D zeylanicus } BECCARI, MONOGRAPH OF THE GENUS CALAMUS. 379 
somewhat narrowed at the base where smooth, but otherwise densely covered, chiefly 
on the outside and near the summit, with very small recurved prickles, these resting 
on a tuberculiform base and prolonged at one side into an erect broad exsuccous 
and ultimately decayed point; spikelets vermicular, thick, inserted inside the mouth of 
their own spathe, conspicuously arched downwards, all about of the same dimensions, 
7-11 cm. long with numerous very closely packed distinctly 4-farious flowers, as the 
neuter flowers are very similar to and as large as the fertile ones; spathels very 
short, very approximate, partially enclosed one inside the other, very broadly infundi- 
buliform without a tubular portion, truncate, entire and ciliolate at the margin, not of 
obscurely apiculate at one side, rusty-furfuraceous, finely striately veined; involu- 
crophorum cupular, almost enclosed in its own spathel; the involucre as long, cupular, 
rather deep, with an entire margin; areola of the neuter flower lunate; sharply 
bordered, large and deep, slightly smaller than the involucre. Female flowers ovoid, 
about 4 mm. long; the calyx shortly 3-dentate, scaly-furfuraceous; the corolla slightly 
longer than the calyx; staminal urceolum crowned by’ very short filaments, anthers 
sagittate, small. Neuter flowers barely differing externally from the fertile ones; only 
the corolla is somewhat longer than the calyx; stamens with the filaments connate at 
the base, subulate, rather thick in the free part; anthers rather large, sagittate 
(apparently sterile); abortive ovary formed by 3 elongate bodies about as long as 
the anthers. 
. Hasrrar.—Singapore, in the wild part of the Botanic Garden, Ridley No. 3504 
and No. 6901. 
OxssERVATIONS.—This species has considerable affinity with C. densiflorus, but the fruit 
not being known its position remains doubtful. The chief distinctions are the 
shining leaflets with smooth margins and with 3 costae, smooth above and bristly 
beneath, the very long rigid partial inflorescences with many thick arched spikelets; the 
flowers in'the female spadix distinctly 4-seriate, viz. with 2 series of female flowers 
and two of neuters; these last very similiar to the fertile ones. Mr. H. N, Ridley 
writes to me (August 1902) that of this species there are two plants in the Garden 
Jungle at Singapore—one male, the other female, but they never have produced 
fruit; the supposed male plant, however, is probably that of O. densiflorus, sop riins 
to Ridley's specimen in the Herb. at Kew. 
PrArE 158.—Calamus Ridleyanus Bece. The upper part of a leaf; the terminal 
portion of the spadix with two partial inflorescences from Ridley's No. 3504 in Herb. 
Becc. 
135. QCALAMUS ZEYLANICUS Becc. in Hook. fil Fl, Brit. Ind. vi, 455, and in 
Rec. Bot. Surv. Ind. ii, 210. 
C. rudentum Dr of Lour) Thw. Enum. Pl. Zeyl. 330 (excl. all syn. 
and CO. P. exsicc. No. 2874 (see Hance in Journ. of Bot, 1874, 
262). 
Descriprion.—Apparently very high scandent, large and robust. ^ Leaf-sheath: 
: . . Leaves of the adult plant very "mn very probably cirriferous, but 
not seen entire by me; petiole a aa is (from a portion above 
Ann. Roy. Bor. Garp. Carcurra Vor. XI. 
