. Botany for academies and colleges: consisting of plant development and structure from seaweed to clematis. Botany; 1889. 30 ACADEMIC BOTANY. 54. The Mushrooms include many genera: Clavaria (Fig. 22, 7), Hydnum, Boletus, Polyporus, and' others, besides the true Mushrooms, Agaricus (Fig. 22, 4, 5, e), and Ama- nita. The fairy- rings, so venerated by the superstitious and so long a puzzle to scientists, are the work of mushrooms. Several species— Agaricus oreades (Fig. 22, 6), A. coc- cineus, and others— have a tendency to grow centrifugally in excess. The spot on which they grow soon becomes u
. Botany for academies and colleges: consisting of plant development and structure from seaweed to clematis. Botany; 1889. 30 ACADEMIC BOTANY. 54. The Mushrooms include many genera: Clavaria (Fig. 22, 7), Hydnum, Boletus, Polyporus, and' others, besides the true Mushrooms, Agaricus (Fig. 22, 4, 5, e), and Ama- nita. The fairy- rings, so venerated by the superstitious and so long a puzzle to scientists, are the work of mushrooms. Several species— Agaricus oreades (Fig. 22, 6), A. coc- cineus, and others— have a tendency to grow centrifugally in excess. The spot on which they grow soon becomes unfit for their support, and they spread outward with almost mathe- matical precision, leaving bare rings. These rings at first produce nothing, but they eventually become fertile from the decayed remains of the mushrooms. Abundant grasses then spring up, which form the fairy- rings. These rings grow larger continually as the mush- rooms spread, until some obstacle breaks the circle. 55. The vegetative part of the Fungi is called Mycelium (pi. mycelia), from the Gr. myhos, mw/cos, mushi'oom (Figs. 19, 20). This consists of elongated cells called hyphce, which are isolated or collected in threads, or united into a web or membrane (hymen). The mycelium is sometimes barely visible, but often it is conspicuous, sometimes root- like. The flower-cluster (called Receptacle) grows out of this mycelium; in the Mushroom it is called Pileus, or cap. When there is a flower-stalk it is called a Stipe, as in the Moulds (Figs. 19, 20) and the Mushrooms (Fig. 22). The surface on which the flowers grow in mushrooms is the Hymenium, or membrane. It covers the Gills {lameU(s) on. Fig. , St. Georsje's Agaric {AgarUms Georgii; d, young. 5, Common Mushroom {A. campealris); e, young, (i, Fairy-ring Mushroom {A. oreades); f, young. 7, Clavaria phi^loidee; g, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colo
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