C. denningsianus.} PECCARL THE SPECIES OF CALAMUS.—SUPPLEMENT. 91 
Osservations.—A very singular species of the group of C. palustris, related 
only to €. Jenningstanus, but quite distinct especially by its geminate female flowers 
in the lower part of the spikelets. 
SuppL. Prare 50.—Calamus Arugda Becc. Intermediate portion of a leaf; 
terminal part of a spadix; detached young fruits. The type specimen No. 6649 
in the Herbarium st Manila. 
147b. Cacamus JrNNINGSIANUS Becc. in Philip. Journ, Science, iv, (1909) 623. 
DescrirTion.—Scandent, of moderate size. Sheathed stem apparently 2:5 cm. in 
diameter  Leaf-sheaihs rather densely armed with small, rigid and short (4—5 mm. 
long) horizontal spiculae, which rest on a bulbous base. Cerea shortly liguliform, 
glabrous. Leaves terminating in a robust cirrus, and about 80 cm. long in the 
pinniferous part; the petiole about 10 mm. broad and 12 em. long (iu one specimen), 
quite flat above where sprinkled with small and straight erect spines, convex and 
smooth beneath, its margins acute and sparingly prickly; rachis flattish beneath, 
where, but only towards the summit, it is armed with semiverticillate claws: the 
lower surface is quite smooth: upper suríace of racbis prickly near the base but 
otherwise smooth, and with a not very acute salient angle; the cirrus is strongly 
armed with three-quarter-verticilled claws. Leaflets not very numerous, equidistant, 
rather remotely set (4-5 cm. apart on each side), elliptical-lanceolate, broadest 
about their middle, and equally narrowing to both ends, gradually acuminate to an 
inconspicuously bristly tip, the base acute, rigidly papyraceous, green on both surfaces, 
but paler beneath than above, 3-5-costulate; the costae very sharp above, smooth 
on both surfaces with the exception of 1-2 spinules which are occasionally to be 
found at the base of the mid-costa of upper surface; transverse veinlets minute, 
much interrupted, not very prominent; margins minutely spinulous near the apex, 
otherwise smooth. The intermediate leaflets are 22-25 em. long., 30-32 mm. broad, 
the others somewhat smaller, but of the same form. Male spadix . . . Female 
spadix apparently not very elongate, terminating in a short tail-like appendage; 
primary spathes thinly coriaceous, those of the apical portion of the spadix (the 
others not seen by me) flattened, tubulur in their lower part, enlarged above and 
open on the ventral side, terminating in a triangular, acuminate, acutely keeled 
point, the keel spinous; secondary spathes infundibuliform, rather loosely sheathing, 
unarmed, obliquely truncate and ciliolate at the mouth, produced at one side into a 
short deltoid point; spikelets short, 2-3 em. long, scorpioid, rather thick, with very 
few (4-5 in all) alternate flowers; the spikelets of the lower part of the partial 
inflorescences probably longer and with a few more flowers. Spathels infundibuliform, 
obliquely truncate, very shortly produced into a rather broad triangular point at one 
side, obscurely dorsally keeled ; involucrophorum obliquely attached to the base of the 
spathel above its own, shallowly cupular, bidentate on the posticous or axial side; 
involucre shallowly cupular with irregular, undulate margin; areola of the neuter flower 
depressedly lunate, sharply bordered. ^ rui$ broadly ovoid-elliptical, about 25 mm. 
long, 18 mm. broad, very suddenly and conspicuously beaked ; scales arranged in 
12 longitudinal series, relatively thick, strongly convex, deeply grooved along the 
centre, of a straw.yellow colour, with a very narrow blackish marginal line, the 
point also blackish and very slightly produced. -Seed globular, but not exactly 
Ann. Roy. Bor. Garp. Carcurra Vor. XI. 
