C. didymocarpus] BECCARI.  MONOGBAPH OF THE GENUS CALAMUS. 467 
bordered areola for the neuter flower. Besides C. pachystachys and C. didymocarpus, 
another species from New Guinea, very imperfectly known (0. fertilis Bece.), has 
geminate female flowers at each spathel, but in this the seed is not ruminated, 
and evidently it belongs to a different group from the two mentioned above, which 
apparently are akin to @. Vidalianus. In this also I have found sometimes two 
female flowers, but I have not seen the two exactly equally evolute. 
Of C. pachystachys I have seen a partial inflorescence with almost ripe fruit, 
and an almost entire leaf, 80 cm, long in the pinniferous portion, with the rachis 
8 mm. thick at its base. 
PrarE 212.—Calamus pachystachys Warb. Upper portion of a leaf and its terminal 
cirriferous summit ; partial inflorescences of a spadix with almost mature fruit.—From 
Warburg’s type-specimen in Herb. Berol, 
188. CALAMUS DIDYMOCARPUS Warb. (name only in Herb. Berol.) 
Description.—-Scandent, robust. Stem .-. ...  Leafsheaths .. ... Leaves 
large (only the summit of one seen by me) terminating in a robust cirrus, which is 
2 metres in length and fearfully armed with rather approximate  half-whorls 
of very acuminate and robust black-tipped claws; these often intermingled with 
others solitary or more or less aggregate and irregularly set; petiole... . . ; 
rachis in its upper portion bifaced above with acute and smooth angle, rather con 
vex beneath, where strongly armed with half-whorls of claws as on the cirrus ; 
leaflets of the summit of the pinniferous part remotely inserted (8-10 cm. apart) the 
largest of these, the lower ones 43 cm. long, 4 cm. broad, the upper ones narrower 
and shorter, papyraceous, firm in texture, somewhat longitudinally plicate, green even 
when dry, glabrous, concolorous and shining on both surfaces, lanceolate-ensiform, 
almost equally narrowed towards both ends, more or less callous in the axilla at 
their insertion, gradually acuminate from the middle upwards into a not very ‘cute 
and at the sides bristly-spinulous tip; the mid-costa rather acute and prominent 
. above where sparingly bristly-spinulous, superficial and naked beneath; secondary 
nerves numerous, slender but rather distinct and naked on both surface; transverse 
veinlets very fine, sinuous and close together; margins slightly thickened by a nerve 
and ciliate mainly near the summit with short rather spreading and rather approxi- 
mate spinules. Male spadiz ....- Female spadiz, judging. from the portion seen by 
me, large and diffuse; primary spathes . . . . .; a partial inflorescence (the only one 
seen by me) about 1 metre in length, comparatively l slender, with 6-7 spikelets on 
each side, secondary spathes tubular, slightly infundibuliform, 6-7 cm. long, closely 
sheathing, armed chiefly on the outer side near the base with numerous, small, broad- 
based, black-tipped claws and covered with very numerous and confluent rusty scales, 
narrowed a good deal towards the base into an axial portion, which is convex on 
the outer and flat on the inner side, entire, truncate and naked at the mouth, 
prolonged at one side into a short triangular acute point, sometimes with a smaller 
but similar point on the other side and therefore subbilabiate; spikelets inserted above 
the mouth of their respective spathe with a rather distinct axillary callus, elongate, 
vermicular, flexuose, the lower ones the largest, even 25 cm. long, with 18 female 
Ann. Roy. Bor. Garp, CarcurrA Vor, XI. 
