. Plant studies; an elementary botany. Botany. 108 PLANT STUDIES e p p/ p e cesses of the lower groups that it is regarded as the only true root. It is quite uniform in sti'ucture, consisting of a tough and iibrous central axis surrounded by a region of more spongy structure. The tough axis is mostly made up of vessels, so called l)ec;iuse ihcy conduct nuiterial. and is called tlie vascular axis. The outer more sjHUigy region is the cortex, ivliich covers the vascular axis like a thick skin (see Fig. ). ass pears in the older parts of to the vascular axis to lie Conducted the root, and the
. Plant studies; an elementary botany. Botany. 108 PLANT STUDIES e p p/ p e cesses of the lower groups that it is regarded as the only true root. It is quite uniform in sti'ucture, consisting of a tough and iibrous central axis surrounded by a region of more spongy structure. The tough axis is mostly made up of vessels, so called l)ec;iuse ihcy conduct nuiterial. and is called tlie vascular axis. The outer more sjHUigy region is the cortex, ivliich covers the vascular axis like a thick skin (see Fig. ). ass pears in the older parts of to the vascular axis to lie Conducted the root, and the pronii- / . j. nent ir). '^" ^^^^ Stem. Another ])e('uliarity of the root is it elongales only hy growth at the tip. while the stem usually continues to elongate some distance hdiiiid its growing tiji. In the soil this delicate growing tiji is protected liy a little cap of cells, known as the rwi-cap (see Fig. 105).. Fig. A loiiyitudiii section through tile rtji tip of shepherd's purs eho\^â ing the central va cnlaraxisC;? ), snrroundt hy the cortex (/;), outsii of the cortex tlie e] dermis ie) which disaj. 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 Coulter, John Merle, 1851-1928. New York, D. Appleton and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1900
