. The British rust fungi (Uredinales), their biology and classification. Uredineae. GYMNOSPORANGIUM 305 zEcidiospores. ^-Ecidia clustered on yellow or orange thick- ened spots on the leaves, fruits, and stems, cylindrical, up to. Fig. 230. G. clavariaeforme. ^Ecidia (Rrestelia) ou leaf, fruit and branch of Hawthorn (reduced) ; a, peridium x 16. The fruit and gall on branch are shown as they appear when the peridia are old and the mass looks some- what like a honey-comb. 2^ mm. high, fimbriate above, at length lacerate to base, brown ; spores verruculose, brownish, about 28—30 fi; 8—-10, scatte
. The British rust fungi (Uredinales), their biology and classification. Uredineae. GYMNOSPORANGIUM 305 zEcidiospores. ^-Ecidia clustered on yellow or orange thick- ened spots on the leaves, fruits, and stems, cylindrical, up to. Fig. 230. G. clavariaeforme. ^Ecidia (Rrestelia) ou leaf, fruit and branch of Hawthorn (reduced) ; a, peridium x 16. The fruit and gall on branch are shown as they appear when the peridia are old and the mass looks some- what like a honey-comb. 2^ mm. high, fimbriate above, at length lacerate to base, brown ; spores verruculose, brownish, about 28—30 fi; 8—-10, scattered. Teleutospores. Spores collect- ed in long, cylindrical, conical, ribbon-like or tongue-shaped masses about 1 cm. long, which are at first firm, then gelatinous, finally horny when dry, pale-orange, protruding from fusiform swellings of the branches; spores fusiform, varied much in length and breadth, from thick-walled, 50—60 x 15—21 /* to thin-walled, 100—120 x 10—12/z, rounded or attenuated above, hardly constricted, tapering gradu- ally below, smooth, dark yellowish or pale-brown; germ-pores two in each cell; pedicels hyaline, very long. pale- pores. 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, William Bywater. Cambridge, Univ. Press
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