. Carnegie Institution of Washington publication. 1% THE MARATTIALES Forms of Angiopteris occur from Polynesia to Madagascai and northward as far as the Himalayas. The genus also occurs in northern Australia. The anatomy of the adult plant has been investigated more thoroughly than that of any other member of the Marattiacese. I he mosl recent account of the anatonn is thai given by Miss Shove (Shove I), while Farmer and I fill have care- fully investigated the vascular system of the young sporophyte. A number of prep- arations wire made by the writer for the purposes of comparison with the ot
. Carnegie Institution of Washington publication. 1% THE MARATTIALES Forms of Angiopteris occur from Polynesia to Madagascai and northward as far as the Himalayas. The genus also occurs in northern Australia. The anatomy of the adult plant has been investigated more thoroughly than that of any other member of the Marattiacese. I he mosl recent account of the anatonn is thai given by Miss Shove (Shove I), while Farmer and I fill have care- fully investigated the vascular system of the young sporophyte. A number of prep- arations wire made by the writer for the purposes of comparison with the othei genera, hut no attempt was made to follow oul in detail the extremely complicated vascular skeleton of the adult sporophyte. Farmer and llill (Farmer3) have given a detailed account of the development of the vascular system in the young sporo- phyte of Angiopteris, so that it was not thought necessary to make a large number of preparations of this species, the material of which was collected at the same place where Farmer obtained his plants. However, as these authors did not trace the development of the young bundles from the apical meristem, it seemed worth while to examine this point for the purpose of supplementing their account based upon the study of the tullv developed vascular Fui. 178.—Four longitudinal sections of a young sporophyte of An^iopttris. The vascular system begins, as was recognized by Farmer in an earlier papei (Farmer I), as a single strand connecting the root and cotyledon, exactly as is the case in the other Marattiace;e. In the further study of the development of the vascular skel- eton Farmer and Hill employed the method of constructing a model of the vascular system, built up of superimposed sheets of wax, corresponding with the outline of the vascular bundles seen in the serial sections. The figures which they give, drawn from such models, show very clearly the relation of the vascular strands which make up the complicated skeleton
Size: 1868px × 1337px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1910, bookyear1911
