ON LINDSZA LINEARIS. 295 
ON LINDSZA LINEARIS, Sw. : WITH DESCRIPTIONS 
F TWO NEW SPECIES. 
By CHARLES PRENTICE. 
As some confusion exists as to the differentiation of three small 
species of Lindsea, which, though undoubtedly distinct, have not 
en discriminated in any printed memoir, and are confounded 
together under the old and well-known species, Lindsea linearis, Sw., 
by more than one English pteridologist, I send the accompanying 
diagnosis (with illustrative specimens), which I hope may contribute 
to define these species satisfactorily. LZ. linearis, Sw., is so generally 
known, and so well described by Swartz, and by Sir W.J. Hooker in 
) 
more circumscribeil, if not confined to the latter colony. 
L. rnctsa, n.sp.—Rhizome creeping, but more slender than that 
of the older species; stipites slender, pale green, smooth, 
from three or four inches to a foot high; pinne numerous, 
deeply incised, flabellate, the larger often three-lobed, bearing short 
interrupted sori on each division, the pinnz smaller above and below 
than in the middle of the frond, Matures in June, as does L 
being much less robust in every part. : 
. HETEROPHYLLA, 17.sp.—Stipites tufted, sending down a 
cluster of rather slender radicles, and with no tendency 
to develo a rhizome; lower fronds uniformly shorter, 
bearing deeply-lobed flabellate pinne, which are often but 
divisions of the pinne. ‘These fronds form a rosette, from which 
only with pale purple. Matures 1n July, a month later than either 
L. linearis or ZL. incisa, and generall found in drier and more 
exposed localities, though I have seen the three growing near each 
other, often in i ri. 
pinve, in the colour, and in being later in developing. 
