462 ANNALS OF THE ROYAL BOTANIC GARDEN, CALCUTTA. (C. Hollrungti 
thinly and  fugaciously  rusty-furfuraceous,  tubular-infundibuliform,. rather loosely 
sheathing, gradually smaller from the base towards the summit of the axis, horizon- 
tally truncate, entire and naked at the mouth, very shortly apiculate at one side, 
unarmed ; spikelets arched, their axis cylindraceous, narrow, rigid, subulate, horizontally 
inserted a little above the mouth of their own spathe with a more or less distinct 
axillary callus; the larger ones, the lowest, 8-9 cm. long, with 20-25 flowers on 
each side; the uppermost about one-half shorter; spathels shortly  infundibuliform, 
truncate and entire at the mouth, slightly apiculate at one side, more or less 
distinctly two-keeled on the side of the insertion of their respective flowers ; 
involucrophorum suborbicular-discoid, very shortly stalked or with a short neck 
or even subsessile, laterally inserted outside its own spathel at the base of the one 
above; involucre discoid, orbiculsr, almost explanate ; areola of the neuter flower 
very depressed, linear, Female flowers very small, ubout 3 mm. long, 
horizontally . inserted. Fruiting perianth distinctly pedicelliform ; the calyx de- 
pressedly ventricose, flat at the base, its teeth broadly triangular; the 
segments of the corolla as long as the calyx and almost as broad as its teeth. Fruit 
(not quite mature) very small, almost sphaeric, 5 mm. in diam., very indistinctly 
apiculate; the very small stigmas sessile; scales very small in 15 series, shining, dirty- 
straw-coloured, very faintly channelled along the middle, slightly prolonged into 
a not very adpressed and often darker point, margin erosely toothed. Seed not seen 
quite mature. 
HanarrAr.— The Aru Island at Jabu-lengan, collected by me in May 1873. 
OssrnvaTIONS.—hRelated to C. pisicarpus and C. Hollrungii, distinct by its quite 
unarmed leaf-sheaths; the large epetiolate leaves; the rachis clawed beneath, other- 
wise totally smooth above from its. insertion; the broadly lanceolate equidistant 
leaflets which have 5 primary acute costae and many distinct secondary nerves, all 
naked on both surfaces; the spikelets with numerous horizontally inserted flowers; 
the involucrophorum shortly stalked; the fruit small pisiform. 
PrarEe 209.—Calamus aruensis Bece. Basal portion of a leaf with its leaf-sheath; 
upper part of a spadix with young fruit.—From the type-specimen in Herb. Becc. 
180. Carawus Hottruxen Becc. in Schum. and Hollr. Die Flora von Kaiser 
Wilhelmsland, 17; Schum. and Laut. Fl. deutschen Sehutzg. in der 
Südsee, 203 (partly)?; Becc. in Ree. Bot. Surv. Ind. ii, 212. 
Description.—Scandent and apparently rather robust. Leaf-sheaths . . . . . Leaves 
large (not seen entire); petiole . . , . . (probably very short); rachis very robust, flat 
and smooth beneath in its first portion where densely armed above with straight, 
erect 4-6 mm. long prickles; the portion above the middle also flat beneath where 
closely armed at the sides with small recurved prickles and smooth along the middle; 
the upper surface gradually becoming more distinctly bifaced towards the summit, 
spinulous on the salient angle; leaflets not very numerous, subequidistant, usually 
alternate, 6-10 cm. apart, very firmly papyraceous, greenish-yellow when dry, 
slightly paler beneath, broadly lanceolate, usually broadest below the middle, 
more graduaily acuminate towards the summit than at the base, where acute, 
