. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . ad. Most of them have thin walls ( to 11) of nearly uniformthickness (//); but some of the longer forn^s have thick walls and a narrowlumen resembling the strawberry hair (//). The thin-walled hairs arecommonly sinuous. 2. Ilypoderm (Fig. 262, //y). Two or more cell layers of collen- RED RASPBERRY. 351 chyma form the hypodcrm, a water tissue serving to retard the evapora-tion of the fruit juice. 3. Mesocarp (Fig. 262, Mes). The outer two or three layers of themeso
. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . ad. Most of them have thin walls ( to 11) of nearly uniformthickness (//); but some of the longer forn^s have thick walls and a narrowlumen resembling the strawberry hair (//). The thin-walled hairs arecommonly sinuous. 2. Ilypoderm (Fig. 262, //y). Two or more cell layers of collen- RED RASPBERRY. 351 chyma form the hypodcrm, a water tissue serving to retard the evapora-tion of the fruit juice. 3. Mesocarp (Fig. 262, Mes). The outer two or three layers of themesocarp consist of isodiametric cells with intercellular spaces, inter-spersed with crystal cells; but further inward, at least in the thickerportion of the fruit, the cells arc enormously elongated in radial directionsand are without intercellular spaces. Tschierske points out that thesucculent nature of the fruit results from the radial growth of cells, notas in the strawberry from the formation of numerous isodiametric cells bya meristematic layer. As in all the species of Ruhus, cells with crystal clusters are common,. sto.^ Fig. 263. Red Raspberry. Epicarp with h straight hair, h sinuous hairs, and sto stoma. X160. (WiNTON.) particularly near the base of the style. Reticulated cells occur in theinner layers adjoining the endocarp. 4. Outer Endocarp (Fig 262, F; Fig. 264, //). Owing to the deepwrinkles, the thickness of this coat is exceedingly variable. As in thestrawberr}^ the sclerenchyma fibers are longitudinally arranged andcross those of the inner endocarp at right angles. The fibers are alittle narrower than in the latter fruit and in cross sections are usuallyelliptical polygonal, with the longer diameters in radial directions. 5. Inner Endocarp (Fig. 262, F; Fig. 264, qj). The fibers of this coat,of which there are four or more thicknesses, are the same as in the outerendocarp, but run transversely about the fruit. Spermoderm (Fig. 264, S). The seed coats of the bramb
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Keywords: ., bookcentury1900, bookdecade1910, bookpub, booksubjectplantanatomy
