A Dictionary of the Flowering Plants and Ferns
Key to the families of flowering plants. System of bentham and hooker. Table of family equivalents. Index to orders and groups of higher rank.Two interesting modifications of the life cycle as above described are known. ... Filix-mas, Aspidium falcatum and Todea africana, there occurs apogamy or the omission of the sexual process from the life-history (see diagram in Pteri- dophyta ).
| Title | : | A Dictionary of the Flowering Plants and Ferns |
| Author | : | John Christopher Willis, Herbert Kenneth Airy Shaw |
| Publisher | : | CUP Archive - 1973 |
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