. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. The presence of the mycelium causes the stems to stand more upright; the internodes are considerably lengthened, and the leaves fewer, so that the affected plants can be readily distinguished, as in P. Betonicae. The mycelium appears to be perennial, and the sori to be confined almost entirely to the stems, where they cause a slight thickening and are more frequent at the nodes than elsewhere. Distribution : Central and North-western Europe. Fig. 122. P. cauUncola. Teleutospores and mesospore.
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. The presence of the mycelium causes the stems to stand more upright; the internodes are considerably lengthened, and the leaves fewer, so that the affected plants can be readily distinguished, as in P. Betonicae. The mycelium appears to be perennial, and the sori to be confined almost entirely to the stems, where they cause a slight thickening and are more frequent at the nodes than elsewhere. Distribution : Central and North-western Europe. Fig. 122. P. cauUncola. Teleutospores and mesospore. 45. Puccinia Glechomatis DC. P. Glechomatis DC. Encycl. viii. 245. Cooke, Handb. p. 496 ; Micr. Fung. p. 204, pi. 4, f. 73—4. Plowr. Ured. p. 214. Sacc. Syll. vii. 688. Sydow, Monogr. i. 277. Fischer, Ured. Schweiz, p. 327, f. 239. Teleutospores. Sori hypophyllous or on the petioles, on brownish spots or sometimes none, h—1 mm. diam., roundish, solitary and scattered, or more often subcon- fluent into rounded clusters as much as 4 mm. diam., on the stem and petioles often elongated, pulvinate, at first yellowish, then chestnut, and at last blackish; spores ellipsoid or oblong, with an acute or rounded horn-like process (8—12^ high) which is often obliquely placed and falls off on germination, faintly constricted, rounded below, smooth, pale and clear-brown, 30—48x15—24/x ; pedicels hyaline, persistent, as much as 75fi long; an occasional mesospore is Fig. 123. P. Glechomatis. Teleutospores and 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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