86 ANNALS OF THE ROYAL BOTANIC GARDEN, CALCUTTA. (D. monticolus. 
leaflets and terminating in a slender, not very long cirrus; petiole rather 
elongate, 10-25 cm, long. slightly arched, plano-convex, more or less armed on 
the margins and along the centre of the dorsum at the base with shortish, weak, 
straight or slightly hooked spines, which higher up and on the rachis are transformed 
into solitary claws, becoming ternate in the terminal part and finally 5-nate on 
e cirrus; the pinniferous part 30-50 cm. long; leaflets not many (15-20 on 
each side), slightly inequidistant, l*5-3m., apart, narrowly linear-lanceolate, broadest 
at or a little below the middle and thence gradually narrowing below to a rather 
acute base and upwards to an acuminate and bristly tip, thinly papyraceous, with 
the mid-costa acute and one slender nerve on each side of it bristly above ; 
beneath, the mid-costa alone more or less bristly throughout ; transverse veinlets rather 
sharp; margins closely bristly-spinulous especially towards the apex; the largest 
leaflets, those a little above the base, 15—18 em. long, 6-12 mm. broad. Spadices 
approximate towards the apex of the plant, but not very closely, the sheaths not 
being excessively short. Male spadix before flowering fusiform, gradually narrow- 
ing into a beak about as long as or shorter than the body, erect, more or 
less shortly supported on a rather slender pedicel which is flattened, smooth or slight- 
ly spinuious on the margins, decurrent along the sheath and emerging about the 
middle of its sheath ; outermost  spathe concave-cymibiform, 40-50 em. long in- 
cluding the beak in large specimens, 15-20 em. in very small ones, not very 
acutely two-keeled, armed, usually rather densely, with elongate, very narrowly 
laminar, black, scattered or subseriate spines, which point in different direc- 
_ tions but chiefly downwards, those at the base of the beak being the longest (up 
to 4-5 cm.) often confluent and subseriate; partial inflorescences 5-6 as usual, 
the branchlets 4-5 cm. long and with about ten spikelets; of these the lowest 
12-14 mm. long with 3-4 flowers on each side; the upper ones slightly shorter 
and with fewer flowers; their axis sinuous, slightly scabrid, furfuraceous ; spathels 
bracteiform, triangular, acute at one side ; involucre cupular, sub-cymbiform with 
an acute point on each side, callous at its axilla. Male fürs linear. slender, 6-7 
mm. long, 2 mm. thick, rather acute; the calyx tubular, saperficially 3-dentate; the 
corolla twice as long as the calyx. Female spadiz . . . , 
Hasitat.—The Malayan Peninsula: Pulo Penang at Balik Pulaa (Ridley Nos, 
7900, 7902, 7897 in Herb. Calcutt.). On the Penang Hill, about halfway up (G@rifith), 
and on the same hill found again by Ridley in 1896 (No, 7896 in Herb. Calcutt.— 
a very delicate form). 
According to Ridley (Mat. l. e.) his No. 7900 belongs to D. angustifolius; No. 
7897 to D. calicarpus and No. 7896 really to D. monticolus, 
OssrERvATIONS.—Griffith has described under the name of Calamus monticolus a plant 
from Mount Ophir and another from Pulo Penang; but the two do not seem to me 
exactly alike. Further, three plates in Griffith’s work represent D. monticolus, but 
these also are evidently referable to two different plants, though apparently forms 
of the same species. Plate XXIV-A represents the apex of a non-cirriferous leaf 
but it is difficult to decide to which of the two it belongs. Plate XXIV-B is 
so exactly like MRidley’s Penang specimens Nos. 7900 and 7896 in the Cal- 
cutta Herbarium, that it appears evident that it represents the plant from Ponang 
