. The algae. Algae. Fig. 136 Gigartina. Left, plant of G. californica; (original, x \). Centre, carpogonial branch, G. stellata ( x 1500); cp. = carpogon- ium; = vegetative lateral; = support cell. Right, thallus, G. stellata (x 160); a = outer cells; b = inner cells (both after Newton). plants have papillose projections (the cystocarps) from the surface of the thallus. The internal construction consists of a mass of large central cells with smaller cells towards the periphery. The limiting layer consists of very small cells, the whole being based upon the multiaxial type of con
. The algae. Algae. Fig. 136 Gigartina. Left, plant of G. californica; (original, x \). Centre, carpogonial branch, G. stellata ( x 1500); cp. = carpogon- ium; = vegetative lateral; = support cell. Right, thallus, G. stellata (x 160); a = outer cells; b = inner cells (both after Newton). plants have papillose projections (the cystocarps) from the surface of the thallus. The internal construction consists of a mass of large central cells with smaller cells towards the periphery. The limiting layer consists of very small cells, the whole being based upon the multiaxial type of construction. In some species, G. stellata, the cells of inner cortex and medulla give rise to down-growing septate hyphae. The carpogonial branch is three-celled and is de- rived from a large support cell of the inner cortex, which also fimctions as the auxiliary cell. In addition to the carpogonial branch the support cell either produces a vegetative lateral or a second carpogonial branch. Phyllophoraceae : Phyllophora (phyllo, leaf; phora, bear). Figs. The stipitate fronds expand upwards into a rigid or membranous flat lamina which is either simple or divided, whilst proliferations may also arise from the margin or basal disc. Morphologically the thallus is multiaxial and composed of oblong polygonal cells in the central medullary region, whilst the outer cortical layers consist of minute, vertically seriate, assimilatory cells. In some species 243. 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 Chapman, V. J. (Valentine Jackson), 1910-. London, Macmillan; New York, St. Martin's Press
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Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, booksubjectalgae
