. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ON 185 the petioles sometimes very large, scattered or confluent, roundish, pulverulent, blackish-brown; spores ellipsoid to ob- long, rounded above, not thickened, hardly constricted, rounded or gently attenuated below, smooth, brown, 30—50 x 15—23 /a; pedicels hyaline, thin, deciduous, about as long as the spore. On Apiam graveolens. Not common. iEcidia in May and June; teleutospores September—November. Distinguished from many of its close allies by the possession of an aecidium.
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. ON 185 the petioles sometimes very large, scattered or confluent, roundish, pulverulent, blackish-brown; spores ellipsoid to ob- long, rounded above, not thickened, hardly constricted, rounded or gently attenuated below, smooth, brown, 30—50 x 15—23 /a; pedicels hyaline, thin, deciduous, about as long as the spore. On Apiam graveolens. Not common. iEcidia in May and June; teleutospores September—November. Distinguished from many of its close allies by the possession of an aecidium. (Fig. 132.) Distribution : Central and Northern Europe, East Indies, Japan, Tasmania. 57. Puccinia iEgopodii Mart. Credo JEgopodii Schum. Plant. Sail. ii. 233. Puccinia JEgopodii Mart. Fl. Mosquen. p. 226. Cooke, Handb. p. 502 ; Micr. Fung. p. 208. Plowr. Ured. p. 201. Sacc. Syll. vii. 678 Sydow, Monogr. i. 353. Fischer, Ured. Schweiz, p. 105, f. 79. Teleutospores. Sori amphigenous, but chiefly on the petioles and nerves, on thickened yellowish spots, small, but collected into dense irregular clusters and confluent, at first black, covered by the shining epidermis which splits in places longitudinally, soon naked, pulverulent, blackish-brown; spores ob- long1 to ovoid, often irregularly angled and oblique, usually rounded above and with ' Teleutospores'. a pale wart-like apiculus 2—3 u high, hardly or not at all constricted (often broadest at the septum), more or less rounded below, smooth, clear chocolate-brown, granular, 28—48 x 15—22 /x; pedicels hyaline, short, deciduous. On jEgopodium Podagraria. April—August. Rather com- mon. (Fig. 133.) According to Tranzschel, a few isolated uredospores are to be found in the young sori; they are almost colourless, aculeate, 20—22x18/^. Semadeni proved that the spores of this fungus would infect only Mgopodium, and not any of the allied Umbellifers. In this species,. Please note that these images are extracted from
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