. Un cours pratique de botanique, avec une référence particulière à ses roulements sur l'agriculture, de l'économie, et de l'assainissement. La botanique. Fig. 466. - D'une impression de spores de champignons branchies. de cette membrane de fructification élargi que la catégorie des chambres- mush nous envisageons tire son nom botanique, Hymeno- champignons zygomycètes, membrane. L'hyménium n'est pas toujours porté par des branchies, mais est organisée de diverses manières, qui servent de base pratique pour distinguer les différents ordres. Dans le tube de champignons, à qui l'appartient bolets (Figs. 464, 465), la baside sont placés le long de l'intérieur de petits tubes cette ligne

• Contributeur: The Book Worm
• ID de l’image: RE2J26
• Taille du fichier: 7,1 MB (172,6 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 1274 x 1961 px | 21,6 x 33,2 cm | 8,5 x 13,1 inches | 150dpi

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. A practical course in botany, with especial reference to its bearings on agriculture, economics, and sanitation. Botany. Fig. 466. — Spore print of a gilled mushroom. of this expanded fruiting membrane that the class of mush- rooms we are considering gets its botanical name, Hymeno- mycetes, membrane fungi. The hymenium is not always borne on gills, but is arranged in various ways which serve as a convenient basis for distinguishing the different orders. In the tube fungi, to which the edible boletus belongs (Figs. 464, 465), the basidia are placed along the inside of little tubes that line the under side of the pileus, giving it the appear- ance of a honeycomb. In another order, the porcupine fungi, they are arranged on the outside of project- ing spines or teeth, while in the | morelles they are held in little cups or basins. 376. Spore prints. — When the gills are ripe, they shed their spores in great abundance. Take up the pileus that was laid on paper, as directed under Material, on page 323, and examine the print made by the discharged spores; it will be found to give an exact representation of the under side of the pileus. 377. The spores. — Notice the color of the spores as shown in the print. This is a matter of importance in dis- tinguishing gill-bearing fungi, which are divided into five sections according to the color of the spores. One source of danger, at least, to mushroom eaters would be avoided if this difference was always attended to, for the deadly amanita (Amanita phalloides) and the almost equally dangerous fly mushroom (A. muscaria) both have white spores, . Fig. 467. — Deadly agaric (Amanita phalloides), show- ing the broad pendent annu- lus, a, formed by the rup- tured veil; the cup at the base, c, and floccose patches on the pileus, left by the breaking up of the volva.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these ill

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