r PLATE XV. 



Pig, 1, Hlmantophyll-um miniafum Groenl, Cells of the epidennis of thd 

 ovary with elaioplasts in process of degeneration, 



" 2, Hibiscus liliiflorus Cav, Epidermal cells of the ovairy each of 

 which contains an elaioplast close to the cell nucleus. 



" 3o OncidiTma s-phacelatum Lindl, Epidermal cells of the ovary con- 

 taining elaioplasts in advanced develofnient . Each of them is 

 fragmented, and thus we have several elaioplasts in each cell, 



" h. Epidermal cells of the ovary of Brassia hrachiata Iiindl, with 

 elaioplasts of granulose appearance* 



" 5,6 ♦ Cymbidiu m Lowianum Eeichb, Epidermal cells of the ovary (fig, 5) 

 and of the perianth (fig, 6), In the first the nucleus remains 

 completely covered by the elaioplast which is stained»black, 

 after brief treatment of the sections with osmic acid 1 per cent, 



'/- IJote ; — Figures U-, 6, 7, 8, 9 of Plate XIII were drawn with No. 3 

 ocular and oil immersion objective l/2 Zeiss; all the others were drawn with 

 Kb, 9 objective, and No, ^ Kbristka ocular. 



« 

 March, I923, Translated by H. B. Humphrey. 



