. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 134 PUCCINIA 6. Puccinia Absinthii DC. Trichohads Artemisiae Berk. ; Cooke, Micr. Fung. p. 223. Puccinia Discoidearum Link ; Cooke, Micr. Fung. p. 206. P. TaTiaceti Plowr. Ured. p. 189 Saoc. Syll. vii. 637 P. Absinthii DC. Flor. fr. vi. 56. Sydow, Monogr. i. 11. Fischer, Ured. Schweiz, p. 188, f. 148. Uredospores. Sori generally hypophyllous, on yellowish- brown or indeterminate spots, scattered or aggregated, not confluent, minute, roundish, pulverulent, pale-brown; spores globose to ovoid, echinulat
. The British rust fungi (Uredinales) their biology and classification. Rust fungi. 134 PUCCINIA 6. Puccinia Absinthii DC. Trichohads Artemisiae Berk. ; Cooke, Micr. Fung. p. 223. Puccinia Discoidearum Link ; Cooke, Micr. Fung. p. 206. P. TaTiaceti Plowr. Ured. p. 189 Saoc. Syll. vii. 637 P. Absinthii DC. Flor. fr. vi. 56. Sydow, Monogr. i. 11. Fischer, Ured. Schweiz, p. 188, f. 148. Uredospores. Sori generally hypophyllous, on yellowish- brown or indeterminate spots, scattered or aggregated, not confluent, minute, roundish, pulverulent, pale-brown; spores globose to ovoid, echinulate, pale yellowish-brown, 20—35 x 15—26 /i, mostly with three subequatorial germ-pores. Teleutospores. Sori amphigenous, but generally on the lower surface or sometimes on the stems, similar to the uredo-sori but occasionally confluent, soon naked, dark-brown or blackish; spores oblong to oblong-clavate, rounded and thick- ened (3—7 n) above, constricted, slightly attenuated below, the upper cell punctate or verruculose, the lower frequently smooth, especially at the base, brown, 38—62 x 20— 27 /J.; pedicels hyaline, thick, persis- tent, as much as 80 fi On Artemisia Absinthium, A. maritima, A. vulgaris. July—Sep- tember. Rather uncommon. Also recorded in Switzerland on A. campestris. (Fig. 86.) Fig. 86. P. Absinthii. Teleu tospores, on A. Absinthium. The germ-pores of both kinds of spores are covered with paler, swollen caps. P. Tanaaeti, which was formerly united with this species, possesses on the average narrower and shorter teleutospores, though in each these spores are said to be marked in a similar way, chiefly in the upper half. But the markings of P. Absinthii are stronger and less likely to escape observation, especially on the pore-caps of both cells. Distribution : Europe, Siberia, Japan, North America. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appeara
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