6. Helferianus.] BECCARL MONOGRAPH OF THE GENUS CALAMUS. 247 
horizontal, distichous, remote -(3-4 mm, apart) flowers on each side ; ; spathels subcylin- 
draceous-infundibuliform, slightly enlarged above, distinctly apiculate on one side, 
strongly .striately veined in their upper part, smooth at the base; involucre laterally 
adnate to the base (in the smooth portion) of the spathel above its own, shallowly 
cupular, strongly veined at the sides, posticously bidentate and callous at the axilla 
next to the axis. Male flowers glabrous, subcylindraceous, rounded but apiculate at the 
top, 3 mm. long, 1 mm. thick; the calyx strongly striately veined, subventricose or 
urceolate, callous at the base, its teeth very short, broad, acute, 3-5-veined; the 
corolla two and a half times as long as the calyx, narrower than this, oblong.clavate, 
polished outside, divided down almost to the base into 3 narrow, acute segments; 
filaments of the stamens united by their bases, subulate, with inflected apices when in 
the bud; anthers sagittate, acute; rudimentary ovary distinctly evolute, conical, striate. 
channelled by the pressure of the stamens and crowned by three subulate stigmas. 
Female spadix similar to the male but simply decompound; spikelets bearing on each . 
side 10-12 horizontal flowers, these 3-4 mm. apart; spathels as in the male spikelets; 
involucrophorum laterally adnate and almost hollowed into the base of the spathel above 
its own, with a very short limb and a vestige of a transverse rima in the axilla 
next to the axis; involucre rather shallow, moulded on the involucrophorum and hardly 
distinguishable from this, with entire or faintly lobulate undulate margin; areola of the 
neuter flower flattish, callous, transversely ellipsoid or nearly round with sharply defined 
borders. Fruit globose, somewhat longer than broad, 8-10 mm. in diam.; scales in 
15 series, of a pale-straw colour, shining, with an elegant and narrow chestnut- 
brown intramarginal line, their apex somewhat prolonged, obtuse, and rather coarsely 
erosely toothed. Seed, when perfectly ripe and divested of its thin integument, stony, 
shining and brown-ochraceous, 8 mm. long, 6 mm. thick, rounded at the summit, 
flattish at the base, convex and irregularly facetted on the back (the facets slightly 
concave), flattish on the raphal side with a small circular and deep chalazal fovea 
from whence irradiate a few short irregular furrows; albumen equable; embryo 
basal.—The young parts and chiefly the leaf-sheaths and the leaf-rachis are more or 
less tawny-furfuraceous. 
Hasrrar.— Ceylon: Hinidoon Pattoo, in the district of Galle, Thwaites C, P. . 
No, 3159. | 
OBSERVATIONS,—À. very slender and delicate species, distinct in the group by 
the following characters: leaflets numerous, linear-ensiform, equidistant, unicostate, 
the costa and one slender nerve on each side of it bristly-spinulous above, beneath — 
only the costa furnished with a few long bristles; spadices and spathes excessively 
slender; male and female flowers horizontal, 3-4 mm. apart; fruit small, globose; 
seed facetted. 
PLATE 82.—Calamus delicatulus 77». Leaf-sheath bearing a male ropes and the 
base of a leaf; summit of a leaf (undersurface); and from Thwaites C. P. No. 3159 
in St. Petersb. Herb. 
67. CaLAMUs HzLrERIANUS Kurz in Journ. As, Soc. Beng. xliii, 2 (1874), 
219, and For. Fl. Brit. Burma ii, 6521; Hook. # Fl. Brit. 
Ind, vi, 446; Becc, in Rec. Bot. Surv. Ind, ii, 206. 
