A REVISION OF THE OLD WORLD SPECIES OF VELLOZIA 275 



that of the underlying cells. The cells beneath these outgrowths 

 are very rich in cell-contents, and strands from the vascular bundles 

 may be traced to them, indicating that there is special activity in 

 this region. The ultimate form of the outgrowth varies considerably 

 and appears to be constant for the different species. 



In several species the papilla grows into a relatively long, thin, 

 tapering process, resembling a hair. The central axis consists of one 



Fig. 3. — Longitudinal section through stellate hairs on surface of 

 ovary of V. suaveolens (highly magnified). 



Fig. 4. 



-Section through capitate glands on surface of ovary of V. viscosa 

 (highly magnified). 



layer or more of hypodermal cells, long and narrow in shape and with 

 few cell-contents, surrounded by a layer of elongated epidermal cells. 

 When young the epidermis is continuous round the apex, but as 

 growth proceeds the apical cell breaks and the outgrowth splits 

 longitudinally into two or more strands, according to the number of 

 rows of cells of which it is composed (fig. 1). Such outgrowths are 



u~2 



