ANNALS OF THE KOYAL BOTANIC GAtiDEN, CALCUTTA.
Outer spathe faintly two-keeled. Fruit spherical, mucronate,
D. monticolus var. p/'nangianus-
( i ; crowded to the summit of the plant.
Spadix when unopened shortly beaked,
Leaf-slieaths about 3 cm. in diameter, armed with flat, !
seriate spines. Leaflets of radical leaves not distinctly 3-co8tulate.
The beak of the outer spathe forming the third or
fourth part of the entire spadix.
26. D. Leuiisianus.
Leaf-sheaths 15—20 mm. in diameter, armed witii solitary or seriate
but indindually distinct spines. Rachis of the leaves of the
upper part of the plant armed on the lower surface with
digitate claws; leaflets of the radical leaves distinctly 3-costulate,
27. 0. petiolaris.
Leaf-sheaths about 10 mm. in diameter, very sparingly armed with
solitary spines. Leaves of the upper part of the plant very
small, 15—18 cm. long, inclusive of a very short cirrus; their
rachis armed on the lower surface with solitary, almost
straight claws,
28. 0. microthamnus.
Spadix when unopened long or moderately beaked.
Spadix ventricose, fusiform, suddenly narrowing into a beak as
long as or longer than the body. Outer spathe armed with
very many narrowly laminar spines. Leaf-sheaths armed with
seriate individually distinct spines.
29. D. tabacinus.
Spadix fusiform, moderately beaked. Outer spathe entirely covered
with criniform crispate spiculae. Leaf-sheaths armed with
approximate whorls of spines confluent by their bases.
30. D. caUoarpus.
I L Anomalous. Leaf-sheaths with the ocrea transformed into two very long
stipuliform appendages at the sides of the petiole.
81. D. ursinus.
HECCAEI, THE SPKCIES OF DAEMO^OBOPS.
KEY TO THE SPECIES OF THE SECTION PIPTOSPATHA.
A. Leaf-sheaths armed with isolated or confluent spines, not with annular
crests. Spathcs coriaceous, tubular before the anthesis, then opec flat. Male
flowering panicle very narrow, strict, cupressiform.
I. Spathes coriaceous, tubular before flowering, produced at the apex into a
tail-like bristly tip, Outer spathe in the unopened spadices almost
entirely eQcIosing all the others (in D. Loherianiis, each gradually
longer than that immediately below.) Mouth of the leaf-fiheaths not
armed with very long erect spines, or quite smooth.
a. Outer spathe slightly shorter than the inner ones.
* Leaf-sheaths very densely armed with robust spines, ("Leaf-sheaths
unknown in D. rolustus.)
very robust large and
ellipsoid, with yellowish
Loaf-siieaths strongly armed with
unequal laminar spines. Fruit
green scales.
82. D. macropterus.
Leaf-sheaths entirely covered with narrow very long needlelike
spines. Fruit unknown,
33. D. Sarasinorum.
Leaf-sheaths . Fruit spherical with greenish and yellow
34. D. robustus.
** Leaf-sheaths armed with scattered slender flabby spines.
Fruit ellipsoid with yellowish green shining scales.
35. D- lamprolepis.
F r a i t roundish, with reddish brown scales.
36. D. niger.
h. Outer spathe in the unopened spadix considerably shorter than the
inner ones (as in the species of the group of D, Hyslrix),
Mouth of the leaf-sheaths quite smooth. Male flowers very
long and narrow, their calyx elongated, tubular, the corolla 3
times as long as tho calyx.
31. D. Loherianus.
I I . Outer spathe of the unopened spadix considerably shorter than the
inner ones and terminating in a triangular often bidentate point. (In 2),
Motleyi and D. did//moph/;Uus the inner spathes slightly protrude beyond
those immediately below).
ANN. ROT. BOT. GARD,, CALCUTTA, Vor,. X I L