. Comparative anatomy of the vegetative organs of the phanerogams and ferns. Plant anatomy; Phanerogams; Ferns. j2Z SECONDARl' CHAXGES. arrangement of the secondary elements often continues to be maintained here, or is at least recognisable; hence, in every radial row derived from the cambium, one or more sieve-tubes always alternate more or less regularly with parenchyma. This arrangement appears with quite diagrammatic regularity in the bast of the Cupressine^ and many Taxinece^ The transverse section of the bast (Fig. 211) here shows regular rows, both in the radial and tangential direction
. Comparative anatomy of the vegetative organs of the phanerogams and ferns. Plant anatomy; Phanerogams; Ferns. j2Z SECONDARl' CHAXGES. arrangement of the secondary elements often continues to be maintained here, or is at least recognisable; hence, in every radial row derived from the cambium, one or more sieve-tubes always alternate more or less regularly with parenchyma. This arrangement appears with quite diagrammatic regularity in the bast of the Cupressine^ and many Taxinece^ The transverse section of the bast (Fig. 211) here shows regular rows, both in the radial and tangential direction. Every fourth tangential row consists of fibres; of the three which lie between two fibrous rows, the middle one is parenchymatous, while the outer and inner each form an inter- rupted layer of sieve-tubes. The parenchymatous cells are approximately similar in width to the sieve-tubes (Juniperus communis), or are wider { Thuja occidentalis). In the stem of species of Pinus (P. Strobus, nigricans, silvestris), and also of Abies pectinata, irregular tangential rows of wide parenchymatous cells alternate with. ra i^-. 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 Bary, A. de (Anton), 1831-1888; Bower, F. O. (Frederick Orpen), 1855-1948; Scott, Dukinfield Henry, 1854-1934. Oxford : Clarendon Press
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Keywords: ., bookcentury1800, bookdecad, booksubjectplantanatomy, bookyear1884
