tie een 
UNDE : : 
CYCAS. 9 
up to a late period, only one is to be found, containing homo- 
geneous solid cellular tissue. 
2. Cycas Jenkinsiana, Gr. Pls, CCCLX. Figs. 1, 2. 
CCCLXII. Fig. 1. 
Trunk, often branched, sometimes 3 feet in diameter: in 
the specimen about 5 inches in diameter, marked externally 
with the persistent bases of the petioles, in some places almost 
annulated and nearly smooth. Here and there occur rings of 
smaller petiole bases, mixed with brown wool, marking the 
number of inflorescence. 
Leaves about 4 feet long : naked lower part of the petiole 
14 to 16 inches long, canaliculate, convex, with teeth-like 
straight solitary distant prickles along the margins, Pinnze 
very many, 7 or 8 inches long, 34 lines broad, outline decid- 
edly falcate, lower margin decurrent: they are very coriace- 
ous, unequally and very obtusely emarginate, points almost 
always broken, with one stout vein prominent on both sides. 
Female inflorescence forming a dense terminal head, sur- 
rounded by several rows of abortive leaves, subulate from a 
dilated base entirely covered with pale rust-colored wool. 
Carpel leaves erect, connivent, scarcely more than 5 inches 
long, of which nearly } consists of a cordate acuminate lamina, 
deeply subulato-pectinate, the acumen stout and entire. In 
the upper half of the elaminar part are the ovula 1-2 in the 
outermost, 4-5 in the innermost. These carpel leaves are 
covered (except parts of the inner side of the lamina and 
the points of the pectinations) with dense rust-colored 
wool. 
Qvula smooth, roundish compressed bases buried in niches 
(marginal) of the carpel leaves, with a distinct perforated 
apiculus. 
impregnation. As these unimpregnated sacs are short confined to the 
. apex of the fruit ; how does the Embryo get so low down in the albu- 
men? by percursion of the sac? or by enlargement of a particular one. 
B 
