72 ANNALS OF THE ROYAL BOTANIC GARDEN, CALCUTTA. [D. trichrous. 
ciliate. Female spadiz erect, sessile or nearly so, ventricose-fusiform before flowering, 
almost gradually narrowing into a beak about as long as the body, with 5-6 very 
approximate partial inflorescences; outer spathes cymbiform, acutely two-keeled, thinly 
coriaceous, not very densely armed with thinly and narrowly laminar, short or 1-2 cm. 
long, scattered, usually deflexed spines, which are not distinctly callous at their base ; 
the second spathe also more or less covered with appressed spines; the others unarmed; 
partial inflorescences 5-7 cm. long with 8-10 spikelets in all; the largest of these, the 
lower ones, 3-4 cm. long, with 4-5 flowers on each side and with the spaces between 
two flowers acutely angular and 2-4 mm. long; spathels bracteiform, amplectent, 
extended at one side into a broadly triangular, acute limb, which is slightly shorter 
than the involucrophorum; the latter very short (1-2 mm. long), distinctly callous at its 
axilla, obconical and expanded at its apex into a obliquely or asymmetrically 
cymbiform limb which is produced externally into a triangular acute point; 
involucre exactly cupular, truncate, entire ; areola of the neuter flower very distinct, 
and tumescent on its upper margin. Female flowers to be described exactly in the 
same words as those of C. angustifolius. Neuter flowers slender, obsoletely 3-gonous, 
5 mm. long, narrowing towards a rather acute apex; the corolla about twice, 
or somewhat less, as long as the calyx. Fruiting perianth explanate. Fruit spadiz 
15-20 em. long, dense, broadly ovate-thyrsoid. Fruit globose, very shortly and 
suddenly conically beaked, 14-15 mm. in diameter; scales in 14 longitudinal series, very 
superficially channelled along the centre, shining, yellowish or reddish-brown, usually 
with a whitish scariose erosely-toothed margin and a darker intramarginal line, the 
tip slightly prolonged and obtuse, marked with a very dark spot; sometimes above 
the dark spot of the tip may be found a white area, while the dark-coloured part 
extends at the sides along the margins. Seed broader than high, somewhat flattened, 
12 mm. long, 11 mm. high, 9 mm. thick. 
Hasrrat.—Sumatra, in the province of Palembang at Muara dua and at Batu rajah, 
and also in the Island of Bangka (Teysmann). Malayan name “Rotan Ghetta," 
in Bangka “Rotang Kikier and “R. Bongkus" in Sumatra (Teijsmann). 
OBSERVATIONS,—Of ‘Teijsmann’s type specimen I have seen some loose fruits 
bearing the No. 3582 of the Herb. Bogor. in the Caleutta and Utrecht Herbaria. 
I have also received from Dr. Treub some good specimens from plants culti- 
vated at Buitenzorg, undoubtedly belonging to this species. One, labelled ** Calamus 
sp. Sumatra, R. Geta” has a small male spadix 13 cm. long, including the beak, which 
is about as long as the body ; the spiklets and the male flowers are exactly like those 
of D. angustifolius ; but the second spathe bears a few spines on the two superficial 
carine ; the armature of the outer one does not differ from that described for the 
female spadix. 
Another cultivated specimen is labelled ‘ Calamus sp. Bangka. R, Geta” and 
bears mature fruits. The fruit scales are very variable in the same spadix as to the 
colour of their margins and tips. The mature fruit apparently does not as in D, 
melanochaeles easily detach itself from the involucre bringing with it the fruiting perianth, 
- go that the latter remains attached to the involucre while the fruit falls without it. 
