: n
1 ! - r Nephrodium spinulosîim, “ ü e s v a u x ; " H o o k e r , Brit. Ferns, t. 18, 19 ;
Sp. Fil., iv., p. 12 7.—H o o k e r & B a k e r , Syn. Fil., p. 275.
Aspidium dilatatum T o r r e y , F 1. New York, ü., p. 496.
The forms of this species are very many, the limits by no means
agreed upon, and the synonymy inextricably complicated and uncertain,
The following appear to be the chief American varieties.
Var. vidgare :—Scales thinnish, pale-brown ; fronds light green, narrowly
oblong-ovate, twice pinnate ; pinnæ oblique to the rachis, elongated-
triangular, the lowest pair broadly triangular and having the basal pinnules
longest ; pinnules set obliquely on the midribs, oblong, sub-acute,
incisely serrate or pinnatifid with spiniiloseiy toothed lobes ; sori dorsal
on the veins or either apical or dorsal on a solitary superior veinlet ;
indusium commonly smooth and glandless. — Aspidium spimdosmn,
S w a r t /., Syn. Fil., p. 4 2 0 .—M e t t e n iu s , Fil. Hort. Lsps., p. 9 3 .—M i l d e .
in Nov. Act. Acad. Nat. Cur., xxvi., ii., p. 5 2 2 .— E a t o n , in Gray’s
Manual, ed. v., p. 6 6 5 (excl. v a r .) .— D a v e n p o r t , Catal., p. 2 8 .—W i l l
ia m s o n , Fern-Etchings. t. xxxvii. — Aspidium spinulosum genuinutn,
h l iL D E , Fil. Eur. et At., p. 1 3 2 . — Lastrea spinulosa, “ P r e s l ; ” M o o r e ,
Nat. Pr. Brit. P'erns, t. xxi.—Polystichum spinulosum, var. vidgare, Kocii,
Syn. FI. Germ, et Helv., ed. ii. ( 1 8 4 5 ) p. 9 7 9 ; ed. iii., p. 7 3 4 .— Nephrodium
spinulosum, var. bipinnatum, H o o k e r , Brit. Perns, t. 18 ; Sp.
Fil., iv., p. 1 2 7 .— Nephrodium spinulosum (type) P Io o k e r & B a k e r ,
Syn. Fil., p. 2 7 5 . (See Milde’s work for other synonymes.)
Var. intermedium. D. C. E a t o n ; — Scales tawny, fronds oblong-
ovate, twice or frequently thrice pinnate ; pinnæ spreading obliquely,
oblong-lanceolate, the lowest pair broadest and more triangular, having
the inferior pinnules moderately elongated, the basal ones a little
I
shorter than the next; secondary pinnæ 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.— G r a y ’s Manual,
ed. v., p. 665.—R o b in s o n , in Bull. Essex Inst., vii., p. 50.—W i l l i a m s o n ,
Fern-Etchings, t. xxxviii.— Aspidium intermedium, W i l l d e n o w , Sp. Pl.,
V ., p. 262. — P u r s it , f i . Am. Sept., ¡¡ . , p. 663. — M u h l e n b e r g , Catal.,
p. 102. — B a r t o n , Compend. FL Philad., ii., p. 208.— Polypodium intermedium,
M u h l e n b e r g , MS.—Lastrea intermedia, P r e s l , Tent. Pterid., p.
77.— Dryopteris intermedia, G r a y , Manual, ed. i., p. 630.— D a r l in g t o n ,
FL Cestr., ed. iii., p. 396. — Lastrea spimdosa, /?, L I o o r e , Index Fil.,
p. 94. — Aspidium spinulosum genuinum Americanum, No. 2, M i l d e ,
Fil. Eur. et Atl., p. 134.—Aspidium Americanum, D a v e n p o r t , in Amer.
Naturalist, xii., p. 7 14 ; Catal., p. 29.
Var. dilatatum, H o o k e r : — Scales of the stalk often with a dark
central spot ; fronds dark-green, broadly ovate or sub-deltoid, nearly or
quite thrice pinnate ; secondary pinnæ lance-oblong, those on the inferior
side of the lowest pinnæ much elongated ; indusium smooth in
American specimens.— British Flora, ed. i., p. 444. — L i n k , Fil. Hort.
Berol., p. 106. — H o o k e r & A r n o t t , British Flora, ed. vii., p. 586. —
G r /vy, Manual, ed. ii., p. 597.— E a t o n , in Chapman’s Flora, p. 595, and
in Gray’s Manual, ed. v., p. 665.— M i l d e , Fil. Eur. et Atl., p. 136.—
Aspidium dilatatum, S w a r t z , Syn. Fil., p. 420.—W i l l d e n o w , Sp. PL,
v.. 263.—M e t t e n i u s , Fil. Hort. Lips., p. 93; Aspidium, p. 57.— M i l d e ,
in Nov. Act. Acad. Nat. Cur., xxvi., ii., p. 527.—Polystichum spinu-
losmn, var. dilatatum, K o c h , Syn. FL Germ, et Helv., ed. ii., p. 975:
ed. iii., p. 734.—Nephrodium spinulosum var. dilatatum. H o o k e r , Brit.
Ferns, t. 19; Sp. Fil., iv., p. 127.— H o o k e r & B . \ k e r , Syn. Fil., p.
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