. The fungi which cause plant disease . Plant diseases; Fungi. 132 THE FUNGI WHICH CAUSE PLANT DISEASE Mitnila sclerotiorum Rost.^* which causes a disease of alfalfa in Denmark is the only pathogen of the family. The infected plants die and later the roots and stems be- come filled with black sclerotia which lie dormant about a year. Fig. 89. — Mitrula. B, habit UpOn resuming growth they be- sketch; F, asci. After Schroter. , , i- i . j i come covered by light red eleva^ tions, which bear small light red Rhizinacese (p. 131) Key to Genera of Rhizinacese Spores elliptic or spindle-s
. The fungi which cause plant disease . Plant diseases; Fungi. 132 THE FUNGI WHICH CAUSE PLANT DISEASE Mitnila sclerotiorum Rost.^* which causes a disease of alfalfa in Denmark is the only pathogen of the family. The infected plants die and later the roots and stems be- come filled with black sclerotia which lie dormant about a year. Fig. 89. — Mitrula. B, habit UpOn resuming growth they be- sketch; F, asci. After Schroter. , , i- i . j i come covered by light red eleva^ tions, which bear small light red Rhizinacese (p. 131) Key to Genera of Rhizinacese Spores elliptic or spindle-shaped" Without rhizoid-like structures 1. Psilopezia. With rhizoid-like structures 2. Rhizina, p. 132. Spores globose 3. Sphserosoma. Only one genus, Rhizina, causes disease. Rhizina Fries with some eight species is recognized by its- crust- formed, sessile, flat ascophore with root-like outgrowths from the lower side. Fig. 90. Asci cylindrical, 8- spored, opening by a lid; spores one- celled, hyaline; paraphyses many. It is often purely saprophytic, growing in burned-over spots in forests. R. inflata-(Scha£E) ;'" IS. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Stevens, Frank Lincoln, 1871-1934. New York : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
