56 ANNALS OF THE ROYAL BOTANIC GARDEN, CALCUTTA. [0. scabrifolius. 
110. CALAMUS PILOSELLUS Becc, 
OBSERVATIONs.—] have seen of this species the upper part of the stem with an 
entire leaf, preserved in the Herbarium at Buitenzorg (No. 16718, collected in Borneo, 
almost certainly by Teijsmann, in the Residency of Sambas or of Pontianak. Malayan 
name “Rotan Boloh.” The leaf-sheath is smooth, minutely punctulate when seen 
under the lens; the leaf is 65 cm. long; the leaflets are more numerous (about 45 
pairs) and slightly smaller than in the type specimen, 8-10 mm. apart on each side, 
8-10 cm. long, 8 mm. broad, otherwise the leaves with the petiole and rachis are 
exactly as already described. 
110a. CALAMUS SCABRIFOLIUS Becc. n. sp. 
Description.—Scandent, slender, Sheathed stem about as thick as a man's little 
finger Leaf-sheaths strongly gibbous above, in the small portions seen by me 
unarmed, dull, not scabrid to the touch. Ocrea very short, obliquely truncate, 
glabrous. Leaves non-cirriferous, 6-90 cm. long including the petiole ; the latter 14-15 
em. long, glabrous and almost polished, rounded and smooth underneath, deeply and 
broadly channelled on the upper surface, the edges cute, armed with a few small 
claws; rachis armed underneath along the centre with 4 line of solitary, very 
sharp claws, which become closer and smaller towards the summit; on the upper 
surface it is bifaced and has the salient angle covered with soft rusty hairs. 
Leaflets numerous, equidistant, about 15 mm, apart, very regularly inserted at an 
angle of about 45°, alternate or almost opposite, elongate, very narrow, almost 
equally tapering towards both ends, very finely acuminate at the apex, thinly 
papyraceous, rather firm, green and subconcolorous on both surfaces ; the upper surface 
has 3, and often 5 sharp costae and several unequal secondary slender nerves; the 
costae are ciliate and the secondary nerves are very closely covered with innumerable 
short bulbous hairs (visible to the naked eye) which render that surface very scabrid ; 
the under surface has the nerves more slender and less prominent than the upper, but 
it is also very closely covered with bulbous hairs, a little finer however than those 
of the other surface; the margins are inconspicuously and shortly ciliate; transverse 
veinlets indistinct; the mesial leaflets are 20-26 em. long and 12-14 mm, 
broad at their middle; the lowest are somewhat shorter and: narrower; those near 
the summit suddenly smaller; the two of the terminal pair are the smallest, free 
at their base. Male spadiz more than a metre in length, terminating in a slender 
aculeolate flagellum; it has 2-3 partial inflorescences, twice branched in their lower 
part; the spathes are glabrous and not in the least degree scabrid and are exactly 
like those of the female spadix; spikelets arched, slender, the largest about 3 em. 
long, with 2 series of 6-7 flowers each; spathels infundibuliform, loosely sheathing ; 
involucre shallowly cupular, inserted outside its own spathel, also shallowly cupular, 
slightly apiculate at one side and frequently shortly auriculiform, Male flowers slender, 
subtrigonous, 4-5 mm. long, 1 mm, in diameter, subacute; the calyx campanulate 
broadly 3-toothed; the corolla two and a half times as long as the calyx, 
Female spadiz simply decompound, 1-l:2 m. long, inclusive of the terminal, 
59 cm. long, filiform flagellum, rigid and erect in its lowest part, glabrous and 
not scabrid, and with only 3-4 partial, strongly scorpioid inflorescences; primary 
spathes elongate, tubular, closely sheathing, produced at the summit into a 
