292 



Mycologia 



III. Telia foliicolous, epiphyllous, solitary or rarely 2-3 to- 

 gether, first subepidermal, later erumpent, minute, depressed-glo- 

 bose or oblate-ellipsoid, upper surface convex, purplish-brown or 

 castaneous, lower surface more or less flat, light-brown or light- 

 colored, looking as though attached to the substratum with pedicel- 

 like body, 1-3 mm. in diam., 0.5-1 mm. high, becoming honey-color 

 with moisture ; teliospores broad-ellipsoid, f usoid or ovoid, rounded 

 or narrowed at both ends, sometimes pointed at the apex, 2-celled 

 (rarely 3- or 1 -celled), usually equal-sized, sometimes upper cell 

 being broader and shorter, lower just opposite, or rarely vice versa, 

 constricted or not constricted, 30-50 x 15-25//,, wall castaneous, 

 1.5-2.5 /x, the pores 2 in each cell near the septum, or 1 apically in 

 the upper, 2 laterally in the lower cell ; colorless spores oblong 

 short-cylindrical or fusoid, rounded or narrowed at both ends, 2- 

 celled, the cells equal or unequal, upper being larger or just oppo- 

 site, mostly not constricted but rarely much constricted, wall ful- 

 vous, 1 thick, the pores mostly 1 apically in the upper, 2 laterally 

 in the lower cell, or 2 in each cell near the septum ; 3-celled spores 

 clavate or oblong, not constricted at the septum or slightly con- 

 stricted, 64-66 x 15-18 /a; 1 -celled spores globose, ovoid or ellip- 

 soid, 22-25 x 20-22 fx, round ones 22 /x in diam., wall 2-2.5 /* thick; 

 pedicels cylindrical, very long, 4-9 ^ thick, hyaline ; promycelia at 

 first cylindrical, later occasionally elongate into hyphal form of 

 5-7 /j, thick, or simply curved, 3-celled and 5-8 //, thick ; sterigmata 

 filiform, 15-20 x 2-4^, terminated by sporidia; sporidia reniform 

 or ellipsoid, orange-colored, 10-16 x 5-9 /x. 



On Juniper us lift oralis. 



Type locality: Totomi province (Shidzuoka-ken) Mikatagahara, 

 Mar. 20, 1919 (K. Hara), Mar. 21, 1919 (K. Yoshida), Apr. 7, 

 1919 (Y. Watanabe). 



Illustrations: 1 black-and-white plate giving 15 figures to show 

 aecial form on Japanese pear leaf : section of a pycnium, its ostiolar 

 filaments, pedicels of pycnospore, pycnospores, section of an 

 aecium, peridial cells, formation of aeciospores, mature aeciospores, 

 telia on leaves of /. littoralis, a swollen telium, colored teliospores, 

 colorless teliospores, germination of teliospores and sporidia. 



The appearance of the aecial stage is quite similar to that of 

 G. asiaticum, except the aecia look more or less purplish in color. 



Notes : Sand-pear culture in the Mikatagahara region was 

 given up some time ago on account of the virulence of rust, though 



