MILDEWS, RUSTS AND SMUTS 107 
SOLIDAGO 
Puccinia virgaureae, Lib.; Plowr., Ured., p. 203. 
Teleutospores. Sori minute in dense clusters on yellow 
spots with a purple or brown border, rounded, compact, 
often radiating, blackish ; spores oblong, club-shaped or 
spindle-shaped, tip rounded or narrowed, much thickened 
and darker, not at all, or very slightly constricted at the 
septum, narrowed towards the base, smooth, yellowish 
brown, pale towards the base, 30—60 x 15—25 p, pedicel 
about half as long as the spore. 
On Soli dago virgaurea —Golden-rod. Britain and Europe 
generally. 
Plowright says the sori are surrounded by a thick bed of 
dark brown paraphyses. 
SONCHUS 
Puccinia sonchi, Rob.; Plowr., Ured., p. 196. 
Uredospores. Sori scattered or in small groups, on small 
yellowish spots, mostly on the under surface of the leaf, 
at first swollen and covered by the epidermis, then in a 
cup-shaped edging of the epidermis, yellow then brown or 
golden-brown ; spores subglobose, ehiptical or oblong, 
epispore thick, warted, ^^ehowish, 24—38 x 15—21 p. 
Teleuto spores. Sori scattered or arranged in rings, on 
irregular brown spots, covered by -the epidermis, blackish, 
on the under surface of the leaf, rarely on the stem ; spores 
elliptical or oblong, tip rounded, truncate or narrowed, 
thickened, slightly constricted at the septum, base rounded, 
or rarely narrowed, smooth, pale brown, 25—60 X 20—30 
[jL, pedicel rather long, brownish ; mesospores numerous, 
ovate, clavate or oblong, tip thickened, brownish, 45—60 
X 20—25 [X, paraphyses numerous, club-shaped, tip thick¬ 
ened. 
On leaves and stem of sow-thistles —Souchus arvensis, 
S. asper, and 5 . oleraceus. Britain, Europe generally, 
Algeria, Canaries, and Japan. 
TANACETUM 
Puccinia tanaceti, D.C.; Plowr., Ured., p. 189 (in part). 
Uredospores. Sori scattered, minute, pale brown, some¬ 
times on spots, on both sides of the leaf; spores subglobose 
or elliptical, echinulate, yellowish-brown, 25—32 X 16— 
25 ^” 
Teleuto spores. Scattered, minute, soon naked, blackish, 
