Brachypuccinia. 187 
or circinating. Spores ovate, round, or subpyriform, echinu- 
late, brown, 25-30 X 254. Secondary: Sori small, very pro- 
fuse, round, cinnamon-brown, soon pulverulent, often confluent. 
Spores subglobose, brown, echinulate, 20-25 in diameter. 
Teleutospores—Sori amphigenous, minute, blackish, round, pul- 
verulent, surrounded by the ruptured epidermis. Spores 
obtuse, shortly oval, ovoid, or even subglobose, constriction 
almost none, brown, echinulate, especially above, 30-40 X 
20-254. Pedicels short, hyaline, deciduous. 
SYNONYMS. 
Puccinia variabilis. Grev., ‘Flor. Edin.,” p. 431; ‘ Flor. 
Scot.,” t. 75. Cooke, “ Hdbk.,” p. 500; “ Micro. Fungi,” 4th 
edit., p. 207, t. 4, figs. 82, 83. Johnst., “Flor. Berw.,” vol. vi. 
p. 196, all in part. 
Puccinia flosculosorum .{Alb. and Schw.). Winter in Rabh., 
“Krypt. Flor.,” p. 206, in part. 
Exsiccati. 
Cooke, i. 539; ii. 128. Vize, “ Micro. Fungi Brit.,” 53. 
On Zaraxacum officinale. 
April to November. 
BIOLOGY.—The spermogonia and primary uredospores occur early 
in the year, about the end of April. Mr. Grove considers this species 
has a true Aicidium (4c. grevilled, Grove), which is scattered over 
the leaves in small clusters. If this had been the case, I think I must 
have met with it, as I have for many years searched the Taraxacum 
in the neighbourhood of King’s Lynn for the Accidium. It has been 
asserted that the Pucciniz on the Composite belong to-one species, 
but this is clearly incorrect. I found, for instance, that the zecidio- 
spores of P. lapsane, placed on Taraxacum officinale and Lapsana 
communis in a duplicated culture, produced the uredospores on the 
latter in twenty days, but had no effect upon Taraxacum (Exp. 497, 
498), and conversely the germinating teleutospores of P. /apsane@ pro- 
duced the zecidiospores on ZL. communis in twenty days, but had no 
effect upon the Taraxacum (Exp. 499, 500). I also found that the 
teleutospores on Leontodon autumnalis (Exp. 620), and the uredospores 
on Centaurea nigra (923), when applied to Taraxacum officinale, pro- 
duced no effect, although they readily infected their respective host- 
plants. 
P. tavaxaci is a much more common species than P. variabilis, 
