CANNABIS SATIVA 



XI9 



white, spherical, papillate pollen grains are liberated through 

 terminal pores. 



The oval sepals are acuminate, the outer surface and margins 

 being covered with multicellular glands and slender, pointed, 

 unicellular hairs with crystals of calcium oxalate deposited in 

 their swollen bases. The inner epidermis is practically devoid 

 of hairs and stomata which are present in the outer epidermis. 

 Except in the region of the median vein, the mesophyll is spongy 



Fig. 104. A, diagrammatic representation of staminate inflorescence; B, diagram of 

 branch of staminate inflorescence showing three flowers ; C, habit of staminate flower ; D, 

 face view of young flower, showing arrangement of parts ; E, F, and G, successive stages in 

 development of staminate flower. The numerals indicate the sequence of origin of sepals : 

 fl ax, floral axis ; ped, pedicel ; se, sepal ; sta, stamen ; stp, stipule. (Redrawn and adapted 

 from Briosi and Tognini, Istituto Botanico di Pavia.^ 



and one to two cells in thickness; but at the margins, mesophyll 

 is lacking and the sepal consists of only the epidermal layers. As 

 the sepal matures, the inner epidermis becomes much stretched and 

 crushed. 



In the ontogeny of the staminate flower, the conical floral 

 primordium which commonly develops in the axil of a stipule first 

 produces the five cone-shaped initials of the sepals. These arise 

 in a definite succession; the first two are adjacent to the stipule, 

 the third one develops opposite to the stipule, and is followed by 

 two laterally placed ones. (Fig. 104, E, F, G.) After the differ- 



