. Introduction to the study of fungi, their organography, classification, and distribution for the use of collectors . In Dothidca the stroma is erumpent and pulvinate,the sporidia again are variable, according to the species occur, in most cases, on branches, and rarelyon leaves, in which feature it differs from Pliyllacliora. In Fig. 96.—Poroniairunctata withsection (enlarged). Gard. Chron, 2oS IiXTRODUCTION TO THE STUDY OF FUNGI Euryachwa the stroma is broadly etfused and puiictulate, whilstin Homoxlcjia the stroma is plane or hemispherical, and the species are parasitic uponL
. Introduction to the study of fungi, their organography, classification, and distribution for the use of collectors . In Dothidca the stroma is erumpent and pulvinate,the sporidia again are variable, according to the species occur, in most cases, on branches, and rarelyon leaves, in which feature it differs from Pliyllacliora. In Fig. 96.—Poroniairunctata withsection (enlarged). Gard. Chron, 2oS IiXTRODUCTION TO THE STUDY OF FUNGI Euryachwa the stroma is broadly etfused and puiictulate, whilstin Homoxlcjia the stroma is plane or hemispherical, and the species are parasitic uponLichens. In Illiupogyaphusthe stroma is elongated andlinear, suggesting a resem-blance to some Hysteriaceousperithecia. Species of Phyl-lachora are common on cori-aceous leaves in tropical coun-tries, and are sometimesdifficult to distinguish atfirst from some of the PJiy-tisriioideac. In common withthe latter the stroma is oftenpresent for some time beforethe fructification is developed,hence they are often met within a sterile condition. The subfamily Rhytis-moideae is included by someon account of the mode of. Flu. 97.—Ihddiiiia, globose stroma andsectiou. Oard. Chron. authors with the Discomycdeadehiscence, which is usually by gaping fissures, so that thehymenium is more or less exposed; but this dehiscence doesnot take place until the sporidia arefully mature, and sometimes not untildisintegration has commenced. Inexternal appearance the species arcvery similar to Phyllachora and Eury-acliora, and yet in texture of thestroma, and often in the fructification,appear to be more closely allied tothe Dothidcaceae than to any familyof the Discomyccteae. Practically, theonly genus is IlhyUsma, for the sporidiaof so many described species areunknown that no proposals have beenpossible to divide them into genera based upon the fructifi-cation. Such a species as Rhytisma accrinum, which is common
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Keywords: ., bookauthorcookemcm, bookcentury1800, bookdecade1890, bookyear1895
