SPINULOSE, OR COMMON WOOD-FERN. 



shorter than the next ; secondary pinnse or pinnules ovate-oblong, acutish, 

 spreading, pinnately divided or even again pinnate; the oblong lobes 

 spinulose-toothed at the apex and somewhat along the sides ; under 

 surface minutely glandular ; sori more commonly dorsal on the veinlets ; 

 indusium beset with minute stalked and sessile glands. — Gray's Manual, 

 ed. v., p. 665. — Robinson, in Bull. Essex Inst., vii., p. 50. — Williamson, 

 Fern-Etchings, t. xxxviii. — Aspidium intermedium, Willdenow, Sp. PL, 

 v., p. 262. — PuRSH, Fl. Am. Sept., ii., p. 663. — Muhlenberg, Catal., 

 p. 102. — Barton, Compend. Fl. Philad., ii., p. 208. — Polypodium inter- 

 medium, Muhlenberg, MS. — Lastrea intermedia, Presl, Tent. Pterid., p. 

 ']']. — Dryopteris intermedia, Gray, Manual, ed. i., p. 630. — Darlington, 

 Fl. Cestr., ed. iii., p. 396. — Lastrea spinulosa, j3, Moore, Index Fil., 

 p. 94. — Aspidium spinulosum genuinum Americanum,, No. 2, Milde, 

 Fil. Eur. et Atl., p. 134. — Aspidium Americanum, Davenport, in Amer. 

 Naturalist, xii., p. 714; Catal., p. 29. 



Var. dilatatum, Hooker: — Scales of the stalk often with a dark 

 central spot ; fronds dark-green, broadly ovate or sub-deltoid, nearly or 

 quite thrice pinnate ; secondary pinnae lance-oblong, those on the in- 

 ferior side of the lowest pinnae much elongated ; indusium smooth in 

 American specimens. — British Flora, ed. i., p. 444. — Link, Fil. Hort, 

 Berol., p. 106. — Hooker & Arnott, British Flora, ed. vii., p. 586. — 

 Gray, Manual, ed. ii., p. 597. — Eaton, in Chapman's Flora, p. 595, and 

 in Gray's Manual, ed. v., p. 665.— Milde, Fil. Eur. et Atl.., p. 136.— 

 Aspidium dilatatum, Swartz, Syn. Fil., p. 420. — Willdenow, Sp. PL, 

 v.. 263. — Mettenius, Fil. Hort. Lips., p, 93; Aspidium, p. 57. — Milde, 

 in Nov. Act. Acad. Nat. Cur., xxvL, ii., p. ^2T .—Polystickum spinu- 

 losum, var. dilatatum, Koch, Syn. Fl. Germ, et Helv., ed. ii., p. 975; 

 ed. iii., p. 734. — Nephrodium spinulosum var. dilatatum. Hooker, Brit. 

 Ferns, t. 19; Sp. Fil., iv., p. 127.— Hooker & Baker, Syn. FiL, p 



