. Introduction to the study of fungi; their organography, classification, and distribution, for the use of collectors. Fungi. 314 INTRODUCTION TO THE STUDY OF FUNGI the upper portion of the columella. In the Stemoniteae the typical genus is Sternonitis (Fig. 143), in which the sporangia are free, whilst in the other genera, as Amaurochaete, Brefeldia, and Eeticularia, the sporangia are combined into an aethalium. In the other section, called Lamprodermeae, there are some half dozen genera, in all of which the sporangia are free, but in the most numerous and typical genus, Zamproderma, the thre
. Introduction to the study of fungi; their organography, classification, and distribution, for the use of collectors. Fungi. 314 INTRODUCTION TO THE STUDY OF FUNGI the upper portion of the columella. In the Stemoniteae the typical genus is Sternonitis (Fig. 143), in which the sporangia are free, whilst in the other genera, as Amaurochaete, Brefeldia, and Eeticularia, the sporangia are combined into an aethalium. In the other section, called Lamprodermeae, there are some half dozen genera, in all of which the sporangia are free, but in the most numerous and typical genus, Zamproderma, the threads of the capillitium arise from the abrupt apex of a short columella. The third order is the Lithodermeae, which includes a great number of species, and is subdivided into two sections, in both of which there is an external deposit of lime on the wall of the sporangium. The Bidymeae have a capillitium which is wholly without lime (Fig. 144), and the Physareae a capillitium which encloses lime. We need not stay to analyse the different genera in these two sections, inasmuch as they will offer no difficulty to the student. The Didymeae includes such genera as Chondrioderma, Didymium, Lepidoderma, Spumaria, and Diachaea (Fig. 145). In Spumaria only are the spor- angia combined in an aethal- ium, in each of the other genera they are free. The typical genus, Didymium, has the sporangium encrusted with a powdery coating of lime, and the distinguishing feature of the three other genera consists in the coating of the sporangia. The Physareae include eight genera, only one of which, Fuligo, has the sporangia combined into an aethalium, as a generic character, although in other genera some of the species may form an aethalium. Physarum is a large genus in which. FlQ. 143.—Sternonitis 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 res
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