. A manual of botany. Botany. 374 MANUAL OP BOTANY remain fused in front and behind them, giving the appearance of an internal and external shoath {fig. 151, b). In some cases the inner endodermis is almost or entirely indistinguishable, when the structure simulates a monostele. The separate bundles of the Equisetums are peculiar in having a large lacunar space Fie. Fig. 761. Gamoatelic stem of Marsilea. cp. Epiclerniis. Cortical laounie. scl. Solerenchyma in tlie cortex. e«,. Outer; en^. inner fused eudodermls of the steles. The steles are fused together laterally, forming a Tasc
. A manual of botany. Botany. 374 MANUAL OP BOTANY remain fused in front and behind them, giving the appearance of an internal and external shoath {fig. 151, b). In some cases the inner endodermis is almost or entirely indistinguishable, when the structure simulates a monostele. The separate bundles of the Equisetums are peculiar in having a large lacunar space Fie. Fig. 761. Gamoatelic stem of Marsilea. cp. Epiclerniis. Cortical laounie. scl. Solerenchyma in tlie cortex. e«,. Outer; en^. inner fused eudodermls of the steles. The steles are fused together laterally, forming a TascuL^r ring in the centre of the stem surrounding a small portion of the ground tissue. ' in the region of the xylem, causing the latter to be represented by only a few vascular elements (fig. 758). The bundles in schizostelic stems are always collateral. Polystelic Stems.— In these as in the last described type the first-formed stem is monostehc, but as it grows the differentia- tion of the tissue of the pleronie becomes irregular, giving rise to several steles separated by conjunctive tissue (fig. 760). Each. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Green, J. Reynolds (Joseph Reynolds), 1848-1914. London, J. & A. Churchill
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