. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 130 PUCCINIA pale clear-brown, 45—60 x 20—25 fi; pedicels brownish, persis- tent, thick, about as long as the spore or longer; no mesospores were seen, but some irregular spores. On Aster Tripolium. New Pitsligo, 1870 (Herb. Berk.); Wolferton Beach, King's Ljmn, July—November, 1873 (Plow- right). (Fig. 80.) The greyish tinge mentioned by Plowright seems to be due to germ- tubes issuing from the spores of this Leptopuocinia. This species is decidedly diflferent from the American forms with which it is united by
. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 130 PUCCINIA pale clear-brown, 45—60 x 20—25 fi; pedicels brownish, persis- tent, thick, about as long as the spore or longer; no mesospores were seen, but some irregular spores. On Aster Tripolium. New Pitsligo, 1870 (Herb. Berk.); Wolferton Beach, King's Ljmn, July—November, 1873 (Plow- right). (Fig. 80.) The greyish tinge mentioned by Plowright seems to be due to germ- tubes issuing from the spores of this Leptopuocinia. This species is decidedly diflferent from the American forms with which it is united by Sydow ; there are no spots, the colour of the spore is paler, the apex not so much thickened, and the sori are not confined to the lower leaf-surface. Many spores were observed bifid at the summit, but not owing to germi- nation, which had not taken place in them. Distribution : Northern and Central Europe, Siberia. 2. Puccinia Virgaurese Lib. Xyloma Virgaureae DC. Flor. fr. vi. 158. Puooinia Virgaureae Lib. Crypt. Arduen. iv. No, 393. Cooke, Handb. p. 500 ; Micr. Fung. p. 206. Plowr. Ured. p. 203. Sacc. Syll. vii. 679. Sydow, Monogr. i. 151. Fischer, Ured. Schweiz, p. 363, i. 264. Teleutospores. Sori hypophyllous, minute, crowded in stellate or dendritic clusters, on round, yellowish, purple-centred spots, com- pact, shining, black ; spores oblong, clavate or fusoid, above rounded, attenuated or truncate, very much thickened (as much as 12/i) and darker or with a paler hood-like cap, hardly constricted, tapering below, smooth, yellow-brown, paler down- wards, 30—56x12—20 ytt; pedicels somewhat hyaline, half as long as the spore. On Solidago Virgaurea. August and September. Un- common ; Surrey, etc. (Fig. 81.) The sori are arranged in a radiating fashion; they are sui-rounded each by a thick fence of dark-brown paraphyses, remain long covered by. Fig. 81. P. Virgaureae. Please note that these images are extracted from scanned page images that may have
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