Embryo in Lilaea subulata , H. B. K. 1 3 
composed, for the most part, of two layers of cells and soon 
reaches to the top of the nucellus, and later closes over it to 
form the micropyle. The outer integument remains less 
developed than the inner one, and barely reaches to its level. 
The Style and Stigma. 
While there are some minor differences in the development 
of the style in the long- and short-styled flowers, the structure 
of the fully developed parts is essentially the same. At an 
early period in the growth of the flower, the free superficial 
cells of the upper margins of the carpel become enlarged into 
papillae (Fig. 25, which later reach a great size, and are 
distinguished also by very dense granular cytoplasm and large 
nuclei. When the pistil is mature, they form a dense tuft of 
conspicuous stigmatic hairs. 
The narrow canal, which is present in the very young style, 
soon becomes completely obliterated by the coalescence of 
the cells forming its walls. These cells, which are the con- 
tinuation of the epidermal cells which form the stigmatic 
papillae, much resemble the latter in the character of their 
contents, although the nuclei are smaller. There are, how- 
ever, transitional forms in the upper part of the style. 
Occasional indications of more than one nucleus in these 
cells were seen, but the matter was not further investigated. 
These cells together form a very distinct strand of con- 
ducting-tissue, which in cross-section is oval, and very clearly 
defined. 
The arrangement of the tissues in the style may be readily 
seen by comparing cross and longitudinal sections. The 
epidermis is composed of cells with a thickened outer wall, 
and within this are several layers of loose parenchyma. In 
the sections examined there were three vascular bundles, but 
whether this number is constant cannot now be stated. The 
bundles were of the usual collateral type with a few annular 
and spiral tracheids in the xylem. These bundles were 
separated from the central cylinder of conducting-tissue by 
