IN CEYLON. 
209 
corolla, and staminodes removed ; (5) pistil figured from above to show 
crenate bifid stigma. 
D. hirsute (6-12). (6) Male inflorescence ; (7) female inflorescence; 
(8) polygamous group (a) female flower ; (b) male flowers ; (9) 
monoecious group (a) female ; (b) male ; (10) fruit and calyx ; (11) 
seeds exposed after carpellary wall removed ; (12) longitudinal section 
of seed showing embryo. 
Plate XVI. —Nat. size. 
D. Thwaitesii (1-6). (1) Male flowers ; (2) female flowers ; (3) 
polygamous group (a) female (b) male flowers ; (4) monoecious state 
(a) female (b) male cluster ; (5) fruit and calyx ; (6) young seedling. 
D. montana (7-10). (7) fruits and leaf ; (8) section through fruit 
showing seeds and embryos in situ ; (9) male flower ; (10) female 
inflorescence. 
Plate XVII. —Nat. size. 
D. insignis (1-3). (1) G erminated seed representing a stage of the 
seedling when the cotyledons are detached, but the epicotyledonary 
system not liberated ; (2) a later stage showing the hypocotyl less than 
one cm. in length and young epicotyledonary stem ; (3) an old 
seedling showing short hypocotyl, long epicotyledonary stem with 
rudimentary leaves along its length and a pair of large leaves at the 
apex. 
D. Toposia. (4) Seedling showing median length for hypocotyl and 
long epicotyledonary stem without leaf rudiments. 
D. sylvatica (6-6). (5) young seedling ; (6) mature seedling with 
long hypocotyl and a pair of persistent foliaceous cotyledons. Note 
the absence of epicotyledonary leaves. 
The first pair of leaves in the seedlings of these three species are 
approximately the same height above the ground. 
Plate XVIII. —Nat. size except 6 to 8. 
D. pruriens (1-5). (1) Seed showing; embryo ; (2) young seedling ; 
(3) seedling with white cotyledons attached at cotyledonary node ; 
(4) stage showing the shrivelled cotyledons after a few hours’ exposure 
and the enhanced epicotyledonary leaves ; (5) mature seedling showing 
cotyledons detached and a scar at the cotyledonary node, an epicoty¬ 
ledonary stem about one cm. in length, and the first pair of epicoty¬ 
ledonary leaves as an opposite pair similar to the cotyledons of 
D. sylvatica. 
Embryos (6-8). f6) D. crumenata (X 2) ; (7) D. Embryopteris 
( X 2) ; (8) D. Ebenum ( x 2); (9) seedling of D. Embryopteris 
showing the pale cotyledons prior to being detached and just exposed 
by removal of the testa and endosperm ; note the long epicotyledonary 
hairy stem between cotyledons, (cf. fig 6, pi. XVII.) 
