THE FEMALE BUCKLER FERN. 
THE FEMALE BUCKLER FERN, or MARSH FERN. 
LASTREA THELYPTERIS. 
L. fronds lanceolate with a broad base, pinnate, glandless; pinne 
linear-lanceolate, deeply pinnatifid; lobes oblong, their margins 
revolute in the fertile fronds, the divisions of which thus appear 
contracted and more acute; caudex creeping. [Plate XXIX.] 
LASTREA THELYPTERIS, Bory, Dict. Class. d'Hist. Nat. ix. 233. Presl, Tent. 
Pierid. 76, t. 2, fig. 16. Deakin, Florigr. Brit. iv. 96, fig. 1605. Babington, 
Man. Brit. Bot. 4 ed. 421. Newman, Hist. Brit. Ferns, 2 ed. 183. Moore, 
Handb. Brit, Ferns, 3 ed. 97; Id., Ferns of Gt. Brit. Nature Printed, t. 29. 
Sowerby, Ferns of Gt. Brit. 16, t. 7. Hooker, Gen. Fil. t. 45 A, fig. 2. 
LASTREA PALUSTRIS, J. Smith, Cat. Cult. Ferns, 56. 
ASPIDIUM THELYPTERIS, Swartz, Schrad. Journ. Bot. 1800, ii. 40; Id., Syn. 
Fil. 50. Smith, Fl. Brit. 1119 ; Id., Eng. Fl. 2ed. iv. 272. Hooker & Arnott, 
Brit. Fl. 7 ed. 584. Mackay, Fl. Hib. 340. Bentham, Handb. Brit. Fl. 
629. Schkuhr, Krypt. Gew. 51, t. 52. Willdenow, Sp. Plant. v. 249. 
Sprengel, Syst. Veg. iv. 104. Fries, Sum. Veg. 82. Fée, Gen. Fil. 291. 
Mettenius, Fil. Hort. Bot. Lips. 99. A. Gray, Man. Bot. North U. States, 
2 ed. 597. Lowe, Nat. Hist. Ferns, vi. t. 18. 
ASPIDIUM PALUSTRE, Gray, Nat. Arr. Brit. Pl. ii. 9. 
ACROSTICHUM THELYPTERIS, Linneus, Sp. Plant. 1528. Bolton, Fil. Brit. 
78, tt. 48, 44. j 
POLYPODIUM THELYPTERIS, Linnæus, Mant. Plant. 505. Hudson, Fl. Ang. 
457. Flora Danica, t. 760. Sturm, Deutschl. Fl. (Farnn.) i. t. 5, 
POLYPODIUM PALUSTRE, Salisbury, Prod. 408. 
POLYPODIUM PTEROIDES, B, Lamarck, Fl. Franç. i. 18. 
POLYSTICHUM THELYPTERIS, Roth, Fl. Germ. iii. 77. Koch, Synops. 2 ed. 977. 
Ledebowr, Fl. Ross. iv. 513. 
NEPHRODIUM THELYPTERIS, Strempel, Fil. Berol. Synops. 32. 
ATHYRIUM THELYPTERIS, Sprengel, Ani. (Eng. ed. 147). 
THELYPTERIS PALUSTRIS, Schott, Gen. Fil. (sub t. 10, in note.) 
HEMESTHEUM THELYPTERIS, Newman, Phytol. 1851, App. xxii; Id., Hist. 
Brit. Ferns, 3 ed. 193. 
DRYOPTERIS THELYPTERIS, A. Gray, Man. Bot. North U. States, 1 ed. 630. 

Caudex extensively creeping, sparingly branched, producing fronds 
at intervals, slender, blackish-brown, scaly at the growing point. 
Scales few, pale brown, ovate-lanceolate. Fibres numerous, dark 
brown, much branched, smooth, or tomentose. 
Vernation ciremate. 
Stipes as long as or longer than the leafy portion in the fertile 

