C. Heudelotii | BECCARI. MONOGRAPH OF THE GENUS CALAMUS. 155 
furnished with some very smail spinules; transverse veinlets rather remote and much 
interrupted; margins very closely spinulous with a slender nerve running along 
them ; the largest leaflets, those near the base, 15-18 cm. long, by 10-13 mm. 
in breadth. Other parts unknown. 
HanrrAT.— West tropical Africa at Onitscha on the River Niger (Barter 
No. 110 in Herb, Kew). 
OssERVATIONS.— Of this species I have seen the upper portion of a sterile plant 
with the sheathed stem 6 mm. in diam. Amongst the African Calami, this seems 
well defined by the well-marked clustered arrangement of the leaflets. Judging 
from the general structure of the leaf.sheath flagella, which are morphologically 
sterile spadices, we may suppose that the spadices in C. Barter ought to be very 
like those of C. deerratus, but this is a much larger plant with strongly armed 
sheaths and numerous subequidistant leaflets. I have considered as a new species 
(vide C. falabensis) the specimens described by Drude (l. c.) as the male 
plant of 0. Barterii. The canes are much employed in the lower part of the 
River Niger for tying. The fruit is said to be small and dark brown when ripe 
(Barter). 
Pirate 20.—Calamus Barterii Bece, The entire Barter’s specimen No. 110 in the 
Herbarium at Kew. 
15, Catamus Heuperorm Becc. in Herb. Kew.; Drude in Engl. Bot. Jahrb. 
xxi, (1896), pp. 112 and 134; Becc. in Rec. Bot. Surv. Ind, ii, 199 
Wright in Fl. Trop. Afr. viii, 109. : 
DrscnrPTION.—.Slender, not very high, scandent (2-3 m., Heudelot). Sheathed stem 
about 1 cm. in diam,  .Leaf-sheaths flagelliferous, partially and fugaciously furfuraceous 
greenish even when dry, longitudinally striate, slightly gibbous above, armed with 
scattered, solitary, very small, horizontal, semiconical spines. Leaf-sheath flagella 
filiform, slender, about 1 m. long, their lowest spathe flattened, scantily aculeate 
on the sharp edges; the succeeding spathes cylindraceous, more or less clawed; 
the apical portion nearly terete, armed with 2-3-nate claws. Ocrea conspicuous, 
externally produced into a ligule which is 2 cm. long, obliquely cut like the mouth 
of a beaked flute, entire, with smooth margins and sirgularly ornamented externally 
with closely seriated laminar, lacerated or comb-like, 4-5 mm. long spines. Leaves 
(not seen entire) about 60-70 ecm, long, not cirriferous; petiole short (7-8 cm. 
long) flattish on its upper face, acute at the sides, where armed with some 
straight horizontal spines which become hooked upwards (as in the first portion 
of the rachis), rounded on the lower face near the base, and armed there along 
the middle with a few strong, rather long (10-12 mm.), solitary, straight, somewhat 
deflexed, black-tipped spines, which rest on a large swollen base and gradually 
diéfthso: in length and are transformed into claws along the rachis; the rachis 
is flat and deeply channelled laterally (where are inserted the leaflets) in 
its first portion, and upwards is bifaced with an acute naked angle above; leaflets 
not very numerous, perhaps 18-20. on each side, very patent and sometimes 
horizontal in fully developed leaves, more or less irregularly grouped in fascicles 
Ann, Roy. Bor. Garp. Catcurra Vor. XI. 
