ON JUNCACE.E 



239 



On Luzula campestris, L. maxima, L. pilosa. Uredospores, 

 May — July; teleutospores, September — November. (Fig. 184.) 



Fig. 184. P. oblongata. Teleutospores (one abnormal) and a mesospore; 

 b, uredospores ; all on same leaf of L. pilosa. 



The uredospores are said to be always smooth, more or less obovate, 

 and often irregular. It is stated by Sydow that they can survive the 

 winter. Fischer figures anomalous spores, of both kinds, including three- 

 celled and one-celled teleutospores. 



Plowright's suggestion that this is probably a heteroecious species has, 

 so far, received not the slightest confirmation. The greatly thickened 

 summit of the teleutospores is very striking ; they are produced in the 

 old uredo-sori, especially towards the tip of the leaves, so that in a 

 sorus which is producing uredospores a few young teleutospores may be 

 found, and the fully-formed ones are surrounded by the numerous persistent 

 uredospore-pedicels. 



It is, no doubt, very heterodox, but I cannot help expressing the 

 opinion that P. oblongata is merely an abnormal development of P. obscura. 

 On the same leaf of Luzula pilosa, if not in the same sorus, I have 

 found almost all the various kinds of spores figured by Fischer under both 



species. Uredo oblongata Grev. Scot. Crypt. Flor. pi. 12, doubtless 



includes this form, but his figure is P. Caricis. 



Distribution : Central and Northern Europe. 



107. Puccinia Scirpi DC. 



JEcidium JYi/mphoidis DC. Flor. fr. ii. 597 and vi. 93. Plowr. Gard. 



Chron. 1895, xviii. 96, 135. 

 Puccinia Scirpi DC. Flor. fr. ii. 223. Plowr. Ured. p. 191. Sacc. 



Syll. vii. 659. Sydow, Monogr. i. 688. Trans. Brit. Myc. Soc. 



i. 58. Fischer, Ured. Schweiz, p. 298, f. 218. 



