C. pseudo-tenuis| ^ BECCARI MONOGRAPH OF THE GENUS CALAMUS. 225 
their bases, subulate, shortly inflected at the apex when in bud, their anthers versa- 
tile, elongate-sagittate, rather acute; the rudimentary ovary very small, reaching 
little above the base of the filaments, Female spadic similar to the male one, but 
simply decompound; primary spathes as described above; partial inflorescences very 
long, 80-90 cm. long and sometimes more, with 8-9 distichous spikelets on each side, 
with a straight siender 8-10 cm. long aculeolate appendix at its apex; secondary 
spathes about 5 em. long, sparsely aculeolate or smooth; attenuate at the base 
where concave on the inner side, convex externally and prolonged at the apex. 
into a triangular acute point; spikelets flexuose, slender, patent and ultimately 
horizontal and slightly arched, not or very slightly callous in their axilla, inserted 
just at the mouth of their respective spathes, 15-27 cm. long, with 12-22 flowers. 
on each side, or even shorter and with fewer flowers; spathels infundibuliform, truncate: 
smooth, acute at one side; involucrophorum very short subcupular, attached to and 
nearly excavate into the base of the spathel above its own; involucre small, shallowly 
cupular, slightly projecting from the involucrophorum; areola of the neuter flower 
depressedly lunate, callous, very sharply bordered, Female flowers small, 3 mm. 
long; the calyx divided into three subcoriaceous ovate-acute lobes; the corolla as long 
as the calyx, its segments ovate-acute ; the filaments of the stamens highly connate 
by their bases, shortly dentiform in the free portion. Neuter flowers very similar 
to the fertile ones and only a little smaller. Fruiting perianth almost explanate (not 
pedicelliform) but with the calyx slightly callous at the base. Fruit (when not 
perfectly mature) 10 mm. long, 7 mm. broad, ovate or rather subobovoid, somewhat 
tapering towards the base and rather suddenly beaked at the apex; scalesin 18 
series, polished, convex, not channelled along the middle, straw-yellow at their base, 
with a broad chestnut-brown triangular point; margins finely erosely toothed. Seed 
(immature) subglobose ; albumen: equable.—The young parts of the spadix, the petiole 
and leaf-rachis are covered with a rusty-brown or tawny, easily removeable indu- 
mentum, 
Hasirat.—Ceylon: in the hottest parts of the island, as at Balangodde and at 
Matette Thwaites C. P. No. 2385 in Herb. Kew.  Petrop, etc. In the Indian 
Peninsula; near Madras, G. Thomson; Cochin, Wight No. 2759;  Annamally and 
Nadooputtah, Wight No. 2758 in Herb. Kew., Petrop, Webb and Vindob. 
Anmode in XN. Kanara, Talbot No. 2857 in Herb. Kew.; Gudalees Ghat, at 
1650 m., Gamble; Goodaloor, 1400 m., Wynaad, C. B. Clarke in Herb. Bece, 
OBSERVATIONS,—(. pseudo-tenuis is distinguished at once from C., tenuis by its 
explanate, not pedicelliform perianth; its nearest affinities are perhaps with C. viminalis 
Willd., from which it differs in the equidistant leaflets, clawed leaf-rachis, ovoid fruit, 
etc. I consider as type-specimens of C. pseudo-tenuis those from Ceylon distributed 
by Thwaites. The continental specimens may be considered as belonging toa special 
geographical form; they have more elongate male spadices and more remote and 
longer partial inflorescences; one of these is 90 cm. long with 9 compound spikes on 
each side, each spike bearing 30-40 spikelets in all. Another is only 45 cm. with 
12 compound spikes. In the female spadix and in the leaves I cannot find the 
slightest difference between the continental and the insular specimens. 
Ann. Rox Bor, Garp. CarcurTA Vor, XI. 
