ON RUBIACE.E 



167 



On Galium Cruciata. Not uncommon. Uredospores, May 

 — July; teleutospores, August, September. (Fig. 116.) 



Distinguished at once from P. Valantiae on the same host by the dark 

 colour of its teleutospores, and their very great and dark apical thickening. 

 The presence of uredospores also distinguishes them ; in P. Celakovskyana 

 the two kinds of sori are often present together on the same leaf, the 

 uredo-sori pale brown, and the teleuto-sori almost black. 



According to Bubak, almost its only distinction from P. punctata lies 

 in the absence of the eecidium whose place is taken by the primary uredo- 

 sori. Wurth reports it also (I.e.) on G. pedemontaniim, on the continent, 

 but demonstrated by culture-experiments that it could not be transferred 

 to other species of Galium. Most of the records of P. punctata on 

 G. Cruciata probably belong to this species, which certainly shows few 

 morphological distinctions from the former ; [ find, however, that the 

 teleuto-sori are larger, more numerous, and more compact in this species 

 than in that found on G. palustre. 



Distribution: Central Europe. 



39. Puccinia Valantiae Pers. 



Puccinia Valantiae Pers. Obs. Myc. ii. 25. Cooke, Handb. p. 500 ; 



Micr. Fung. p. 207. Plowr. Ured. p. 212. Sacc. Syll. vii. 685. 



Sydow, Monogr. i. 217. Fischer, Ured. Schweiz, p. 336, f. 248. 

 P. acuminata Fckl. ; Cooke, Micr. Fung. p. 208. 



Teleutospores. Sori hypophyllous, rather thick, pulvinate, 

 compact, orbicular, scattered, circinate 

 or confluent, up to 2 mm. diam., at first 

 yellowish-, then chestnut-brown,at length 

 greyish-brown (from the spores germi- 

 nating in situ), often elongated and 

 causing distortion on the stems ; spores 

 fusoid or slightly oblong, attenuated at 

 both ends, thickened (up to 9 /x) above, 

 somewhat constricted, smooth, pallid- 

 brown, 35 — 65 x 10 — 17 fju; pedicels hya- 

 line, persistent, up to 80 /j, long. 



On Galium Cruciata, G. saxatile. 

 June — September. Common. (Fig. 117.) 



This Leptopuccinia is very distinct from P. Celakovskyana, which also 

 lives on G. Cruciata, not only by the absence of uredospores, but also by 



Fig. 117. P. Valantiae. 

 Teleutospores ; a, on 

 G. Cruciata ; b, on 

 G. saxatile. 



