ox THE üREniNEAE PARASITIC OS THE JAPANESE GRAMINEAE. .209 



seed from Dublany. The species of Puccinia known to infect Aira 

 (DLSf/iainpsia) are Puccinia graminis, P. coronatd, P. borcalis and P. Baryi. 

 All tli£se species, however, do not agree with our fuhgiis w^hich on the con- 

 trary resembles very closely Pjucinia Poariim and is here provisionally 

 placed in the species under consideration. 



21. Puccinia ishikariensis S. Ito. n. sp. — (PI. XL Fig. 6.) 

 Uredosori, epiphyllous ; oblong or linear, minute, on the brownish 

 discolored spots, gregarious, often confluent, immersed between the veins, 

 naked, pulverulent, brown-colored. Uredospores, globose, sublobose or 

 piriform, echinulate (distance between spines about 3 /<), yellow or brownish 

 yellow in color, 20 — 36X 14— 28 m ; epispore 2 — 3/-^ thick ; germ-pores 6 — 8, 

 scattered ; paraphyses numerous, clavate or capitate, apex not thickened, 

 ycJlowish, 50 — Sox 17— 18 «. 



Tclcittosori, amphigenous ; small, oblong or linear, densely scattered 

 over the surface, arranged in lines, rarely confluent, long covered by the 

 epidermis, at length naked, with tlie torn remains, compact, somewhat 

 pulvinate, grey or black ; surrounded by the thick bed of brown paraphyses. 

 Uredospores are frequently mixed in the sori. Teleutospores, cylindrical, 

 cuneate or oblong-clavate, unsymmetrical, apex thickened (4— 6/i), truncate, 

 rounded or shortly apiculate, base attenuated or cuneate, not or slightly con- 

 stricted at the septum, smooth, brownish-orange, lighter colored at the 

 lower cell, 36 — 60x14 — 24,«; epispore thin; pedicels short, brown, sub- 

 deciduous. 



Hab. On ^Foliiiia jafonica Hack. ■ , " 



Hokkaido.— Prov. Ishikari : Tsuisliikari (It. Sept. 29, 1937- S. Ito; II. & TIT. Oct. 6, 1907. 

 A. Kasai). 

 •' ■ Distrib. Japan. 



Remarks. The species of Puccinia hitherto know to grow on Molinia 

 are Puccinia graminis, P. corona ta, P. Moliniae, P. Diplaclinis and P. 

 aiistralis. 



Except the one last mentioned all other species occur in Japan, and 

 they differ entirely from the present species. Our plant differs also from 

 Puccinia aiistralis. It is distinguished from Puccinia cvronata by the 



