394 ANNALS OF THE ROYAL BOTANIC GARDEN, CALCUTTA. (0. Warburgii. 
and arise erect from this and then spreading, the lower ones the largest, about 40 
em, long, with 8-10 spikelets on each side; secondary spathes as in the male spadix; 
spikelets arising erect from their own spathe, to the bottom of which they are 
inserted with a flattened pedicel, 8-10 em. long with 18-20 flowers on each side; 
spathels infundibuliform truncate at the mouth and prolonged at one side into a 
rather long point; involucrophorum calyciform, narrowed at the base and inserted at 
the bottom of its own spathel, acutely bidentate and two-keeled on the side next to 
the axis; involucrum unilaterally evolute, deep cupular-auriculiform; areola of the 
neuter flower ovate-lanceolate in outline, very distinct. Female flowers 3-3°5 mm. 
long. Fruiting perianth explanate (not pedicelliform); the calyx finely striately veined 
divided into 3 broad, ovate, suddenly apiculate lobes; the segments of the corolla 
broadly lanceolate, acuminate, as long as the calyx and also striately veined. Fruit 
globose, small, about 1 cm. in diam.; scales in 12 series, shining, yellowish-brown, 
narrowly channelled along the middle with a rather dark narrow marginal and 
towards the rather obtuse tip broadening line, the margin finely ciliate-fringed. Seed 
orbicular, convex and deeply pitted on the back, concave on the raphal sido, 7 mm. 
broad, its surface when dry densely hairy-velvety, being covered with numerous 
elongate filamentose adherent cellules belonging to the integument, of which the 
fleshy part has been destroyed; albumen equable; embryo basal. 9 
Hasitat.—The Malayan Peninsula at Batu Pahat in the State of Johore (H. AM, 
Ridley, Nov. 1900, No. 11126 in Herb. Becc. and No. 11216 in Herb. Kew); at 
Singapore, Ponggol Rd. Ridley (No. 11304). Ridley l.c. indicates also the localities 
of Serangoon Rd. and Changi (No. 6275) in Singapore; of Sungei (River) Tebrau, 
and of Kuala Pakang in Pahang. Malay name “Rotang Bakau” (Ridley). 
Oxservations.—Evidently related to ©. Zollingerii, ovoideus and andamanicus, but 
entirely distinct from all. 
Amongst the species of Calamus of which the freit is known to me, this only 
has a seed with a velvety surface, apparently produced by the partial destruction of 
the integument which is probably fleshy when fresh and afterwards leaves the more 
persistent cells of its tissue adherent to the testa of the seed, It is furthermore 
distinguished from the other species of the group by the leaves with numerous 
equidistant ensiform unicostate leaflets, which are smooth in the upper surface and 
are finely bristly-spmulous on 3 and even 5 nerves beneath and furthermore 
sprinkled there with very small rusty scales, and by the small globose fruit with 
the scales finely ciliate-fringed at the margin. 
Pirate 168,—Calamus aquatilis Ridley. The summit of a leaf; an entire partial 
inflorescence from a male spadix.—Ridley’s specimen in Herb. Becc. 
Prate 169.—Calamus aquatilis Ridley, Portion of a leaf, upper surface, not very 
far above its base; two portions of the fruit-spadix; detached mature fruit; seeds 
from dorsal and raphal side, one longitudinally cut through the embryo.—From 
Ridley's specimen in Herb, Becc. 
142, Carawus WanBURGU K. Schum. in Schum. und Laut. Fl deutschen Schutz. 
in der Südsee, 203, | 
