326 ANNALS OF THE ROYAL BOTANIC GARDEN, CALCUTTA. [¢e. marginatus. 
106. CALAMUS MARGINATUS Mart. Hist. Nat. Palm. iii, 342; Walp. Ann. iii, 491, 
and v, 832; Miq. Anal. Bot. Ind. 6 and Fl. Ind. Bat. iii, 
138 and De Palmis Arch. Ind. 29. H. Wendl. in Kerch. Les 
Palm. 237; Becc. in Rec. Bot. Surv, Ind. ii, 208. 
Daemonorops? marginatus Bl. Rumphia iii, 24. 
DESCRIPTION.—Scandent. Sheathed stem 20-25 mm. in diam.  Leaf-sheaths flagellifer- 
ous short thick and almost woody, gibbous above under the petiole, very obliquely 
truncate and open a long way down on the ventral side at the mouth, where 
naked at the margins, the surface armed with horizontal or slightly deflexed, rather 
strong solitary or confluent or even transversely seriate spines, which leave a deep 
depression above them and are of various sizes, the largest being 2:5 em. long, 
greenish-brown, paler at the apex thun at the base, where flat beneath and slightly 
gibbous above.  Leaf-sheath flagella very long (in one specimen 2:5 m.), very slender, 
flattened, two-edged and naked in their lowest portion, armed upwards with rather 
regularly set half-whorls of moderately strong  black-tipped claws. Leaves not 
cirriferous, in one specimen 1:2 m, in length, including the petiole; this 25 cm. 
long, narrowly channelled above, very convex and smooth beneath along the middle 
but armed at the sides with variable (from a few mm. to 3 cm. in length) 
broad-based horizontal rigid spines; rachis in its lower surface round at first, and almost 
flat upwards where armed with black-tipped slightly hooked claws, these 12-20 
mm, apart one from the other, with an acute salient angle above, where smooth 
and not spinulous and with the side-faces rather concave; leaflets very numerous, 
equidistant, very regularly set, inserted at an angle of 45,° 15—18 mm. apart, alternate 
or subopposite, green, almost shining above, barely paler beneath, thinly papyraceous, 
rigidulous, linear-lanceolate or linear-ensiform, narrowed to the base and a good 
deal more gradually acaminate at the summit into a very slender and acute 
bristly-penicillate tip, furnished above with 3 rather distinct and smooth (not 
bristly or spinulous) costae of which the mesial is the strongest; beneath, the costae 
more slender than above and very densely covered with small fulvous spinules; 
the entire surface minutely longitudinally striate by very fine veinlets; the margins 
quite naked but distinctly thickened by a rather strong nerve and in their lower 
surface very finely scabrid or shagreened when seen under a lens; transverse veinlets 
especially visible on the upper surface; the largest leaflets, those of the lower 
third part of the rachis, 25-26 cm. long sud 13-15 mm. broad, the lower 
ones a good deal narrower, those near the summit shorter and less acuminate; the 
two of the terminal pair very small, free at the base.—Other parts unknown. 
Hasrrat.—South Borneo near Martapora on the River Dusson, Blume; N. W. 
Borneo in Sarawak near Kuching, Beccari P. B. No. 1906. 
OzseRvaTions.—The above description is taken from the specimen collected by me 
in Sarawak, but the species was established by Blume on a single leaf of which I 
have seen a portion and which perfectly agrees with the corresponding portion of my 
specimen; only the leaflets in Blume’s specimen are a little T" (40-43 cm. in. 
length and 2 cm. wide) but otherwise identical. 
