504 ANWALS OF THE BOYAL BOTANIC GARDEN, CALCUTTA.
D E S C R I P T I O N OF P L A T E I.
{All figurei enlarged 6 diam. )
FIQ. 1.—( This aod the following S figures represent analyses of 0. ereclus. ) Tortion of s
male spikelet with asymmetrically infaudibuliioroi spathels ( k ) and cupular involuores ( i ) ; theas
inserted inside their own spathel at the base of. tlie one aboTe.
FIG. 2.—Portion of a male spikelet out longitudinally, the involuores (b) are half immersed
in the spathels ( A ) ; ia the upper part is tlie calyx ( rf ) of two flowers still attached to their
inToIucre.
FIG. 3.—Outline of fig. 2 showing the relative position of spatliels ÎA) and involucre ( i );
the dotted line completes that portion of the margin of the spathel not seen in fig. 2.
FIG. 4.—An entire male flower ( full-grown bud ) with oalys and corolla.
FIG. 5.—The corolla alonè, from a male flower.
FIG. 6.—Petal of a male Sower with 3 stamens and the abortive
in theii midst.
FIG. 7.—A detached stamen from an unexpanded flower.
Fio. 8.—Portion of a female spikelet stripped of its flowers and showing the cupular involucre
( 6 ) which has two suporfioial teeth { separated by a slightly excavate sinus ) on the outer side,
namely on that corresponding to tbe areola of the neuter flower ( e ) ; with its scar ( ) ; the
two teeth of the involucre correspond to the boms of the lunate areola.
FIG. 9.—Longitudinal section of a portion of a female spikelet; it shows the relative position
of the spathel ( A ), of the involucrophorum ( a ) and of the involucre ( i ).
PIG. 10.—Portion of a female spikelet of C. Flageiium before the expaasion of the flowers.
At the mouth of the upper spathel ( A ) is a female flower [ d e ) accompanied by its neuter flower
( / ) ; the female flower is enveloped at its base by the involucre ( b ), and more externally by
the involucrophorum ( a ) ; the lower female flower is without its companion or neuter flower
which was attached in {h) on the lunate areola (c).
FIG. 1L—Portion of a female spikelet of C. Scipionum stripped of its flowers ; the involuoroptora
{a ) are short, subcupuliform, attached almost outside their own spathel ( A ) at the base
of the one above ; the involucre ( ) is shallow and subdiscoid, slightly bidentate and excavate on
the outer marsiii ; the areola of the neuter flower ( c ) is depressedly lunate with a very
distinct scar (i^) where was inserted the neuter flower.
FIG. 12,—Longitudinal section of the above showing the relative position of the involucrophora
( a ) , involucre ( b ) and spathels (A).
DESCRIPTION OF PLATE n.
( Fig. 1 enlarged about 2 diam., all the oiheis 6 diam. )
F i e . 1.—Portion of a spikelet of C. uni/arius var. Pentong. The involucrophorum ( a ) is
inserted laterally on the spathel above its own and just outside the mouth of this (A ) ; it is
pediceiUforza with a small limb, and is furnished at its base with a very conspicuous axillary
alius ( » ) and a distinct transversal { apparently nectariflous) rima; the involucre ( ¿ ) is almots
BECCIAiJI. MONOGEAPH OF THE OENTJS CALAMUS. 505
flat and discoid; the areola of the neuter flower ( c ) is represented by a small tubercle; the
fruiting perianth ( o ) is pedicelliform.
FIG. 2.—Portion of a female partial inflorescence of G. ZolUmjcrii, with the basal part of the
spikelets beating ovaries in course of development; the secondary spathes ( i n ) are out open on
their anterior part to show the insertion of the spikelets to tho bottom of their respective spathes
by means of a distinct pedicellar part { I ) .
FIG. 3.—Portion of a fruiting spikelet of 0. diilymooarpus stripped of its fruits; in its upper
part is the insertion of two gorainate fruits, which have a single involucrophorum ( a ) and two
shallowly cupular involucres ' J ) ; these united by their inner sides and with the trace of an areola
( tf ) for the reception of the neuter flower in the midst; in the lower part of the figure is the
insertion of a fruit, solitary as ia most species, with the involucrophorum {a } as above, the
involucre ( b ) cupular furnished externally with a very dbtinet areola ( c ) and this marked by a
coDSpicuous soar (A) where was attached the neuter flower; ia both eases the involucrophorum is
inserted laterally at the base of the spathel above ita own and is conspicuously bidentate above on
the side nest to the axis.
FIG. 4..—( This and the following figure? belong to C. Oriffithianus. ) Portion of a male
spikelet with broadly infundibular spathels ( k ) , each spathel bearing attached to its bottom a
subpedicellate involucrophorum ( h ).
FIG. 5.—Male flower open showing the stamens coalesoent at their base with the corolla, and
the central abortive ovarium ( n ).
subpedicellate involucrophorum ( a ),
this seen in profile.
FIG. 6.—Female flower during anthesis with a
the involucre ( i ) with the neuter flower ( / ) in its
FIG. 7.—Another female flower with its involucres during anthesis.
FIG. S.—Female flower with its involucre still closed, with I front view of the ovate acute
and sharply bordered areola ( c ).
iew of the involucrophorum { a ) - this Sat and
FIG. 10.—Female flower, divested of its involucre, with oalyx ( r f ) and corolla ( « ).
FIG. 11.—Female flower cut open, to which has been carried the calyx and a portion of
the corolla; it shows the internal staminal tube ( g ) which envelopes the ovary and the abortive
erect sagittate anthers.
FIG. 12.—Neuter flower with calyx and corolla and six stamens; these have subulate filament
inflected at their apex and bear effete anthers; in the centre is the rudimentary ovary ( n ).
N.B.~U both plates the letters iadicato tho 6 oi^iins s
(0) Involuoroplioi-uiu,
(5) Jiivolucre,
(c) Arcolii of the neulsr lower,
(d) Cfllyi.
(1) Cotollii,
(de) Foiiiale flower^
(f) Neuter flower,
(jr) Slaminal urccolum of tho female
(A) The scar or point of irnertion o
(») Aiillary callus with traoiverial rii
(i) Spftthcl.,
(J) Peduncular part of (Jie apikel«t,
(m) Secondary apatbei,
(«) Abortive ovary.
<o) Fruiting peranth.
ANN. ROY. BOT. GAHD. CALCUTTA, VOL. X I.