. Botany for secondary schools; a guide to the knowledge of the vegetation of the neighborhood. Plants. off at these places, and the rough corky spots are called lenticels. Phellogen is very active in the cork oak of Spain, but it occurs in nearly all woody plants. In such plants as button- wood (sycamore), in which the bark peels off in thin, flat layers, the phellogen layer is nearly uniformly active in all parts, while in many other cases there is very little uni- formity. In wahoo (burning-bush) it is in four bands, giv- ing rise to four corner wings. In the section of menisper- mum alread
. Botany for secondary schools; a guide to the knowledge of the vegetation of the neighborhood. Plants. off at these places, and the rough corky spots are called lenticels. Phellogen is very active in the cork oak of Spain, but it occurs in nearly all woody plants. In such plants as button- wood (sycamore), in which the bark peels off in thin, flat layers, the phellogen layer is nearly uniformly active in all parts, while in many other cases there is very little uni- formity. In wahoo (burning-bush) it is in four bands, giv- ing rise to four corner wings. In the section of menisper- mum already studied, it is found only under the lenticel spots where the stomates have been located. Fig. 465 shows structure of the outer bark as it occurs in the whole circum- ference of the three-year-old stem of red currant. 499. To study phellogen and corky tissue: Cut thin cross- 465. Cross-section of red cur- rant twig, showing bark. c, corky tissue; p, phellogen; g, parenchyma or cortex. 466. White pine stem in radial longitudinal section. Tracheids on the left with medullary rays crossing them. Next to the wood is the phloem, then fundamental tissue, then the dark bark. sections of red currant from stems two or three years old that have been kept in alcohol at least several hours. The sections should be stained. With the highest power make a careful study of the phellogen and the corky tissue outside. 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 Bailey, L. H. (Liberty Hyde), 1858-1954. New York, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1913
