BEAUTIFUL FERNS. 
23 
shorter than the next ; secondary pinnoe 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, FI. Am. Sept, ii., p. 663. — Muhlenberg, Catal., 
p. 102. — Barton, Compend. FI. Philad., ii., p. 208. — Polypodium inter- 
medium, Muhlenberg, MS. — Lastrea intermedia, Presl, Tent. Pterid., p. 
77. — Dryopteris intermedia. Gray, Manual, ed. i., p. 630. — Darlington, 
FI. Cestr., ed. ill., p, 396. — Lastrea spinulosa, /?, Moore, Index Fib, 
p. 94. — Aspidium spimclosum genuimtm Americanum, No. 2, Milde, 
Fil. Eur. et Atl., p. 134. — Aspidium A?nericanwn, 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., xxvi., ii., p. 527. — Polystichum spinu- 
losum, var. dilatatum, Koch, Syn. Id. Germ, et Helv., ed. ii., p. 975 ; 
ed. iii., p. 734. — Nephrodium spimilosum var. dilatatum. Hooker, Brit. 
Ferns, t. 19; Sp. Fil., iv., p. 127. — Hooker & Baker, Syn. Fil., p. 
