10 ANNALS OF THE ROYAL BOTANIO GARDEN, CALCUTTA. [@. divaricatus. 
To €. zonatus apparently belongs also a specimen of the Buitenzorg Herbarium 
(No. 16709), from Dutch W. Borneo, (collected, I think, by Teijsmann in the Resi- 
dency of Pontianak) which differs from Halliers No. 2020 in being more robust (the 
sheathed stem is 11 mm. in diameter) and in having the spadix, although slender, 
- yet more rigid and with the primary and secondary spathes conspicuously scabrid all 
over; the leaflets are also more distinetly glossy on both surfaces; all nerves are 
smooth, 
28. CALAMUS RADULOSUs Becc, Add :—Ridley, Mat. Fl. Mal. Penins. ii, 198. 
20  CazaMus RUGosUs Becc. Add:—Ridley, Mat. Fl. Mal. Penins. ii, 198. 
29a. CALAMUS DIVARICATUS Becc. n. sp. x 
Desceiption.—Scandent, very slender. Sheathed stem 7 mm. in diameter. Leaf- 
sheaths slightly gibbous above, very obliquely truncate at the mouth, in youth 
tigrine or alternately marked with transverse, irregular, whitish pulverulent and 
dark stripes, in the adult leaves distinctly striate longitudinally, armed with not 
many very small, scattered, triangular subbulbous horizontal spines, and ornamented 
with approximate, slightly raised, sinuous, interrupted ridyes or wrinkles which are 
finely scabrid-serrulate on their crests. Ocrea short, membranous, deciduous. Leaves 
delicate, the only one seen by me 70 cm, long, including the petiolar part; the 
latter 12 cm. long, 3 mm. broad, flat on the upper and strongly convex on the 
lower surface, armed with a few, small, scattered claws, the edges acute; rachis 
trigonous, irregularly clawed on the lower surface, the salient angle of the upper 
surface very sharp. leaflets few, 12-13 on each side; the upper divaricate- 
horizontal, opposite in pairs, the pairs remote (usually 4 cm. apart); on the lower 
part of the rachis, they are more irregularly set, also distant and more or less 
deflexed, thinly papyraceous, slightly paler on the lower than on the upper surface, 
and smooth on both; they are very narrowly lanceolate, have the base acute and are 
 long-acuminate to a very fine bristly tip, subtricostulate, the side coste very slender; 
transverse veinlets sharp on both surfaces; margins minutely, appressedly and 
remotely spinulous; the intermediate leaflets are 20 em, long, 13-14 mm. broad, the 
upper are smaller, the two of the apex are the smallest and 7 cm. long, 5-8 mm. 
broad, quite free at the base and with a short rigid bristle between them. Male 
spadiz .... Female spadiz flagelliform, slender but rigid and erect in its lowest portion; 
it bears only one partial inflorescence, and terminates in a long, very slender, very 
finely and irregularly clawed flagellum; the lowest part of the spadix is strictly 
sheathed by only one spathe which is 30-35 cm. long, slender, flattened, acutely 
two-edged, 3 mm. broad, minutely prickly and papillose-scabrid and prickly on the 
edges in its lower part; above split longitudinally open, flat, linear, unarmed and 
striate externally ; the solitary partial inflorescence forms an erect, rigid panicle, 
elongate-triangular in outline, about 10 em. long, and carries distichally 8-9 speedily 
decreasing spikelets on each side; secondary spathes strictly sheathing, densely hairy- 
scabrid, truncate at the mouth, produced above into a triangular membranous point ; 
spikelets spreading, arched, inserted at the mouth of their respective spathels; the 
 lower-spikelets are 2-2°5 em. long, have 9-10 female-flowers on each side and as 
many neuter flowers which are about as large as the female so that the spikelets 
appear to have 4 distinct series of flowers. The upper spikelets speedily decrease in 
