492 



SCIENTIFIC AND APPLIED PHARMACOGNOSY 



Inner Structure. (Fig. 212.) An epidermal layer with thick, 

 cuticularized papillose walls; several layers of small, thin-walled, 

 more or less collapsed parenchyma cells; a single large brown elliptical 

 vitta or oil-canal between each of the primary ribs and surrounded 



En 



FIG. 212. Transverse sections of Umbelliferous fruits: A, frcniculum; B, carum; 

 C, anisum; D, conium; E, Apium graveolens; F, petroselinum. O, outer 

 epidermis of pericarp; H, non-glandular hairs; V, vittae or oil canals; F, 

 fibro vascular bundles; I, inner epidermis of pericarp; Sa, seed-coat; P, 

 parenchyma cells of middle layer or sarcocarp; En, endosperm. All of the 

 fruits, with the exception of conium show vittae or oil canals. Drawing by 

 Hogstad. 



by a layer of comparatively large, yellowish-brown, tangentially 

 elongated cells; a single fibrovascular bundle between each of the 



