OIL-CELLS, 243 
Nevertheless the latex-tubes should be treated of in this place.. 
Oil-cells. Volatile oil, in roundish or oval cells,' is found in 
cloves (as much as 20 per cent), in cudebs (as much as 13 per 
cent), in mace (up to 17 per cent, Figs. 85, 159, 160),’ in the 
leaves and barks of the Lauraceex * (Cinnamomum, Camphora, 
Fig. 161), and in the rhizomes of the Zingiberacee (Fig. 125) * 
and of Acorus Calamus (Fig. 151 a). Volatile oil, mixed with 
Fic. 161.—Transverse section through a sub-epidermal oil-cell in the surrounding _— 
from a leaf of Cinnamomum Camphora; ep, epidermis (e, cuticle; cs, cuticle layer; cl, 
cellulose layer), p, palisade tissue; 62, oil-cell; 4, drops of oil (Tschireh). 
tubes are frequently connected anatomically with other conducting 
organs, especially with sieve-tubes, as, for instance, in Rad. Taraxact 
(Figs. 164 and 165). : ee 
' All the cells dispersed through the fundamental tissue, and differing 
in shape or contents (stune-cells, oil-, resin-, mucilage-cells, ico aoe 
ete.), are also designated in general by the name of idioblasts ( fee 
idvos peculiar, Glacros, germ, organic structure). Heinicher (Ber. d. 
Deutsch. bot. Ges., ii.) has also recently found in the Papaveracez 
idioblasts containing albumen. ise : 
* These examples aay also be regarded at the same time as the max!~ 
mum amounts of volatile oil contained in plants. 
3 Berg’s “ Atlas,” Plate xxxvi., Fig. 86. 
4 Tbid., Plate xix, 
