186 ANNALS OF THE EOYAL BOTAMO GAJIDEN. CALCDTTA- [Q. fiUfomíS
Leaoe» short, on the whole 30-35 om. long with very few (1-2) pairs of lanceolate
or oblanceolate leaflets, the latter near the terminal pair; the lowest or basal pair
transformed into two opposite, straight, flat, rigid, spreading, acicular spines, which
are ;3-3"5 cm. long and inserted very near the mouth of the sheath; the long racant
space of rachis between these spines and the leaflets has the appearance of a petiole
and is densely furfuraceous and furnished with a very few straggling slender spines.
Female «/»arfji;" (small) shorter than the leaves, with very few partial inflorescences.
HABITAT.—Borneo in Sarawak on Mount Mattang at about 290 m. elevation:
collected by {Mr. R. E. Uullet in 1890).
OBSERVATIONS.—Of this very curious variety of C. javenak I have seen only one
specimen which was forwarded to me by Mr. H. N. Ridley. This variety is so
unlike any other that I should have been much tempted to assign to it a
distinct specific name had I not found among the numerous specimens in my
possession an intermediate form between this VAR. acicularit and the usual peninsulari^t.
In this intermediate specimen, collected by F. Keheding in 1S79 at Klang in the
Malay Península, the spines at the base of the petiole are shorter, but have the
same morphological value and are in the same place as in VAR. aeicularis, and
consequently the leaves appear as if furnished with a very long furfuraceous
petiole and have 2-3 pairs of leaflets approximate to the two of the terminal pair.
PLATE 41.—Calamus javensis var. aeicularis Beco. The entire specimen described
above (Herb. Beccari),
32. CALAMOS FILIPORMIS Becc. Nelle Foreste di Borneo, 607, 608, and in Ree.
Bot. Surv. Ind. ii, 201.
DESCBIPTIOS. Exceedingly slender and delicate. Sheathed stem 3-5 ram. in diam.
Leaf-aheaths flagelliferous, sparingly armed with small, short, scattered, slightly
hooked aeulei or quite smooth. Leaves 25-40 cm. long; petiole very short or
filmost wanting; leaflets 5-6 on each side, somewhat in equidistant, alternate or
subopposite, 3-costate, very narrowly lanceolate and very gradually attenuate at the base
and acuminate at the apex, 8-12 cm. long, 8-14 mm. broad, the two of the terminal
pair more or less highly connate at the base, the two of the basal pair deflexed and
somewhat callous at their insertions. Male spadix Female apadix filiform,
very slender, with very few (1-3) partial inflorescences which are reduced to a single
very slender spikelet 5-6 cm. long with 16-17 pectinate flowers on each side;
spathels obtuse with few strong and distinct nerves; involucrophorum laterallj
attached at the base of the spathel above its own, strongly striately veined as is the
involucre. Female flowers small, 2-5-3 mm. long; calyx callous at the base and
divided down to about the middle into 3 broad acute lobes, indistinctly striately
veined; corolla about twice as long as the calyx or somewhat less, divided almost to
t h e base into 3 lanceolate, acute segments; filaments of the stamens connate by
their bases and forming a membranous urceolum which is as long as the third part
of the corolla and is crowned with 6 broad, ovate-lanceolate, subulate teeth; anthers
deeply sagittate with obtuse apex.
C. corrugatus] BECCAJ?I. MONOGEAPH OP THE GENUS CALAMUS. 187
HABITAT.—Borneo; on Mount Mattang, near Kuching in Sarawak {Beccari P. B.
No. 1909.)—This species is represented in the Herbarium at Kcw by a female
flowering specimen collected by Lobb, very probably also in Sarawak. Native names
in Sarawak ' Rotang Jangut,' ' R . Battu,' « B. Kawat.'
I t produces the most slender Rotang known to me. It is very tough and of
very good quality, much employed by the natives for binding purposes, basketmaking,
etc.
OBSERVATIOKS.—This is perhaps not so much a distinct species as an aberrant
form of C. javensia closely related to VAR. tenuiasimug from which, however, it differsin
the infloresences being reduced to a single spikelet and in the more numerous
and narrower leaflets, of which the upper pair are usually highly connate as in the
different forms of 0. javensis.
PLATE 42.—Calamus flHformis Becc. The upper part of a plant with a female
spadix in flower and another intermediate portion, from P. B. No. 1909 in Herb.
Beccari.
33. CALAMUS COERUGATUS Beco. in Rec. Bot. S u r v . l u d . ii, 201.
DESCRIPTION.—Scandent; very long and slender. Shaihed stem 4-5 mm. in diam.
Lcaf-aheaihs flagelliferous, obHquely truncate at the mouth, unarmed, but conspicuously
marked by many approximate tranverse annular ridges or prominent wrinkles. Ocrea
very short, more or less liairy-furfuraceous. Leaf-shcaih fiagella very slender, filiform,
unamed in their basal portion and finely clawed upwards. Leaves short, 30-35 cm.
long, not cirriferous; petiole very short (about 1 cm. long), hajry-furfuraceous; rachisalso
furfuraceous, slender, filiform, almost round, striate longitudinally, armed below
with weak, solitary or ternate, semi-verticiHate claws ; leaflets very few (5 on each
side), perfectly opposite, forming remote pairs, elliptic-lanceolate, narrowed to the base,
•where acute and slightly callous at their insertion, subuktely acuminate at the
apex, thinly papyraceous, about the same colour on both surfaces, plicate longitudinally
and 'apparently many-nerved, but furnished with only three acute slender cost»
(which are naked on both surfaces) and some slender secondary nerves;
transverse veinlots sharp and rather approximate; margins acute, smooth; the
largest leaflets, the mesial, horizontal, 12-13 cm. long, 2-5 cm. broad, the two
of the terminal pair a little smaller than the side ones, united up to about
their middle, the two near the base, the »nallest, deflexed and callous at
their insertion. Spadiccs not seen.
HABITAT.—Borneo; on Mount Mattang, near Kuching in Sarawak {Beccari P. B.
No. 1910.)—Thero is a sterile specimen of this species in the Kew Herbarium
collected by Lobb, probably also in Sarawak, in 1853.
OBSIIRVATIONS.—This is a very elegant and delicate species, which produces one
of the smallest Rotangs of good quality. It is easily distinguished among those
of the group of G. javenais by the ridged or wrinkled, not spinous, surface of
t h e leaf-sheaths, and by the few, perfectly opposite and horizontal leaflets, which
are approximate on each side of the rachis in remote pairs.
AKN. E o r . BOT. SARD. CALCUTTA, VOL. X I .