54 ANNALS OF THE ROYAL BOTANIC GARDEN, CALCUTTA. P. wrayi. 
I scarcely doubt that to the same variety of Plectocomiopsis is to be reduced 
Calamus triqueter Bece. (P. B. No. 2079). The specimen upon which this species 
was established is very similar to those described abova ; its rather. sharply trigonous 
Sheathed stem has the 3 sides or faces smooth, slightly convex, 15—18 mm. wide, 
and the angles prickly; the leaflets have a secondary nerve on each side of the 
mid-eosta more distinct than the other nerves, so as to render these leaflets 
almost 3-costulate. 
Prate 33.—Plectocomiopsis geminiflorus var. borneensis Bece.—An entire female 
partial inflorescence with nearly fully developed flowers. Intermediate portion of a 
leaf. From Winkler No. 2401. 
PLate 34.—Plectocomiopsis geminiflorus var. borneensis Becc.—The entire speci- 
men P. B. No. 2079, the type of Calamus triqueter Becc. in Herb. Becc. 
2. PLEcrocomiorsis Wrayir Becc. in Hook. f. Fl. Brit. Ind. vi, 480. 
. PI. geminiflorus (non Griff.) Ridley, Mat. Fl. Mal. Penins. ii, 214 (partly). 
Description.—Rather slender. and very highly scandent. Sheathed stem of the 
flowering end 18—22 mm. in. diameter, obsoletely 3-gonous. Leaf-sheaths not gibbous 
above, passing very suddenly into the petiole, exactly truneate horizontally at the 
mouth, of a light colour, very slightly scurfy at first, later glabrescent, sparingly 
armed with very short, conical, sharp, scattered, pale prickles, or almost smooth ; 
no trace of ocrea or ligula. Leaves of the flowering end provided with a petiolar 
part 8—14 em. long, 8—10 mm. wide, flattish and slightly furrowed along the centre 
above. underneath convex and armed along the centre with distant spines, the 
margins acute and armed with similar distant short, broad-based spines; the rhachis 
is thinly and fugaciously rusty furfuraceous below, and armed there with distant, 
at first single, and upwards geminate and then ternate claws; it is concave along 
the centre in its lower portion, and above upward it has a salient smooth acute 
angle, and is trigonous in transverse section; the cirrus is elongate and armed at 
regular intervals with half whorls of claws. The pinniferous part, in leaves of the 
flowering end, is 0°70 .em.—1. m. long, is shorter in the uppermost leaves and in 
the lower. ones almost certainly is longer. Leaflets rather numerous, equidistant, 
papyraceous, very narrowly lanceolate, largest about their middle, and thence gradually 
and almost equally narrowing towards both ends, very gradually long-acuminate 
from about the middle to a very fine capillary smooth or very slightly spinulous 
tip; the base acute and more or less callous at its axilla; both surfaces green, the 
lower slightly paler and duller than the upper and under a strong lens, very 
minutely, though not very distinctly dotted; the mid-costa is slender, usually 
slightly bristly towards the end on the upper surface; secondary nerves 5—6 on 
each side of the mid-costa, but frequently hardly distinguishable from the tertiary 
ones, rather strong and numerous; transverse veinlets short, very sharp on the 
upper surface; margins not or only very slightly thickened and quite smooth; the 
intermediate leaflets are the largest, 30—35 cm. long and 2 cm. wide, those of 
both ends gradually smaller; the leaves belonging to the uppermost branches of the 
inflorescence are gradually reduced to the sheaths only, and to the rhachises bearing 
