SUPPLEMENT TO THE SPECIES 
OF 
CALAMUS. 
4, CALAMUS DONGNAIENSIS Pierre. Add:—Becc. in Webbia di U. Martelli, iii, 
241, and in Bull. Mus. Hist. Nat. (1911), 159. 
4a, CALAMUS ACANTHOPHYLLU: Becc, in Webbia di U. Martelli, iii, p. 229, and 
in Bull. Mus. Hist. Nat. (1911, 159. 
DEscRIPTION.— Apparently stemless and bushy, producing shoots about as thick 
as a finger. Leaf-sheaths non-flagelliferous, split and open on the ventral side, 
12-15 em. long, with a thick back and thinly coriaceous edges, finely striate 
longitudinally, fugaciously and sparingly rasty-furfuraceous, more or less armed 
with very slender, straight, horizontal, acicular spines, which arise from a bulbous 
base and are 5-10 mm. long. Ocrea liguliform, rather elongate, at first furfuraceous, 
later glabrous, dry and deciduous. ^ Leaves erect, rigid, 50-80 cm. long on the 
whole, the petiolar part alone 15-30 cm. long, subplano-convex in its lower part, 
subterete and 4-5 mm. in diameter higher up, more or less armed with small, scattered 
straight, light-coloured spines, which are often deflexed, especially on the back; the, 
rachis has on the upper surface the salient angle acute and frequently more or less 
prickly, while on the lower is armed irregularly, with solitary, scattered, more or less 
hooked prickles; leaflets not numerous, 12-14 on each side, inequidistant, at times 
conspicuously yet not distinctly grouped, except a few (5-8) at the upper end, 
which are very approximate and radiate-digitate—the two of the terminal pair 
being connate to about the middle or somewhat less—, thickly papyraceous, very 
rigid, dull, almost equally green on both surfaces, linear, very narrow, plicate at 
the base, very minutely dotted, especially on the lower surface, with numerous, 
very small, linear, hair-like scales; the  mesials are 15-25 cm, long, 6-10 
mm. broad, acute or acuminate to a subpungent tip; the upper are shorter, and 
those of the apex only 7-10 em. long, less acuminate and frequently obtuse 
or shortly bidentate; all are more or less distinctly 3-costulate and usually the 
mid-costa alone, but at times two, or also all three, bear some erect, conspicuous, 
rigid, acicular, straight, light-coloured spines, 3-5 mm. long; the margins are armed 
every 5-10 mm. with similar spreading spines; more rarely the spines on the nerves 
and on the margins are scanty and small; transverse veinlets rather numerous and 
sharp. Spadices, male and female, similar, very simple, erect, about as long as 
the leaves, non-flagelliferous; they terminate in an inconspicuous apiculum, spring 
laterally from near the apex of the leaf.sheaths, and have the base connate and 
decurrent along the entire length of the leaf-sheaths on which the origin of the 
spadices is marked by a broad smooth ridge. The spadices (male and female) 
consist of a small panicle, 10-20 em. long, composed of only 4-8 alternate, more or 
less remofe spikelets, borne at the end of a long, rigid, straight, terete or slightly 
| flattened, 3-5 mm, thick, peduneular part, which is very strictly sheathed by several 
Ann. Roy. Bor. Garp. CarcurTA Vor. XI. 
