. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLAxNT DISEASE 419 It causes a heart-rot of living oaks, occurring as a wound parasite and invading the sap wood when decay is well advanced. It is also found on black locust/'^ P. sulphureus (Bui.) ;' "⢠'«⢠''â "â¢Â«" Hymenophore cespitose-multiplex, 30-60 em. broad; pileus cheesy, not becoming rigid, reniform, very broad, more or less stipitate, 5-15 x 7-20 x cm.; surface finelj tomentose to glabrous, rugose, anoderm, sub- zonate at times, vary- ing from lemon-yellow to orang
. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLAxNT DISEASE 419 It causes a heart-rot of living oaks, occurring as a wound parasite and invading the sap wood when decay is well advanced. It is also found on black locust/'^ P. sulphureus (Bui.) ;' "⢠'«⢠''â "â¢Â«" Hymenophore cespitose-multiplex, 30-60 em. broad; pileus cheesy, not becoming rigid, reniform, very broad, more or less stipitate, 5-15 x 7-20 x cm.; surface finelj tomentose to glabrous, rugose, anoderm, sub- zonate at times, vary- ing from lemon-yellow to orange, fading out with age; margin thin, fertile, concolorous, subzonate, finely to- rn e n to s e, undulate, rarely lobed; context cheesy, very fragile when dry, yellow when fresh, usually white in dried specimens, homogenous, 3-7 mm. thick; tubes annual, 2-3 mm. long, sulphur-yellow within; mouths minute, angular, somewhat irregular, 3^ to a mm., edges very thin, lacerate, sulphur-yellow, with color fairly permanent in dried specimens; spores ovoid, smooth or finely papillate, hyaline, 6-8 x 3-5 ju. It is common as a cause of red heart-rot of forest and shade trees, conifers and deciduous, and also does damage in the orchard, especially on cherry, apple and pear, and in the forest to oak, chest- nut, poplar, maple, walnut, butternut, alder, locust, ash, pine, hemlock, larch. The decayed wood resembles a mass of red-brown charcoal and is characterized by radial or concentric cracks in which the fungus forms thin leathery sheets. In dicotyledons the vessels become filled with the fungus. Round gonidia are often formed within the wood. P. squamosus (Huds.) Fr. "⢠"⢠" Sporophore of immense size, reaching 50 cm. in breadth and 3 Fig. 300.âPolyporus sulphureus. Scattered fruit bodies on living oak. After Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloratio
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
