HESPERIDIN. 143 
crystalline exudations (Manna), which contain as much as 
eighty per cent of a sweet principle, mannite C,H,(OH).. 
The glucoside hesperidin’ is contained in unripe fruits of 
the Aurantiex, dissolved in the cell-sap, especially in the various 
Species of Citrus (very abundantly in Fructus Aurantii imma- 
Fie. 63.—Transverse section through the marginal portion of a leaf of Aloé socotrina. 
-ep, epidermis (c, cuticle); sp, stoma; a, respiratory cavity; p and g, assimilating tissue; cr, 
crystal cells (with raphides); a, cells containing aloes (the large ones contain chromo- 
en); gfb, vascular bundle; m, medulla containing mucilage. 
turi). By immersing the fruits in alcohol, there are produced in 
the cells sphero-crystals, similar to those of inulin (Fig. 54), 
1 Pfeffer, Botan, Zeit., 1874, p. 481. Tiemann and Will, “Ber. d. 
Deutsch. Chem. Ges.,” 1881, 946. Virgil named the Seville oranges the 
apples of Hesperides, the daughters of night in Grecian mythology. 
