C. tenuis.} BECCARL MONOGRAPH OF THE GENUS CALAMUS. 263 
secondary nerve stronger than the others; the three nerves furnished above with 
remote rather long spadiceous bristles; the other secondary nerves smooth, one of these 
generaly running in close proximity to or along the margins; on the lower surface 
the mid-costa very slightly prominent and sparingly spinulous; margins rather closely 
and not very appressedly spinulous; transverse veinlets not very crowded, rather 
sharp and short; in some leaflets the mid-costa frequently furnished near the base 
on its upper surface with a small rigid spinule; the largest leaflets, the lower ones, 
20-35 cm. in length, in smaller specimens 15-18 cm. only, and 15 mm. broad, the 
upper ones gradually decreasing in size; the two of the terminal pair quite free at 
the base. Male spadiz very long (1°5 m. and sometimes more), ultradecompound, with 
rather many partial inflorescences; these 15-20 cm. apart; lowest primary spathe 
tubular, elongate, somewhat flattened, acutely two-edged, aculeolate, truncate at the 
mouth; upper primary spathes tubular-elongate, cylindraceous, somewhat enlarged and 
rather loosely sheathing in their upper part, where more or less prickly, much 
attenuated at the base, where flat on the inner side, convex and sparingly clawed on 
the back, prolonged at the summit into an acute and ultimately decayed point, keeled 
on the back; partial inflorescences with a slender filiform axis, the largest, the lower 
ones, 15-20 cm, long, rather dense, panicled, subpyramidate, with some simple 
spikelets in their upper part and a few branchlets lower down, the branchlets 
spreading and arched; the largest of these, the lower ones, 8-10 cm. long with 
8-10 spikelets on each side and a terminal spikelet longer than the side ones; the 
upper branchlets gradually smaller; secondary spathes narrowly  tubular-infundibuli- 
form, more or less obliquely truncate at the mouth and prolonged at one side into 
a triangular acute distinctly striately veined point, fugaciously  scaly-furfuraceous; 
tertiary spathes or spathes of the branchlets gradually becoming smaller towards the 
extremity of these, tubular with a suddenly enlarged small limb; spikelets attached 
a few millimeters above the mouth of their respective spathe with a distinct axillary 
callus, the largest, the lower ones, 2-3 cm. long with 6-10 distichous flowers on 
each side, rapidly decreasing in length and number of flowers from the base of the 
inflorescence upwards, those of the summit very short and with very 
few flowers; the axis of the spikelets very slender, filiform, sinuous; spathels 
very narrowly tubular and angular at the base, suddenly widened into a 
small broadly infundibuliform or sometimes bracteiform, strongly striately veined 
acute limb; involucre usually almost exsert from its own spathe, and obliquely 
attached to the base of the spathel above its own, concave, rather shallow, 
‘bidentate on the side next to the axis. Male flowers distichous, appressed to every 
flexure of the axis (like the male flowers of a Pinanga) completely exsert from 
the involucres, inserted at an angle of 45°, 4 mm. long, 1 mm, thick, oblong, very 
obsoletely trigonous, acute or apiculate ; calyx subcampanulate, striately veined, divided 
down not quite to the middle iato 3 broad acute lobes; corolla nearly twice as long 
as the calyx, tubular at the base, divided down to about the middle into three 
ovate-lanceolate acute segments; stamens with subulate filaments; these inflected at 
the apex in the bud, adnate by their bases to the tubular portion of the corolla ; 
anthers versatile, lanceolate-sagittate, acute at the apex, rounded at the base; rudi 
menfary ovary very small, not reaching to the middle of the undivided portion of 
the corolla, Female $padiz like the male, but simply decompound; partial inflorescences 
ascendent from iride the mouth of their own spathe, then arched and spreading; 
