. W'^. Fig. 8 ASCOMYCETES 1. Peziza. 2. Balansia trinitensis. 3. Scleroderris. 4. Perithecia and Conidia of an Erysiphe. 5. Nectria 6. Xylaria. 7. Hypoxylon. 8. Pseudovalsa. From Engler & Prantl. Nat. Pflanz. Perisporiacese (which include the fungi of "black blight") have mycelium which is superficial on the host plant, commonly on leaves, and have the asci enclosed in more or less spherical

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectplantdi, bookyear1923