(45i) 



Gymnosporangium Miyabei Yamada & Miyake Bot. Mag. Tokyo 



22 1 : 23. 1908. 



Aecia hypophyllous, solitary or sometimes several in a group, 

 borne in elongated protuberances of a gall-like nature, 0.2-0.3 

 mm. in diameter, 2-3 mm. high; peridium dehiscent at apex, not 

 becoming much lacerate; peridial cells usually 

 seen in both face and side views, rhombic or 

 rhomboid in side view, very thick, 42-55/1 thick 

 by 65-90/t long, outer wall moderately thin 3-5/i, 

 smooth, inner wall thick, 7-13/1, moderately and 

 densely verrucose with small oval or slightly irregu- 

 lar papillae, side walls verrucose similarly to inner 

 wall on inner half, remainder smooth; aeciospores 

 globoid, 1 8-24/1 in diameter, wall cinnamon-brown, 

 thin, 1-1.5/1, finely verrucose. _ _ FlG l6 G 



Telia caulicolous, appearing on irregular fusi- so i eno ides. 

 form enlargements with a knotty rough surface, at 

 "first covered by the periderm, soon breaking forth, pulvinate or 

 somewhat wart-shaped, often confluent, 2-3 mm. across, often 

 much longer, reddish-brown; teliospores 2-3-celled, narrowly ellip- 

 soid, n-20 by 41-80^, rounded or slightly narrowed at both ends, 

 wall medium thin, brownish; pores usually 1 in a cell and apical, 

 sometimes near the septum in the upper cell and near the pedicel 

 in the lower. 



For the aecia: Sorbus Aria Crantz (Pyrus aria Ehrh.), 



Sorbus alnijolia K. Koch {Pyrus Miyabei Sarg.). 

 For the telia: Chamaecyparis pisifera Sieb. & Zucc. 

 Type locality: Prov. Iwaki, Japan, on Pyrus Aria (var. Kamao- 



Distribution: Japan. 

 Illustration: Bot. Mag. 22:/. 1-9. 



18. Gymnosporangium tubulatum comb. nov. 

 Roestelia tubulata Kern; Jones, Univ. Mont. Bull. 61: 64. 1910. 



Aecia chiefly hypophyllous, crowded in irregular groups on 

 thickened discolored spots, cylindric, acutish at apex, 2-3.5 mm - 

 high by 0.2-0.4 mm. in diameter; peridium firm, tardily dehiscent 

 by longitudinal slits in the lower part; peridial cells fusiform-oblong 

 in face view, 18-26X48-80/*, oblong in side view, 16-24/1 thick, 

 outer wall rather thin, 1-1.5/*, smooth, inner and side walls rather 

 thick, 5-6/i, densely and moderately rugose with ridges of varying 

 length; aeciospores globoid or broadly ellipsoid, 18-22X21-28/1, 

 wall light chestnut-brown, 1.5-2.5/1 thick, finely \ 



Telia unknown. 



