Bennettites. 
Female Cone. 
Axis extremely short and 
flattened. 
Linear-lanceolate bracts 
permanently ensheath- 
ing entire cone. 
Sporophylls radial in 
structure. 
Ovules terminal on sporo- 
phyll. 
Sporophylls terminal and 
sub-terminal to axis of 
cone. 
Interstitial organs (sterile 
sporophylls?) between 
the fertile sporophylls 
which overtop and en¬ 
velop latter. 
Two fleshy, hypogaeal 
cotyledons; very little 
endosperm to be seen. 
Notes. 
Modern Cycads. 
Female Cone. 
Axis much elongated. 
Linear-lanceolate bracts 
ensheathing entire cone 
when young. 
Sporophylls usually ra¬ 
dial or subradial in 
structure (that of Cycas 
dorsiventral, but its 
ovuliferous segments 
radial ). 
Ovules marginal or sub¬ 
dorsal on sporophyll 
(those of Cycas ter¬ 
minal to segments of 
sporophyll). 
Sporophylls mostly la¬ 
teral, upper ones ter¬ 
minal to axis of cone. 
Interstitial organs absent; 
protection afforded by 
swollen terminal por¬ 
tion of each fertile 
sporophyll. 
Two fleshy, hypogaeal 
cotyledons embedded 
in endosperm of seed. 
721 
Ginkgo. 
Female Cone. 
Axis much elongated. 
Sporophylls when (as in 
abnormalities) deve¬ 
loped, radial in struc¬ 
ture. 
Ovules terminal on sporo¬ 
phyll. 
Sporophylls both termi¬ 
nal and lateral to axis 
of cone. 
Ovules exposed, without 
any protective covering. 
Two fleshy, hypogaeal 
cotyledons embedded in 
endosperm of seed. 
Kew ,Jnne 29, 1900. 
W. C. WORSDELL. 
