. Fungous diseases of plants, with chapters on physiology, culture methods and technique . Fig. 210. Fhragmidium subcorticiuma and d^ caeoma and teleuto stages on rose ; b^ c, and r, spore forms usually in small black groups. A teleutospore is more or lessspindle-shaped, usually six to eight cells in extent (Fig. 210, e), andeach cell is provided with several germ pores. The outer wall ofthe spore is generally uneven or warty toward the apex, andthere is a distinct terminal papilla. The teleutospores measure65-100 X 30-45 />t without the pedicel. The pedicel is persistent,swollen at the bas
. Fungous diseases of plants, with chapters on physiology, culture methods and technique . Fig. 210. Fhragmidium subcorticiuma and d^ caeoma and teleuto stages on rose ; b^ c, and r, spore forms usually in small black groups. A teleutospore is more or lessspindle-shaped, usually six to eight cells in extent (Fig. 210, e), andeach cell is provided with several germ pores. The outer wall ofthe spore is generally uneven or warty toward the apex, andthere is a distinct terminal papilla. The teleutospores measure65-100 X 30-45 />t without the pedicel. The pedicel is persistent,swollen at the base, and about as long as the spore. The cells ofthe teleutospore adhere closely, while in some other species theyseparate readily on maturity. 432 FUNGOUS DISEASES OF PLANTS XXV. RUST OF RHODODENDRON AND NORWAY SPRUCEChrysomyxa Rhododendii (De C.) De Bary Occurrence. The rhododendron rust is especially abundant inportions of Europe and America, particularly in regions where thewild species of the rhododendron and of the fir grow together inthe same forest areas. In fact, the rust is the
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