Fleteropuccinia. 163 
Trichobasis linearis, Lév. Cooke, “ Micro. Fungi,” 4th edit., 
p- 223, t. vil. figs. 143, 144. 
Eicidium berberidis, Pers. Berk., “ Eng. Flor.,” vol. v. p. 372. 
Grev., t. 97; “Flor. Edin.” p. 446. Johnst., “Flor. Berw.,” 
vol. ii. p. 207. Sow., t. 397, fig. 5. Cooke, ‘““Hdbk.,” p. 538 ; 
“ Micro. Fungi,” 4th edit., p. 195, t. i. figs. 7-9. 
Lixsiccatt, 
Cooke, i. 24, 441; il. 93, 121, 122, 124. Vize, “‘ Micro. 
Fungi Brit.,” 453, 45.6; “Fungi Brit.,” 76, 78. 
fEcidiospores on Berberis vulgaris and Mahonia ilictfolia, 
chiefly on the berries, May to July. 
Teleutospores on Triticum vulgare, repens, Secale cereale, 
Dactylis glomerata, Festuca gigantea, Alopecurus pratensis, Agrostis 
alba, Avena sativa, elatior, July and August, and throughout the 
winter. 
BIOLOGY.—The mycelium of all spore-forms is strictly localized. 
The ecidiospores on the berries of Mahonia ilicéfolial found, in May, 
1883, readily produced the uredospores on wheat in about eight or ten 
days. This is a fungus which varies very much in frequency ; some 
years almost every straw in a wheat-field is affected, in others scarcely 
one can be found attacked. Certain conditions render the wheat plant 
more susceptible to the parasite, foremost amongst which is a too large 
supply of nitrogen, as evinced by the uniformity with which wheat 
plants growing on manure-heaps are attacked with the parasite ; so 
are the plants grown on the ground where a manure-heap has stood, 
and also plants growing where an old ditch has been filled up, although 
perhaps to a less degree. A very thin, or what is termed in some 
parts of England “a gathering crop,” one in which the plants are far 
apart, and which consequently throw out a large number of lateral 
shoots, is also liable to become affected by the parasite. It is interesting 
to remark that a Puccinia occurs on Geréerts glauca in Chili, which 
is accompanied by an Accidium. Insome parts of Europe an Aicidium, 
having a perennial mycelium (4. magelhenicum, Berk. in Hooker’s 
“Flor. Antarctica,” pp. 1, 2. London: 1844-1847), occurs on Berberis 
vulgaris, which has been shown by Magnus to have a distinct life- 
history. 
Puccinia coronata. Corda. 
Acidiospores—Pseudoperidia often on very large orange swell- 
ings, causing great distortions on the leaves and peduncles, 
