Torreya
Torreya
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In our eReader you can find the full English version of the book. Read Torreya Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Torreya
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L. Lyon * noted a considerable difference in the development of the young sporophyte of B, obliquum on the one hand, and of B, simplex, B, neglectiim^ and B, virginianum on the other. This difference is interesting, but it cannot be con- sidered of value, even to separate the groups, unless it is shown to be constant for other and diverse species in both groups.
Two other groupings of the species have been made. Milde recognized two subgenera, Eubotrychium and Osmundopteris, The latter included... only B, virginianum^ and was based on a very artificial character, the fact that in this species, the bud-sheath is partly open. Prantl divided the genus into groups nearly like those used here, but differed in placing B. virginianum with B.
ternatum and others of that type to form his subgenus Phyllo- trychium^ of which the principal distinctive character is the pos- session of a hairy bud. But B, virginianum seems to find its closest affinities with B, lanceolatum, and it is more reasonable to suppose that it represents an extreme development of this type than to relate it to the much more different B, ternatum group.
What to read after Torreya?
You can find similar books in the "Read Also" column, or choose other free books by Torrey Botanical Club to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
L. Lyon * noted a considerable difference in the development of the young sporophyte of B, obliquum on the one hand, and of B, simplex, B, neglectiim^ and B, virginianum on the other. This difference is interesting, but it cannot be con- sidered of value, even to separate the groups, unless it is shown to be constant for other and diverse species in both groups.
Two other groupings of the species have been made. Milde recognized two subgenera, Eubotrychium and Osmundopteris, The latter included... only B, virginianum^ and was based on a very artificial character, the fact that in this species, the bud-sheath is partly open. Prantl divided the genus into groups nearly like those used here, but differed in placing B. virginianum with B.
ternatum and others of that type to form his subgenus Phyllo- trychium^ of which the principal distinctive character is the pos- session of a hairy bud. But B, virginianum seems to find its closest affinities with B, lanceolatum, and it is more reasonable to suppose that it represents an extreme development of this type than to relate it to the much more different B, ternatum group.
What to read after Torreya?
You can find similar books in the "Read Also" column, or choose other free books by Torrey Botanical Club to read onlineMoreLess
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