I so British Uredinece and Ustilaginece 



Synonyms. 



,£cidiu;n lapsance. Schultz, " Prod. Flor. Starg.," p. 454. 



Puccinia lapsance, Fckl. Schrot., " Krypt. Flor. Schl.," 

 p. 318. Cooke, "Micro. Fungi," 4tli edit, p. 207. 



^■Ecidhim lapance, Purton. Cooke, " Hdbk.," p. 543 ; 

 " Micro. Fungi," 4th edit., p. 198. 



^cidhunprenanthis, Pers. Cooke, " Hdbk,," p. 542 ; " Micro. 

 Fungi," 4th edit., p. 198. 



Trichobasis lapsancE, Fckl. Cooke, " Micro. Fungi," 4th 

 edit., p. 224. 



Exsiccati. 



Cooke, i. 13; ii. 91, 92. Vize, "Micro. Fungi," 162, 169. 



On Lapsana communis, Crepis paludosa. 



^cidiospores, March to April ; uredospores, April to June ; 

 teleutospores, June to August. 



Biology. — This species is said by Schroter to occur on Crepis 

 p iludosa. It is certainly distinct from Puccinia variabilis and taraxaci 

 on Taraxacum, as neither the tecidiospores, uredospores, nor teleuto- 

 spores of P. lapsancE, when applied to Taraxacum in duplicated ex- 

 periments made in 18S5, had any effect (Exp. 481, 497, 499, 5°°), 

 although they readily enough infected plants of Lapsana communis. 

 The species which occurs so frequently on the Composita; is without 

 lecidiospores. 



Puccinia variabilis. (Grev.) 



.Ecidiospores — Spots very small, purple, scattered over the under 

 surface of the leaves, from 2 to 5 mm. across. Pseudoperidia 

 often single, cup-shaped, with torn whitish edges. Spores sub- 

 globose or oval, hyaline, with orange contents, echinulate, 

 20-25 X 15-20/X. 



Uredospores | Sori small, round or elongate, dark brown, soon 



Teleutospores] naked, containing both spore-forms. 



Uredospores scanty, subglobose, often irregular, brown, echinulate, 

 20-25/x in diameter. Teleutospores oval, oblong, often sub- 

 globose, frequently distorted in various ways, constriction 

 almost none, dark brown, finely verrucose, 28-30 X 1S-20/A. 

 Pedicels hyaline, deciduous, of variable length. 



