. The British rust fungi (Uredinales), their biology and classification. Uredineae. ON LILIACE^E 121 running from apex to base, evenly coloured, brown, 18—32 x 14—22/a; epispore uniformly thin, about l^fi thick; pedicels hyaline, often deciduous, as long as or longer than the spore. On leaves of Endymion non-scriptum (Scilla nutans), and also of Scilla hifolia, S. campanulata. Common. April—June. (Fig. 72.) The yellow spots and the concentric arrangement of the sori are often very marked. The mycelium is purely local. A few finely echinulate uredospores, 27 x 20 n, were found by Juel in the yo
. The British rust fungi (Uredinales), their biology and classification. Uredineae. ON LILIACE^E 121 running from apex to base, evenly coloured, brown, 18—32 x 14—22/a; epispore uniformly thin, about l^fi thick; pedicels hyaline, often deciduous, as long as or longer than the spore. On leaves of Endymion non-scriptum (Scilla nutans), and also of Scilla hifolia, S. campanulata. Common. April—June. (Fig. 72.) The yellow spots and the concentric arrangement of the sori are often very marked. The mycelium is purely local. A few finely echinulate uredospores, 27 x 20 n, were found by Juel in the young sori on Scilla ohtusifolia (Bull. Soc. Myc. Fr. xvii. 259). Distribution : Central and Southern Europe and Morocco. p. 217 Micr. Fung. p. 212. 33. Uromyces ambiguus Lev. Uredo amhigua DC. Flor. fr. vi. 64. U. Alliorum Cooke, Handb. p. 528 ; Micr. Fung. Puccinia mixta Fckl., forma simplicior Korn. Uromyces Alliorum DC. ; Cooke, Handb. p. 518 Plowr. Ured. p. 137 U. ambiguus Lev. Ann. Sci. Nat. 3, viii. 375. Sacc. Syll. vii. 543. Sydow, Monogr. ii. 262. Grove, Journ. Bot. 1911, p. 367. Uredospores. Sori amphigenous, without spots, scattered, roundish or oblong, long covered by the epidermis, yellowish; spores globose to obovate, delicately verruculose, pale-yellowish, 20—28 x 17— 22yLt; epispore 3—3|-/i thick, with six or seven germ-pores. Teleutospores. Sori am- phigenous and on the stems, on the leaves scattered, small and roundish, on the stems confluent and larger, up to 15 mm. long, always covered by the blue-grey epidermis; spores subglobose to pyriform, rounded above, without a papilla and scarcely thickened, rounded or narrowed below, smooth, brown, 20—35 x 17—24 ^u,; pedicels thin, hyaline, fragile, as much as 30 ^ Fig. 73. XJ. ambiguus. Teleutospores and uredospore on Allium Scorodo- Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appe
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