American journal of pharmacy . ristic. The long cellsare arranged in groups, each group consisting of five to fifteen cellsside by side. The cells of adjoining groups may extend either inthe same or different directions. Often the end walls of one groupadjoin the side wall of the outer cell of another group. Curiouscrinoid like forms result from the junction of several groups. As a Am. Jour. , 1904. Anatomy of Edible Berries. 541 rule the lumen is much narrower than the walls and oftentimes isreduced to a mere line. Numerous pores connect adjoining cellsand some pierce the walls
American journal of pharmacy . ristic. The long cellsare arranged in groups, each group consisting of five to fifteen cellsside by side. The cells of adjoining groups may extend either inthe same or different directions. Often the end walls of one groupadjoin the side wall of the outer cell of another group. Curiouscrinoid like forms result from the junction of several groups. As a Am. Jour. , 1904. Anatomy of Edible Berries. 541 rule the lumen is much narrower than the walls and oftentimes isreduced to a mere line. Numerous pores connect adjoining cellsand some pierce the walls separating these cells from the cells range in length up to 05 millimeter; the thickness of thedouble walls is from 0005 to 002 millimeter. Testa {Fig. 18, S).—(i) Mucilage Cells {Fig. 18, aep).—The outerlayer of the testa consists of large but cells filled withgelatinous matter. These cells are about 0-09 millimeter in tangen-tial diameter, but often have a radial diameter of over 0-5 Fig. 17.—Red currant endocarp in surface view. X 160. On the outer surface they are usually convex. Owing to the greatsize of the cells, this coat, although but a single cell-layer thick,forms a considerable part of the bulk of the seed. (2) Parenchyma {Fig. 18, p).—Beneath the mucilage cells areseveral layers of more or less flattened parenchymatous cells withintercellular spaces. The inner layers are smaller than the outerand more strongly flattened. (3) Crystal Layer {Figs. 18 and 20 k).—In surface view the deepbrown thick-walled cells of this layer are sharply polygonal withdiameters from o-oo8 to 0-020 millimeter. The middle lamella is 542 Anatomy of Edible Berries. Am. Jour. 1904. colorless, the thick membrane, brown. Each cell contains a singlemonoclinic crystal, which nearly or completely fills the cell cavity. With crossed Nicol prisms these crystals appear as luminous spotsin the black background, disappearing on addition
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