. The British rust fungi (Uredinales), their biology and classification. Uredineae. 356 MELAMPSORA Lecythea Lini Berk. ; Cooke, Handb. p. 532 ; Micr. Fung. p. 222, pi. 8, f. 165—7. Melampsora Lini Desm. PL Crypt, no. 2049. Plowr. Ured. p. 237. Sacc. Syll. vii. 588. Fischer, Ured. Schweiz, p. 507. McAlpine, Rusts of Australia, p. 192, f. 236 and pi. I, f. 36. See below. Spermogones jEcidiospores Uredospores. Sori amphigenous and on the stems, small, scattered, roundish or oblong, flatly pulvinate, subepidermal, (<'at first covered by a parenchymatous peridium, Fischer), orange; spores roundi
. The British rust fungi (Uredinales), their biology and classification. Uredineae. 356 MELAMPSORA Lecythea Lini Berk. ; Cooke, Handb. p. 532 ; Micr. Fung. p. 222, pi. 8, f. 165—7. Melampsora Lini Desm. PL Crypt, no. 2049. Plowr. Ured. p. 237. Sacc. Syll. vii. 588. Fischer, Ured. Schweiz, p. 507. McAlpine, Rusts of Australia, p. 192, f. 236 and pi. I, f. 36. See below. Spermogones jEcidiospores Uredospores. Sori amphigenous and on the stems, small, scattered, roundish or oblong, flatly pulvinate, subepidermal, (<'at first covered by a parenchymatous peridium, Fischer), orange; spores roundish to ellipsoid, echinulate, orange-yellow, 16—24 X 12—17 yu.; paraphyses not numerous, hyaline, strongly capitate, much thickened above, 20—25 yu, Fig. 26G. M. Lini. a, teleutospores; h, plan of same ; c, pai'apliysis and two uredospores. On L. catharticum. Teleutospores. Sori similar, but confluent, chiefly on the stems, subepidermal, reddish-brown, at length black and shining; spores prismatic, 35—60 x 7—10 fx; epispore thin, yellowish- brown, rather thickened above and darker. On Linum catharticum. (Fig. 266.) June—October. Not uncommon. Forms of Melampsora Lini occur widely on many species of Linum and have usually been regarded as identical. That which often acts as a very destructive parasite wherever the common Flax is cultivated has consider- ably wider teleutospores (17—20/x, McAlpine) and attempts to infect L. usitatissimum from L. catharticum have uniformly failed; it is therefore considered by some as a biological race or even H^ec,ies, = Melampso7'a liniperda Kornicke (Centralbl. f. Bakter. 1911, 2. xxxii. 278). Teleuto- spores of this have been described as much as 80 ju long. Fromme (1912) has recently described spermogones and ajoidia to this form on cultivated. 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 n
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