Sw., 
a. BIPINNATUM. 
Prickly Buckler-Fern; bipinnate var. 
Nephrodium (Lastrea) spinulosum; caudex short, stout, suberect, paleaceous; 
stipites tufted, stramineous, brown at the base, scaly; fronds ovate or ob¬ 
long-ovate, one to two feet and more long, bi-tripinnate; primary pinnae 
rather distant, upper ones from a broad subtruncate 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 pinnatifido-serrate ; sori chiefly on the upper half of the frond, in two 
rows upon each pinnule, involucres entire or fringed with glandular hairs. 
a. bipinnatum; scales of the stipes ovato-acuminate, brown, pale towards the 
margin; fronds glabrous, bipinnate; involucres entire at the margin. 
(Plate 18.) 
Asfidium spinulosum. Sw. Syn.Fil.p. 420. Schk. Fil. p. 48. £48 b and c: 
very good. Willd. Sp. PI. v. 5 . p. 252. Sm. FI. Brit. p. 1121; Engl. Bot. 
p. 1460; Engl. FI. v. 4. p. 292. HooJc. and Am. Brit. FI. ed. 7. p. 586. 
(var. a). Asa Gray, Manual of Bot. Illustr. p. 597. Chapm. FI. of Southern 
United States, p. 595. 
Lastrea spinulosa. Pr. Tent. Pterid. p. 76. Moore, Brit. Ferns, Nat. Print . 
pi. 21 (but with no creeping caudex, as in the description). 
Lastrea cristata, y spinulosa. Moore, Handb. of Brit. Ferns, p. 115 (this is 
also quoted under Lastrea cristata as var. uliginosa of it), ed. 3. p. 122. 
Polystichum spinosum. Both, FI. Germ. v. S.p. 91. 
Lophodium spinosum. Newm. in Phytol. v. 4>.p. 371. Brit. Ferns, ed. 3 .p. 157. 
Lophodium glandulosum and uliginosum. Newm. ? 
Hab. Boggy places and moist heaths in various parts of England ; but by some 
confounded with N. cristatum, by others with the var. dilatatum of A. spi~ 
nulosum. 
Viewing, as I am disposed to do, this and the three following 
subjects of this work, as varieties of one and the same species, I 
consider this among the least divided (or compound) forms of 
them, as its chief distinguishing character. The broader scales 
of the stipes and paler colour, and the entire absence of fringe to 
the margin of the involucres, are considered by some as further 
entitling this plant to specific distinction; but if I am correct in 
referring Mr. Newman’s Lophodium glandulosum here, the pre¬ 
sence or absence of minute glands is not much to be depended 
upon; and I possess all kinds of intermediate forms between 
