. American journal of pharmacy. The Anatomy of Edible Berries. 21 on the raphe side), but the seed freed from this coat is about thesame size as in the currant, although somewhat narrower and morenearly terete. Unlike the European gooseberry, the surface is freefrom prickles. Histology.—Pericarp (i) The Epicarp and (2) Hypoderm are practically the same as in the red currant. (3) Mesocarp.—This layer is composed of extraordinarily largecells (often 0-5 millimeter in diameter), which are evident to thenaked eye and are separated from each other by a network of cellshardly 005 millimeter in diame
. American journal of pharmacy. The Anatomy of Edible Berries. 21 on the raphe side), but the seed freed from this coat is about thesame size as in the currant, although somewhat narrower and morenearly terete. Unlike the European gooseberry, the surface is freefrom prickles. Histology.—Pericarp (i) The Epicarp and (2) Hypoderm are practically the same as in the red currant. (3) Mesocarp.—This layer is composed of extraordinarily largecells (often 0-5 millimeter in diameter), which are evident to thenaked eye and are separated from each other by a network of cellshardly 005 millimeter in diameter. In the inner layers the smallcells are less numerous or entirely lacking. Crystal clusters areabundant, particularly in the inner layers. (4) Endocarp.—The most striking histological distinction betweenthe currant and the gooseberry is in the structure of the endocarp,. Fig. 22.—American Gooseberry {Ribes oxyacanthoides). I Whole fruit, X Transverse section of fruit with seeds, X i. Ill Seeds deprived of gela-tinous coat, X 8. which in the currant is a dense sclerenchymatous tissue, in thegooseberry a layer of parenchyma cells with walls so thin that theyare studied with difficulty. This remarkable difference in structureof two fruits of the same genus led the writer to examine the fruitof R. aureuni, the only other species of this genus available forstudy. In this fruit, which resembles more the black currant thanthe gooseberry, the endocarp cells, although apparently parenchy-matous, had thicker walls than those of the latter, and the cells werearranged in a manner similar to those of the sclerenchymatizedendocarp of the currant. A study of this coat in other species, andin all stages of development, would doubtless disclose other inter,mediate forms. lesta, Endospertn, and Embryo.—The microscopic structure of theseed is practically the saamericanjournal77phil
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Keywords: ., bookcentury1800, bookdecade182, booksubjectpharmacy, bookyear1829
