. The British rust fungi (Uredinales), their biology and classification. Uredineae. 374 HYALOPSORA possible alternate hosts. This is in itself improbable and is inconsistent with Arthur's suggestion that of the two kinds of uredospores the first kind represents aecidiospores. 1. Hyalopsora Aspidiotus Magn. Uredo Polypodii Schrot. Krypt. Flor. Schles. iii. 374. Plowr. Ured. p. 256 Sacc. Syll. vii. 857 U. Aspidiotus Peck in Ann. Eep. N, Y. State Mus. xxiv. 88. Melampsorella Aspidiotus Magn. Ber. Deutsch. Bot. Gesell. xiii. 288. Pucciniastnmi Aspidiotus Karsten, Bidr. Finl. Nat. Folk, 1
. The British rust fungi (Uredinales), their biology and classification. Uredineae. 374 HYALOPSORA possible alternate hosts. This is in itself improbable and is inconsistent with Arthur's suggestion that of the two kinds of uredospores the first kind represents aecidiospores. 1. Hyalopsora Aspidiotus Magn. Uredo Polypodii Schrot. Krypt. Flor. Schles. iii. 374. Plowr. Ured. p. 256 Sacc. Syll. vii. 857 U. Aspidiotus Peck in Ann. Eep. N, Y. State Mus. xxiv. 88. Melampsorella Aspidiotus Magn. Ber. Deutsch. Bot. Gesell. xiii. 288. Pucciniastnmi Aspidiotus Karsten, Bidr. Finl. Nat. Folk, 1879, xxxi. 143. Hyalopsora Aspidiotus Magn. Ber. Deutsch. Bot. Gesell. 1901, xix. 582. Arthur, N. Amer. Flor. vii. 112. H. Polypodii-Dryopteridis Magn. in Hedwig. 1902, p. 224. Fischer, Ured. Schweiz, p. 472, f. 308. Uredospores. Sori amphigenous, scattered, small, round, up to I mm., golden-yellow, without a peridium, dehiscing irregularly, often seated on yellowish spots; spores oblong or ellipsoid, of two kinds, (1) thick-walled (2|^3|^/.t), with very. Fig. 279. H. Aspidiotus. Part of frond of P. Dryopteris, showing uredo-sori, nat. size ; three spores, all from the same sorus (Scotland). faint, hardly perceptible warts, 36—72 x 30—40 /a, with 6—8 scattered germ-pores, (2) thin-walled (about Ihi^), covered uniformly with very faint scattered warts, 28—40 x 16—26 ix, with four indistinct equatorial germ-pores; paraphyses few. Teleutospores. In the epidermal cells, often filling them completely, roundish or irregular, flattened where they are in contact, sometimes arranged in two layers, about 25 yu. high, 21—35//- or more wide, divided by vertical septa into 3—5. 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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