. The British rust fungi (Uredinales), their biology and classification. Uredineae. CRONARTIUM 313 As the remarkable suggested fecicliuia-stage may possibly be found in this country, it will be convenient to add here the description given of it, so as to aid in its identification: Peridermium conorum-Pice^ (j^cidium conorum-Piceae Reess.) ^cidia on the outer surface of the scales, large, i cm. or more in diam., oblong or irregular in shape, one or two (or in any case few) on each. scale, immersed, white; spores ellipsoidal, orange, 28—35 x 18— 24 [X; epispore with numerous, large, crowded, pri
. The British rust fungi (Uredinales), their biology and classification. Uredineae. CRONARTIUM 313 As the remarkable suggested fecicliuia-stage may possibly be found in this country, it will be convenient to add here the description given of it, so as to aid in its identification: Peridermium conorum-Pice^ (j^cidium conorum-Piceae Reess.) ^cidia on the outer surface of the scales, large, i cm. or more in diam., oblong or irregular in shape, one or two (or in any case few) on each. scale, immersed, white; spores ellipsoidal, orange, 28—35 x 18— 24 [X; epispore with numerous, large, crowded, prismatic warts, each about 3—4/x wide. ^^''^V-- ^- ^o"«'-'"«-^7<'^«^- '^ JLcidiospore, from .scales of On cones of Picea excelsa. Au- ^'SS.'"'''''" ^''""' ^^''^''^' gust, September. In some years rather common in the Alps and Jura Mountains. (Fig. 237.) CRONARTIUM Fries. Spermogones hemispherical, ^cidia with a broad, inflated, irregularly torn peridium; aecidiospores with a coarsely verru- cose membrane, smooth on one side, without germ-pores, separated by well-marked intercalary cells. Uredo-sori enclosed in a hemispherical peridium which opens at the summit by a narrow pore; uredospores produced singly, on pedicels, echinu- late, without germ-pores. Teleutospores absfericted in long chains, and remaining united into cylindrical columns which are horny when dry, germinating as soon as mature. Basidio- spores round, very minute. 1. Cronartium asclepiadeum Fr. Cronartium asclepiadeum Fr. Obs. Myc. i. 220 (1815). Fischer, Ured. Schweiz, p. 431, f. 295. Sacc. Syll. vii. 597. C. Paeoiiiae, Cast. Catal. PI. Marseill. p. 217 (1845). Cooke, Micr. Fung. p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Grove, William Bywater. Cambridge, Univ. Press
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