. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. XENODOCHUS 303 Arthur records and names another species, X. minor, on Sanguisorba latifolia, from Alaska. Xenodochus carbonarius Schlecht. Xenodochus carhonariv& Schlecht. in Linnsea, i. 237. pi. 3, f. 3. Cooke, Handb. p. 489 ; Micr. Fung. p. 201, pi. 3, f. 29. Plowr. Ured. p. 227. Sacc. Syll. vii. 751. Phraymidium carbonarium Wint. Pilze, p. 227. Fischer, Ured. Schweiz, p. 406, f. 284. Sydow, Monogr. iii. 157, f. 67. ^Ecidiospofes. Cseomata hypophyllous, on coloured spots, elongated, large
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. XENODOCHUS 303 Arthur records and names another species, X. minor, on Sanguisorba latifolia, from Alaska. Xenodochus carbonarius Schlecht. Xenodochus carhonariv& Schlecht. in Linnsea, i. 237. pi. 3, f. 3. Cooke, Handb. p. 489 ; Micr. Fung. p. 201, pi. 3, f. 29. Plowr. Ured. p. 227. Sacc. Syll. vii. 751. Phraymidium carbonarium Wint. Pilze, p. 227. Fischer, Ured. Schweiz, p. 406, f. 284. Sydow, Monogr. iii. 157, f. 67. ^Ecidiospofes. Cseomata hypophyllous, on coloured spots, elongated, large, erumpent and pul- verulent on the nerves, petioles and stems, roundish and scattered on the leaves, bright orange-red or vermilion; spores roundish to oblong, verruculose, orange, 18—24 /x, in short chains. Teleutos'pores. Sori amphigenous, often confluent with the cseomata, roundish, soon naked, thick, large, pulvinate, black; spores elongated- cylindrical, often curved, of 4—22 cells, rounded at both ends, strongly constricted, smooth, dark-brown, 200— 300 x 24—28 fi; each cell with two opposite germ-pores at the upper margin, except the uppermost which has one apical germ-pore; pedicels very short, persistent. The whole chain is surrounded by a distinct sub- hyaline membrane, which swells up considerably in lactic acid. On Sanguisorba officinalis. Not uncommon. June—Oc- tober. (Fig. 229.) The teleutospore-cells of the Burnet Chain Rust mature from above downwards, the upper ones being darkest and the lower ones often colourless. There are no uredospores ; perhaps they are represented by secondary secidiospoies. The distinctions of this species from the other Phragmidieaj are quite sufficient to justify its generic separation. Winter assigns to the cseomata clavate paraphyses which I cannot find. Distribution : Europe, Fig. 229. A', carbonarius. Teleutospore x 360; upper part of same, x Please note that these images are extracted from scanned page ima
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