. Fungi; their nature, influence, and uses;. Fungi. CLASSIFICATION. 75 Physomycetes, in which there is no proper hj'menium, and the threads proceeding from the mycelium bear vesicles contain- ing an indefinite number of sporidia. The fertile threads are either free or only slightly felted. In the order Antennariei, the threads are black and moniliform, more or less felted, bearing irregular sporangia. A common fungus named Zasmidium cellare, found in cellars, and incrusting old wine bottles, as with a blackened /elt, belongs to this order. The larger and more highly-developed order, Mucorini,
. Fungi; their nature, influence, and uses;. Fungi. CLASSIFICATION. 75 Physomycetes, in which there is no proper hj'menium, and the threads proceeding from the mycelium bear vesicles contain- ing an indefinite number of sporidia. The fertile threads are either free or only slightly felted. In the order Antennariei, the threads are black and moniliform, more or less felted, bearing irregular sporangia. A common fungus named Zasmidium cellare, found in cellars, and incrusting old wine bottles, as with a blackened /elt, belongs to this order. The larger and more highly-developed order, Mucorini, differs in the threads, which are simple or branched, being free, erect, and bearing the sporangia at the tips of the thread, or branches. Some of the species bear great external resemblance to Mucedines until the fruit is examined, when the fructifying heads, commonly globose or ovate, are found to be delicate transparent vesicles, enclosing a large number of minute sporidia ; when mature, the sporangia burst and the sporidia are set free. In some spe- cies, it has long been known that a sort of '°' '~ '^""' '^"'"'"'*- conjugation takes place between opposite , which results in the formation of a sporangium.* None of these species are destructive to vegetation, appearing only upon decaying, and not upon living, plants. A state approaching putrescence seems to be essential to their vigorous development. The following characters may be compared with those of the family pre- ceding it:— T'llamentous, tlireads free or only sligJitly felted, hearing vesicles, wMcJi contain indefinite SyOort(^/« = Physomycetes. In the last family, the Ascomycetes, we shall meet with a very great variety of forms, all agreeing in producing sporidia contained in certain cells called asci, which are produced from the hymenium. In some of these, the asci are evanescent, but in the greater number are permanent. In Onygenei, the receptacle is either club-shaped or some
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