- €. nicobaricus.] BEOCARL MONOGRAPH OF THE GENUS CALAMUS. 249 
seen entire) simply decompound; partial inflorescences 15-30 cm. long, with very few 
remote spikelets on each side; secondary spathes as in the male spadix but larger; 
spikelets spreading or recurved, inserted above the mouth of their own spathe anid 
callous at their upper axilla, 8-12 cm. long; their axis cylindraceous and slightly 
sinuous, with 14-15 horizontally inserted distichous and very remote (5-7 mm. apart) 
flowers on each side; spathels as in the male spikelets; involucrophorum laterally 
adnate outside its own spathel at the base of the one above and nearly hollowed into 
this, shallowly cupular with a very short sub-entire limb; involucre moulded on the 
involucrophorum and not exceeding this, with entire or faintly undulate lobulate margin; 
areola of the neuter flower depressed-lunate, very distinctly tumescent and oldik. 
Female flowers about 4 mm. long, conical, acute, very broad at the base; calyx very 
thick, callous at the base, shortly 3-toothed; stamens forming by the connate bases of 
the filaments an urceolum which is crowned by 6 very broad and short teeth; sterile 
anthers very broadly sagittate. Fruit unknown, 
Hasrrat,—Tenasserim (or Andaman Islands?) where collected by Helfer (male 
specimens, No. 6389; fem. sp. No. 6393 in Herb. Kew). In the Caleutta Herbarium 
a male specimen, also of Helfer, bears the label: Tenasserim No. 6589. 
OnsERVATIONS.—Apparently very closely related to C. delicatulus of Ceylon; but in 
this the leaflets are not fascicled, the spikelets are more slender and the flowers smaller. 
The position of this species however remains uncertain, the fruit not being known. 
The characteristics of C. Helferianus are: the leaflets very distinctly grouped, equidistant 
and disposed on one plane in each group, linear-lanceolate, sub-5-costulate, the 3 costulae 
of the centre spinulous above and smooth beneath; the d and ? spadices very long 
and very slender; the spathes very narrow and long and very closely sheathing; the 
$9 and d flowers horizontally inserted, the d 1°5-2 mm. apart, the ¢ more remote 
or 5-7 mm. apart. 
A specimen of a leaf from Helfer’s No. 6389 in Herb. Petrop. is more robust 
than the others, the groups are formed by 8 leaflets on each side and some of them 
are 40 cm. long and 25 cm. broad. : 
PLATE 83.—Calamus Helferianus Kurz. Male partial inflorescences with top of a 
leaf, from Helfer’s No. 6589 in the Calcutta Herb.; the portion of the leaf with two 
fascicles of leaflets and a female partial inflorescence (on the right-hand side) from 
Helfer’s No. 6393 in Herb. Kew. 
68. CaraMus nicopartcus Becc. in Hook. f. Fl. Brit. Ind. vi, 446 and in 
Rec. Bot. Surv. Ind. ii, 206. 
DzscnIPTIoN.— Very slender. Sheathed stem 7-14 mm. in diam.; naked canes 5-10 
mm. in diam. with a polished vernicose yellowish surface, tbe internodes 10-25 
em. long,  Zeaf-sheaihs very light-coloured (when dry), slightly gibbous above, obliquely 
truncate at the mouth, furfuraceous when young, then glabrous, densely armed with 
numerous, unequal, scattered, elastic, flat, thin, relatively large, deflexed spines, which 
sometimes are 2*5 em, long and 2-3 mm. broad at their base; these intermingled 
with others much smaller or even tuberculiform, all entirely light-coloured.  Lea/-sheath 
Anx, Roy. Bor. Garp. Catcutra Vor. XI. 
