. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 356 MELAMPSORA /. ythea Lini Berk.; Cooke, Eandb. p. 532; Micr. Fung. p. 222, pi. 8, f. l(>7. McAlpiue, Rusts of Australia, p. L92, f. 236 and pi. I. i. 36. Spermogones ) ^ ^^ mcidiospores J Uredosji< 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 /Lt; paraphyses not numerous, hyaline, str
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. 356 MELAMPSORA /. ythea Lini Berk.; Cooke, Eandb. p. 532; Micr. Fung. p. 222, pi. 8, f. l(>7. McAlpiue, Rusts of Australia, p. L92, f. 236 and pi. I. i. 36. Spermogones ) ^ ^^ mcidiospores J Uredosji< 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 /Lt; paraphyses not numerous, hyaline, strongly capitate, much thickened above, 20—25 /x Y'il'. 200. M. Lini. a. teleutospores; b, plan of same ; c, paraphysis and two uredospores. On L. catharticum. Teleutospores. Sori similar, but confluent, chiefly on the st tins, subepidermal, reddish-brown, at length black and shining; spores prismatic, 35—60x7—10 fM) 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^, McAlpiue) and attempts to infect L. usitatissimum from L. catharticum have uniformly failed; it is therefore considered by some as a biological race or even species=Melampsora liniperda Kornicke (Centralbl. f. Bakter. 1911, 2. xxxii. 278). Teleuto- spores of this have been described as much as 80 /x long. Fromme (1912) has recently described spermogones and a-cidia 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 not perfectly resemble the original Grove, W. B. (William Bywater), 1848-1938. Cambridge, University P
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