THE BROAD PRICKLY-TOOTHED BUCKLER FERN. 223 
THE BROAD PRICKLY-TOOTHED BUCKLER FERN. 
LASTREA DILATATA. 
L. fronds ovate, subtriangular, or oblong-lanceolate, bipinnate, 
with the pinnules pinnate or pinnatifid, spinosely mucronate-serrate ; 
scales of the stipes numerous, lanceolate, entire or fimbriate, usually 
dark-centred ; indusium fringed with stalked glands. 
— (type) : fronds ample, ovate, bi-tripinnate ; scales of the stipes 
entire, strongly two-coloured, 7. e., with a dark centre and paler 
margins; indusium prominent. [Plate XLIII. ] 
LASTREA DILATATA, Presl, Tent. Pterid. 77. Newman, Nat. Alm. 1844, 23. 
Babington, Man. Brit. Bot. 4 ed. 422. Sowerby, Ferns of Gt. Brit. 25, t. 13. 
Moore, Handb. Brit. Ferns, 3 ed. 194; Id., Ferns of Gt. Brit. Nature 
Printed, t. 22. 
LASTREA MULTIFLORA, Newman, Hist. Brit. Ferns, 2 ed. 215. Deakin, Florigr. 
Brit. iv. 113, fig. 1613. 
ASPIDIUM DILATATUM, Smith, Fl. Brit. 1125 ; Id., Eng. Fl. 2 ed. iv. 280; Id., 
Eng: Bot. xxi. t. 1461. Swartz, Syn. Fil. 420. Fee, Gen. Fil. 291. Met- 
tenius, Fil. Hort. Bot. Lips. 93. Tenore, Att. Accad. del R. Inst. Sc. Nat. 
Napol. v. (reprint 18, t. 2, fig 3). Lowe, Nat. Hist. Ferns, vi. t. 27. 
ASPIDIUM SPINULOSUM, Swartz, Schrad. Journ. Bot. 1800, ii. 38, in part ; Id., 
Syn. Fü. 54, in part, 420. Smith, Fl. Brit. 1124; Id., Eng. Bot. xxi. 
t. 1460; Id., Eng. Fl. 2 ed. iv. ‘279, in part. Willd. Sp. Plant. v. 262. 
Hooker & Arnott, Brit. Fl. 7 ed. 586 (excl. y.) Bentham, Handb. Brit. 
Fl. 630, in part. Fries, Sum. Veg. 82. 
ASPIDIUM SPINULOSUM, v. DILATATUM, Link, Fil. Sp. 106. A. Gray, Man. 
Bot. North. U. States, 2 ed. 597. 
ASPIDIUM SPINULOSUM, ô., Ruprecht, Dist. Crypt. Ross. 38. 
ASPIDIUM CRISTATUM, Fl. Wett.; according to Steudel. 
ASPIDIUM CARTHUSIANUM, Steudel, Nomenel. Bot. 61. 
PoLYPODIUM DILATATUM, Hoffmann, Deutschl. Fl. ii. 7. 
PoLYPODIUM oristatum, Hudson, Fl. Ang. 457. Hoffmann, Deutschl. Pl. 11.8. 
Bolton, Fil. Brit. 42, t. 23. 
POLYPODIUM CARTHUSIANUM, Villars, Hist. des Pl. Dauph. iii. 842, according to 
Willdenow. 
POLYPODIUM MULTIFLORUM, Roth, Catalect. Bot. i. 135. 
POLYSTICHUM MULTIFLORUM, Roth, Fl. Germ. iii. 87. 
POLYSTICHUM sPINULOSUM, De Candolle, Fl. Franç. ii. 561 (excl. syn. Swartz). 
Ledebour, Fl. Ross. iv. 515, in part. 
POLYSTICHUM SPINULOSUM, B. DILATATUM, Koch, Synops. 2 ed. 979. 
POLYSTICHUM DILATATUM, De Candolle, Fl. Franç. v. 241. 
NEPHRODIUM CRISTATUM, Michaux, Fl. Bor. Amer. ii. 269 ; according to Pursh. 
NEPHRODIUM DILATATUM, Desvaww, Ann. de Soc. Linn. Paris, 261. 
DRYOPTERIS DILATATA, A. Gray, Man. Bot. North. U. States, 1 ed. 631. 
LoPHODIUM MULTIFLORUM, Newman, Phytol. iv. 971; Id., 1851, App. xvii; 
Id., Hist. Brit. Ferns, 3 ed. 147 (excl. syn. Presl). 

