. The British Charophyta. Characeae -- Great Britain. FIG. 10.—Cortex of Chara aculeolata (after Hill), i. Longitudinal section of an upper and a lower cortical series at an early stage, showing development of spine-cells, ii. Longitudinal section of mature cortex-node, iii. Transverse section of the same, a, nodal- cells ; I, internodal-cells; c, spine-cells; d, head-cells; e, lower stipulode. The shading in ii and iii indicates the presence of starch. shape, ranging from minute almost spherical or very shortly-conical processes to thin sharp spines several times as long as the diameter of th

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. The British Charophyta. Characeae -- Great Britain. FIG. 10.—Cortex of Chara aculeolata (after Hill), i. Longitudinal section of an upper and a lower cortical series at an early stage, showing development of spine-cells, ii. Longitudinal section of mature cortex-node, iii. Transverse section of the same, a, nodal- cells ; I, internodal-cells; c, spine-cells; d, head-cells; e, lower stipulode. The shading in ii and iii indicates the presence of starch. shape, ranging from minute almost spherical or very shortly-conical processes to thin sharp spines several times as long as the diameter of the stem. They are usually deciduous and therefore absent on the older parts of the stem. The spine-cells nearer the stem-nodes are often more developed than those towards the middle of the. 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 work.. Groves, James; Bullock-Webster, George Russell, b. 1858. London, The Ray society