76 ANNALS OF THE ROYAL BOTANIC GARDEN, CALCUTTA. [D. Treubianus. 
closely obliquely inserted. Leaves very long and comparatively delicate, 1'8 m. long 
in the pinniferous part and terminating in a not very long, slender and not very 
regularly clawed cirrus; the petiole has a very clean, almost polished, surface and is 
35 em. long, 12 mm. broad, plano-convex, smooth on the upper surface, with very 
sharp margins, armed exactly on the edges with small, very sharp, ascendent prickles, 
and beneath those with a few straight, robust, horizontal, 15-29 mm. long spines ; 
the lower surface is sparsely prickly near the base and armed with a few long 
straight spines along the centre; the rachis on the upper surface is flat in its first 
portion and very narrowly channelled on each side, where are inserted the leaflets, 
higher up is convex and from the middle, in the upper surface, the convexity is 
transformed into a salient angle, which is very acute only near the apex, and is more 
or less spinulous throughout; on the lower surface the rachis is rather closely armed 
immediately from its base with ternate, very sharp claws, which become 5-nate 
higher up. Leaflets numerous, equidistant, not very closely set, 2-2:5 cm. apart, 
green and dull on both surfaces, thinly papyraceous, linear, very narrow, 25-30 cm, 
long, 1 cm. wide, broadest a little above the base and thence very gradually acumi- 
nate to an extremely fine filiform tip; the mid-costa and one rather distinct nerve on 
each side of it furnished with rather long bristles on the upper surface; on the 
lower the mid-costa alone closely bristly spinulous; the margins minutely closely and 
appressedly spinulous. Male spadiz erect, exactly fusiform, very gradually narrowing 
above into a long beak and also gradually tapering into a very slender base which 
is supported by a pedicellar part, the pedicel being 15-20 mm. long, 6-7 mm. broad, 
not or slightly prickly, flattened and acutely two-edged; the entire length of the 
unopened spadix is 40-55 cm., while the flowering panicle is 20-28 cm., with 5-6 
partial inflorescences; outer spathe very narrowly cymbiform, acutely two-keeled, 
sparingly armed with scattered, very narrowly acicular or subfiliform, flexible, 2-4 cm. 
long spines, those at the base of the beak being the longest; the beak itself about 
as long as the body; the other spathes are all unarmed; the axial parts of the spadix 
almost glabrous even before the opening of the spathes; the internode between the 
frst and the second spathes (forming an additional peduneular part to the flowering 
axis) is slender, 2-3 cm. in length, 4 mm, in width, flattened with acute edges; 
partial inflorescences 6-7 cm. long, composed of about ten branchlets, each of them 
carrying 3-4 spikelets on each side; the lowest ‘of these, the largest, 10-12 mm. long 
with 3-4 flowers on each side, their axis slightly zig-zag sinuous, with very short and 
“almost glabrous spaces between the flowers; spathes bracteiform, amplectent, produced 
externally into a broadly triangular limb, of which the rather obtuse point does not 
exceed the involucre; the latter cupular, truncate; obsoletely 2-dentate on the 
posticous side, with a small but distinct callus at its axilla, Male flowers 5 mm. long, 
oblong, obsoletely 3-gonous, very slightly narrowing towards an obtuse apex; the 
calyx cupular-campanulate, very superficially 3-toothed; the corolia almost three times 
as long asthe calyx. Female spadiz . . . Bruit. : 
HanrraAm.—1 have received this species from the Botanic Garden of Buitenzorg, 
where it is cultivated with the label '* Daemonorops Schwenck " without any special 
reference to its native country. The species is gratefully dedicated to the late Dr. 
Melchior Treub, who had so largely contributed to my studies, supplying me with 
splendid specimens of the species cultivated in the garden under his direction. 
