396 UREDINEAK 



Jun. virginiana, and Jun. phoenicea. (A reported occurrence on 

 Pinus lialepensis is probably an error.) 



The sporogenous cushions are little dark-brown protuberance-s 

 which break forth in spring from swellings, or on green 



Fig. 230. — Gymnospvratmium sabinae on twigs of Junipa"UR Sahtna, at the time 

 of liberation of spores, (v. Tubeuf phot.) 



twigs and scale-leaves. These bodies absorb water, swell, and 

 run together, forming transparent gelatinous masses (Figs. 230 

 and 231). The teleutospores resemble those of G. juniperinum, 

 but have only four germ-pores ; they germinate on the 

 gelatinous masses, and produce promycelia and sporidia. The 

 latter germinate at once, chiefly on leaves of Pyrus com- 

 munis. The pycnidia are produced on the upper epidermis 

 as sticky yellow spots bearing darker dot-like pycnidia. The 

 aecidia (Eoestelia cancellata) are found in September on the 

 under-surface of the leaves of pear, also on leaf-petioles, young 

 shoots, and even on the fruits. The peridia differ from both 



