. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 124 I-ROMY* ES The coiiiR'ction of the two tonus, lii si proA ed bj Fuckel and Plowright, lias been confirmed by Fischer. n the continent and elsewhere, there are forms of Uromyces on other species of Juncus, some of which (and possibly mosl of them have their aecidia on other hosts than /'. dysenterica. Distribution: Central and Western Europe, Algeria, North and South America. 36. Uromyces Scirpi Burr. jEcidium Glaucis D. et M. ; Cooke, Grevillea, xv. 29. Plowr. I'red. p. 268 ; Gard. ('hron.
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 124 I-ROMY* ES The coiiiR'ction of the two tonus, lii si proA ed bj Fuckel and Plowright, lias been confirmed by Fischer. n the continent and elsewhere, there are forms of Uromyces on other species of Juncus, some of which (and possibly mosl of them have their aecidia on other hosts than /'. dysenterica. Distribution: Central and Western Europe, Algeria, North and South America. 36. Uromyces Scirpi Burr. jEcidium Glaucis D. et M. ; Cooke, Grevillea, xv. 29. Plowr. I'red. p. 268 ; Gard. ('hron. ser. 3, vii. 682, 7 16. Uredo Scirpi Cast. Catal. PI. Marseille, p. 214. Uromyces Scirpi Burr. Parasit. Fung. Illinois, p. L68. Sacc. Syll. vii. 558. Sydow, Monogr. ii. 302. U. lineolatus Desni. ; Plowr. Grevillea, xxi. 111. U. maritimae Plowr. Gard. Chron. ser. 3, vii. 682, 746 ; Jour. Roy. Hort. Soc. (1890), p. cix. Klehahn, Wirtswechs. Rostpilze, p. 328. Nigredo Scirpi Arthur, X. Amer. Fl. vii. 233. Spermogones. Usually epiphyllous. JEcidiospores. ^Ecidia hypophyllous or on the petioles, in rather small clusters, cup-shaped, with an incised re volute margin; spores densely and minutely verruculose, transparent- yellowish, 16—24 x 14—20/u. Uredospores. Sori hypophyllous, scattered or arranged in lines, rounded or oblong, up to 1 mm. long, surrounded by the cleft epidermis, pulverulent, cinnamon; spores globose to ovate, distantly and minutely echinulate, yellowish-brown, 22—35 x 16—25 /x ; epispore 1^—2 /x thick, with three equatorial germ-pores. Teleutospores. Sori amphigenous, on in- definite discoloured spots, scattered or confluent in lines, long covered by the epidermis, brownish- black; spores oblong to clavate, tapering usually and thickened (up to 12 /*) above, attenuated below, smooth, pale-brown, 26—45 x 15—24 fx ; pedicels brownish, persistent, as long as or longer than the I'.Scirpi Teleutospores, on S. duviatilis. Illinois, P
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