104 A CYTOLOGICAL INVESTIGATION OF SOME SPIECES 
_ of a spikelet of Saccharum spontaneum, drawn from two microtome- 
( y ) the sections. It shows the presence of three glumes, a palea inferior 
~ anda palea superior. 

Fig. 1b. 
Fig. 1. Diagram of a spikelet of S. spontaneum. 
a. crosssection at the level of the ovule and the lodiculae; 
b. ra Ss „ of the anthers. 
Glume I is bicarinate and has two main veins; glume 2 is carinate, is 
placed opposite to glume 1 and is surrounded by the borders of the lat- 
ter, glume 3 is found inside of glume 1 and is coriaceous. The palea infe- 
rior is situated inside of glume 2, mostly linear and coriaceous and can 
be absent in the case of S. officinarum. The palea-superior is usually 
much shorter than the palea inferior and is very variable in shape. In- 
side of the two paleae there are three anthers, an ovary with two feathe- 
ry stigmata and two lodiculae. Inside of the ovary there is one campylo- 
tropous ovule inserted lateraly on the wall of the ovary. The ovule has 
two integuments, the outer of which surrounds the inner one but par- 
tially. . 
This is shown clearly in fig. 2,; in later stages with a full-grown em- 
bryosac, the situation remains the same. The but partial inclusion of 
the inner integument in the outer one is of very frequent occurrence 
among Graminaceae, it was found, for instance, in the case of Triticum 
