. Introduction to the study of fungi; their organography, classification, and distribution, for the use of collectors. Fungi. 246 INTRODUCTION TO THE STUDY OF FUNGI. developed on Berberis vulgaris, but no corresponding uredo- spores or teleutospores upon that plant, and therefore they have to be sought elsewhere (Fig. 117). On the other hand, the uredospores and teleutospores of Puccinia graminis nourish on wheat and other grasses, whilst no spermogonia or aecidia have been known to infest the latter plants. Hence it is con- cluded that the above form the normal series, with the spermogonia an
. Introduction to the study of fungi; their organography, classification, and distribution, for the use of collectors. Fungi. 246 INTRODUCTION TO THE STUDY OF FUNGI. developed on Berberis vulgaris, but no corresponding uredo- spores or teleutospores upon that plant, and therefore they have to be sought elsewhere (Fig. 117). On the other hand, the uredospores and teleutospores of Puccinia graminis nourish on wheat and other grasses, whilst no spermogonia or aecidia have been known to infest the latter plants. Hence it is con- cluded that the above form the normal series, with the spermogonia and aecidia on the berberry, and the uredospores and teleuto- spores on wheat, which completes the cycle. LV-^/ J This theory is supported by the contention hV^-' that the germinating spores of Aecidium berberidis are capable of producing Puccinia Fia. 117.âAecidiospore graminis by artificial inoculation on wheat; in germination. After n . . â Tll]aane and conversely the promycelial spores 01 Puccinia graminis (Fig 118) may be used to inoculate the leaves of the berberry, and produce thereon Aecidium berberidis. This is the theory and its application, which we will here leave as it stands. In another group, the Brachy - pucciniae, spermogonia, uredospores, and teleutospores are found on the same species of plant, but the aecidia are unknown. To this succeeds the Hemi-puccinia, in which uredospores and teleuto- spores occur on the same plant, but the spermogonia and aecidia are unknown. It is here that the sceptics would place Puccinia graminis were they not debarred Fl0. !BMa teleutospore by the anathemas of the votaries germinating and producing pro- j, TT , . TT -. j. â ,, mycelial spores. After Tulasne. or Heteroecism. Hereafter follows the group Pucciniopsis, in which spermogonia, aecidia, and teleutospores have been recognised, but not uredospores, so that in this group of species the uredo stage is deficient. Of the two remaining groups, Micro-pucciniae includes t
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