. Plants and their ways in South Africa. Botany; Botany. 72 Plants and their Ways in South Africa To the outside of the xylem other cells of the bundle will take the same stain as did those of the endodermis ; they also contain starch and are in the part of the bundle called phloem or bast. In this region sieve tubes occur. With a lens they r;-C. Fig. 71.âStem of Helnnilhus (sunflower), cross section. Drawn by Miss Averil Bottouiley. E, Epidermis with hair (A), the outer thickened walls lorm \.\Mt cnliLle. C, Cortex. The outer cells with thickened angles form (â i>//(V/i-/i_)';Ka. A resin g
. Plants and their ways in South Africa. Botany; Botany. 72 Plants and their Ways in South Africa To the outside of the xylem other cells of the bundle will take the same stain as did those of the endodermis ; they also contain starch and are in the part of the bundle called phloem or bast. In this region sieve tubes occur. With a lens they r;-C. Fig. 71.âStem of Helnnilhus (sunflower), cross section. Drawn by Miss Averil Bottouiley. E, Epidermis with hair (A), the outer thickened walls lorm \.\Mt cnliLle. C, Cortex. The outer cells with thickened angles form (â i>//(V/i-/i_)';Ka. A resin gland (r) may be seen in the parenchyma. The innermost layer (f), the endi'dennis or starch sheath, contains starch. S, S/cle or central cylinder con- taining one fibro-vascular bundle. (Pc), pericyck: it forms a cluster of scleren- chymatous cells just outside each bundle. Between these cells and the bundle cambium (A) (fascicular cambium) lies the/;^/t>(V;?. The portion of the bundle inside the cambium is the vvteni. It contains rows of large thick-walled wood vessels, [m) Medulla or pith. (r/() Interfascicular cambium. can be made out by their larger size. Iodine stains their con- tents, and those of neighbouring cells, yellow brown. Within the ring of bundles, the ground tissue making up the greater portion of the stem is known as the medulla or pith, and between the bundles the medullary rays extend out to the cortex. They carry material from the wood out to the cortex. 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 Stoneman, Bertha. London, New York, Longmans, Green
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1915
