ON COMPOSITE 



149 



On Hypochoeris radicata. Not uncommon. July — Sep- 

 tember. The records from other countries include all the three 

 British species of Hypochoeris. Only uredospores were seen 

 in British specimens. (Figs. 100, 101.) 



Fig. 100. P. Hypoehoeridis. 



Uredospore (British) on 

 H. radicata. 



Fig. 101. P. Hypoehoeridis. Teleuto- 

 spores aud uredospore, on H. glabra 

 (Berlin, ex herb. Sydow). 



This species, which has been often stated to be a Brachypuccinia, differs 

 from most others of the type of P. Hieracii in having two kinds of 

 uredo-sori — the primary ones 1 — 2 mm. wide, and only on the leaves, the 

 secondary ones conspicuously smaller, almost punctiform. In this respect 

 it approaches P. Cyani and P. obtegens, but Jacky showed that in his 

 cultures it did not produce spermogones (Centralbl. f. Bakter. 1907, xviii. 

 83), as they do. The alleged punctations of the teleutospores were 

 invisible in all the specimens I have seen. 



Distribution : Europe, Siberia, North America, Chili, 

 Australia. 



24. Puccinia Leontodontis Jacky. 



Puccinia Hieracii Plowr. Ured. p. 184 p.p. 

 P. Leontodontis Jacky, Composit.-Puccin. p. 75. 

 114 Fischer, Ured. Schweiz, p. 231, f. 182. 



Sydow, Monogr. i. 



Uredospores. Sori amphigenous, but chiefly hypophyllous, 

 scattered, not confluent, minute, punctiform, surrounded by the 

 cleft epidermis, cinnamon ; spores globose to ellipsoid, echinu- 

 late, brown, 25 — 32 ^ diam. or 27 — 35 x 24 — 27 /x, always with 

 two opposite germ-pores above the equator. 



Teleutospores. Sori similar, but darker-brown; spores 

 variable, ellipsoid to oblong or obovate, rounded at both ends, 

 not thickened above, not constricted, delicately verruculose or 



