. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . Fig. 369. Willow. A upper epidermis of leaf. B lower epidermis with hairs and stomata. X160. (MOELLER.) are thin-Vvalled, while those of full-grown leaves often have walls so stronglythickened as to obliterate the cavities. The marginal teeth end in multi-cellular glands. The Mesophyl contains numerous oxalate rosettes and also simplecrystals. Willow leaves, according to the English consul Medhurst, are collectedin China in great quantities, prepared like tea, and mixed
. The microscopy of vegetable foods, with special reference to the detection of adulteration and the diagnosis of mixtures . Fig. 369. Willow. A upper epidermis of leaf. B lower epidermis with hairs and stomata. X160. (MOELLER.) are thin-Vvalled, while those of full-grown leaves often have walls so stronglythickened as to obliterate the cavities. The marginal teeth end in multi-cellular glands. The Mesophyl contains numerous oxalate rosettes and also simplecrystals. Willow leaves, according to the English consul Medhurst, are collectedin China in great quantities, prepared like tea, and mixed with this productto the extent of 20 per cent. (Sec Bibliography of Tea, p. 458.) This leaf can usually be distinguished from tea by its venation. Thecharacteristic microscopic elements arc the thin-walled hairs and thefour-celled stomata. The crystal rosettes of both leaves are similar,but simple crystals are not found in tea. ASH LEAVES. The leaflets of the odd-pinnate leaves of tlic asli (Fraxinus sj)., orderOleacetB), are similar to tea leaves in general outline, although ihey ;ircoften broader and more sharply too
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Keywords: ., bookcentury1900, bookdecade1910, bookpub, booksubjectplantanatomy
