MILDEWS, RUSTS AND SMUTS 
128, 
cornpact, soon .naked, dusky brown, on both surfaces of the 
leaf and on the shoots, often on yellowish spots ; spores 
oblong ,or oblong club-shaped, tip rounded, scarcely thick¬ 
ened, constricted at the septum, base rounded or narrowed, 
smooth,, brown, 60—90 x ^5—35 p, pedicel colpurl6ss^ 
persistent, up to 160 p long. 
Syn. Dicaeoma huxi, Gray. . . ^ 
Oii-.the comrnon box ixe^—Buxus sempervirens. Britain, 
Euirope;,',,Persia. , 
' Usually only occurring on the leaves, but under certain 
conditions, abundant on the young shoots. A fox cover . 
of manyacres, composed almost entirely of box, was 
cofnpletely checked in growth, and finally destroyed by this 
fungus, in Ireland." 
MALVACEAE 
MALVA 
Puccinia malvacearum, Mont.; Plowr., Ured., p. 212. 
TeUutospores. Sori on the under surface of the leaf, 
rarely also a few on the upper surface, on the leafstalks, stem 
and fruit, scattered or more or less crowded, hemispherical or 
wart-like, compact, circular, bro'^ish, then hoary from the 
presence of secondary spores,^>usually on small, yellowish 
spots ; spores oblong or somewhat'.spindle-shaped, ends 
narrowed, tip rarely rounded; thickened, scarcely constricted 
at thejseptum, smooth, yellowish^brown, 40'—75 x 18—30 
p, .pedicel colourless, persistent, up to 150 p long. 
Oh the hollyhock— Altka^ea rosea, and on 'all our mallows, 
also on "cultivated species of 
This fungus was first described from specimens collected 
in Chili in 1852. If afterwards occurred in Australia, and 
invaded Europe in .1869. For 'some- years'" afterwafdV’ 
owing do the epidemic caused by this fungus,, the cultivation 
of ilie'hollyhocU wa^s rendered practically impossible, no.w, 
however, the balance has been restored, and fungus and 
hollyhock both flourish. The‘fungus has’'spread to all 
our mallows. 
ROSACEAE 
PRUNUS 
Puccinia pruni-spinosae, Pers. 
Uredospores. Sori minute,- generally rather densely 
scattered over the under surface of the leaf, mostly on 
minute, variously coloured spots, soon naked apd pqwdery-, 
cinpainqp-browrij spores subglobose op ovateV apex not 
