. A practical course in botany, with especial reference to its bearings on agriculture, economics, and sanitation. Botany. 326 PRACTICAL COURSE IN BOTANY 463 375. The hymenium. — Cut a tangential section through one side of the pileus and sketch the section of the gills as they appear under a lens, or a low power of the microscope. Notice that the blade consists of a central portion called the trama (tr, Fig. 462) and a somewhat thickened portion, h, constituting the hymenium, or spore-bearing surface. Now exam- ine, under a high power, a small sec- tion from the edge of a gill, including a bi
. A practical course in botany, with especial reference to its bearings on agriculture, economics, and sanitation. Botany. 326 PRACTICAL COURSE IN BOTANY 463 375. The hymenium. — Cut a tangential section through one side of the pileus and sketch the section of the gills as they appear under a lens, or a low power of the microscope. Notice that the blade consists of a central portion called the trama (tr, Fig. 462) and a somewhat thickened portion, h, constituting the hymenium, or spore-bearing surface. Now exam- ine, under a high power, a small sec- tion from the edge of a gill, including a bit of the trama. Notice that this last consists of a tissue of mycelial cells (Fig. 463) covered by the hy- menium, or spore-bearing membrane, which is thickly clothed with a layer of elongated, club-shaped cells (b, b and p, p, Fig. 463) set upon it at right angles to the surface. Some of these put out from two to four, or in some species as many as eight, little prongs, each bearing a spore (s, s, 461 462 Figs. 461-463. — Section of a gilled mushroom : 461, through one side, showing sections of the pendent gills, g, g (slightly mag- nified) ; 462, one of the gills more enlarged, showing the cen- tral tissue of the trama, tr, and the broad border formed by the hymenium, h 463, a small sec- tion of one side of a gill very much enlarged, showing the club-shaped basidia, b, 6, stand- ing at right angles to the surface, bearing each two small branches with a spore, s, s, at the end. The sterile paraphyses, p, are seen mixed with the basidia. 463), while others re- main sterile. The spore- bearing cells are called basidia; the steri e ones, paraphyses; and the whole spore-bearing surface together, the hymenium, from a Greek word meaning a membrane. It is from the presence. 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 th
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Keywords: ., bookauthorand, bookcentury1900, bookdecade1910, booksubjectbotany
