. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. 250 OTHER BASIDIOMYCETES been shed. It has been estimated that a moderate-sized specimen will produce some 1,800,000,000 spores, and other allied species form spores in even greater profusion ! In the genus Boletus, whose fruit-body has the same general form as that of the Mushroom, the underside of the cap presents the structure of a honeycomb, consisting of a multitude of vertical tubes, the inner surfaces of which are lined with hymenium (Fig. 134, E). A similar construction is seen in the Bracket Fungus [
. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. 250 OTHER BASIDIOMYCETES been shed. It has been estimated that a moderate-sized specimen will produce some 1,800,000,000 spores, and other allied species form spores in even greater profusion ! In the genus Boletus, whose fruit-body has the same general form as that of the Mushroom, the underside of the cap presents the structure of a honeycomb, consisting of a multitude of vertical tubes, the inner surfaces of which are lined with hymenium (Fig. 134, E). A similar construction is seen in the Bracket Fungus [Polyporus sqitamosus), whose thick tough fruit-bodies are commonly found on decaying tree-trunks, to which they are attached along one side of the cap (Fig. 133). Some of the related Fungi [ Dadalea qucrcina) have woody fructifications which may persist for several years. In Hydnuni (Fig. 134, F) the hymenium covers the numerous pointed pro- jections arising from the underside of the cap. As further instances of the diversity of form pre- sented by the fruit-bodies of the Basidiomycetes, men- tion may be made of the purple encrusting fruits of the Fungus responsible for the Silver-leaf disease of the Plum [Stereum purpiireum), of the Puff-balls [Lycoperdon, Fig. 134, C), whose spores form a powdery mass within the pear- shaped fructification, and of the Coral Fungus {Clavaria, Fig. 134, B), where the fruit-body is richly branched and bears the hymenium over its entire surface. In conclusion, a brief reference must be made to the Slime Fungi (Myxontycetes), whose relation to other Thallophyta is exceedingly obscure ; in some respects they show decided re- semblances to Protozoa, although the methods of multiplication recall those habitual among lower plants. The Slime Fungi are most evident in damp weather, when the large naked protoplasmic masses (Plasmodia), constituting the vegetative phase, creep out from the crevices of the decaying tree stumps, humus, or other. Fig. 13
Size: 1735px × 1440px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectpl, booksubjectplants
