. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. L62 PUCCINIA rarely observed. 1 bave pointed but elsewhere that it is on spring flowering plants of this kind thai Micropuccinise would naturally arise (as well as n alpine plants), if they are the result of an adaptation to a shortened vegetative period. Uromycea Fica/riae may be taken as another instance of a similar character. 35. Puccinia albescens Plowr. JEcidium albescens Grev. Fl. Edin. p. 444. Cooke, Handb. p. 536 : .Micr. Fung. p. 194. Puccinia albescens Plowr. Ured. p. 153. Fischer, U
. The British rust fungi (Uredinales) their biology and classification. Rust fungi -- Great Britain. L62 PUCCINIA rarely observed. 1 bave pointed but elsewhere that it is on spring flowering plants of this kind thai Micropuccinise would naturally arise (as well as n alpine plants), if they are the result of an adaptation to a shortened vegetative period. Uromycea Fica/riae may be taken as another instance of a similar character. 35. Puccinia albescens Plowr. JEcidium albescens Grev. Fl. Edin. p. 444. Cooke, Handb. p. 536 : .Micr. Fung. p. 194. Puccinia albescens Plowr. Ured. p. 153. Fischer, Ured. Schweiz, p. 144, f. 110. P. Adoxae Hedw. ; Cooke, Micr. Fung. p. 209 Sacc. Syll. vii. 612 Sydow, Moiio»t. i. 203 Spermogones. Scattered among the <ecidia, yellowish. jEcidiospores. Scattered uniformly over the whole surface of the leaves, also on the petioles, shortly cylindrical, whitish - yellow, with a deeply cut revolute margin; spores finely warted, pale-yellowish, 15—22 /a. Uredospores. Sori minute, scattered singly or in little clusters, soon naked, brown; spores globose to ellipsoid, echinu- late, pale-brown, 21—28 x 18—25 /j,, with two germ-pores. Teleutospores. Sori similar, or teleutospores at first in the same sori as the uredospores; spores ellipsoid to subfusiform, rounded or attenuated above, with a conspicuous colourless papilla, usually more or less rounded below, hardly con- stricted, smooth, chestnut-brown, Fig. 113. P. albescens. 32—45 x 14—25/*; pedicels hyaline, Teleutospores. delicate, short, deciduous. On Adoxa Moschatellino. The aecidia appear in April or even in March, uredo- and teleutospores in May and June. Apparently not uncommon in the ascidium stage, which makes the affected leaves paler and dwarfed; but see the following paragraphs. (Fig. 113.) The uredo- and teleutospores seem to be rare in a natural state, although Schroter, Nielsen, Soppitt and Fischer have all produced them in small quantity artificially fro
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