. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. Fig. 27. P. Poarum. An recidio- spore germinating on leaf of Poa annua. x Fig. 26. P. Poarum. Vertical section through edge of aecidium; showing a, the crushed cells of the upper myce- lium, pushed on one side ; b, the chain of peridium-cells; c, the spore bed, giving rise to d, the chains of a?cidio- spores. x 600. The black dots are the nucleoli; one aecidiospore-inother- cell has three nuclei. case in most of the higher forms of the Uredinales, arises deep Fig. 28. p. Poarum.
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. Fig. 27. P. Poarum. An recidio- spore germinating on leaf of Poa annua. x Fig. 26. P. Poarum. Vertical section through edge of aecidium; showing a, the crushed cells of the upper myce- lium, pushed on one side ; b, the chain of peridium-cells; c, the spore bed, giving rise to d, the chains of a?cidio- spores. x 600. The black dots are the nucleoli; one aecidiospore-inother- cell has three nuclei. case in most of the higher forms of the Uredinales, arises deep Fig. 28. p. Poarum. spore germinating in water, m the leaf, and the densely x 250; b, the same, showing packed knot of hyphse which the germ-pores, x500. forms the starting-point of the hymenium, where the cells are full of protoplasm, is covered over by a number of nearly empty cells which are ultimately squeezed to the side by the develop- ing aecidium and are shown in the figure at a. It is easy to produce the teleutospores in a garden on a tuft of (say) Poa annua or P. pratensis, by planting quite near to it. 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 Grove, W. B. (William Bywater), 1848-1938. Cambridge, University Press
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishercambr, bookyear1913
