Ferns of British India and Ceylon. 235 
oblong, or oblong in outline, pinnae 6-10 inches long, sessile, about 
I inch broad, cut down close to the rachis, glabrous above on the 
segments, or with occasionally a few distant inconspicuous hairs on 
the viens, the rachis strigose, frosted beneath on the veins and 
rachis with minute yellow glandular dots; segments linear, rather 
distant; veins simple (or the lowest one very rarely forked), 12-14 
or even more on each side of the costa ; sori medial, one to each 
vein, much immersed, the depression plainest on the upper side, 
indusium large, persistent, reniform, but appearing orbicular from the 
overlapping at the sinus. Aspidium immersum, Bl. En. FiL 156. 
Nephrodium immersum, Hook. Sp. Fil. 112. Syn. Fil. 263. 
Malacca and the Malay Peninsula. 
(Also in the Philippines and New Caledonia.) 
Mr. Clarke considers that the Assam plant {Bedd. F. B. I. t.. 
252) should be referred to gracilescens, it is of a different texture, less 
cut down, and with much fewer veins. 
10. Lastrea calcarata. {Bl.) Caudex erect, stout, stipes 
tufted, fronds lanceolate pinnate, sometimes with auricles below, up 
to about 2 feet long, pinnae spreading 1-4 inches long by \ inch to 
nearly i inch broad, cut down two-thirds or more towards the rachis 
into obUque falcate linear oblong segments, the upper basal one 
sometimes considerably longer than the others, rachis villous, under 
surface more or less villous, upper surface villous, or glabrous 
except the secondary rachis, vetnlets 3-8 on a side, simple, sori 
medial, involucre glabrous or villous. Asp. calcaratum, Bl. En. 
Fil. Jav. p. 159. Lastrea calcarata. Hook. Sp. Fil. iv. 93, and 
falciloba, 108. 
Var. ciliata, type {IVall. Cat. 351), texture herbaceous, lowest 
pinnules deflexed, no auricles on the stem ; stipes rounded, pinnae 
about 4 inches long, caudate at the apex, nearly i inch broad ; 
indusium hairy or glabrous. Lastrea falciloba, Bedd. B\ S. I. 105. 
Asp. ciliatum. Wall. Cat. 351, and Asp. canum, JVall. Cat 387. 
Nephr. ciliatum, Clarke, F. N. I. 515, except syn. L. Bergiana 
{Bedd), which is L. cana {Baker). 
