Cronquist, Arthur Formerly, New York Botanical Garden, New York, New York.
- Additional Readings
One of the two commonly recognized subkingdoms of plants. In contrast to the more closely knit subkingdom Embryobionta, the Thallobionta (also called Thallophyta) are diverse in pigmentation, food reserves, cell-wall structure, and flagellar structure. They still form a natural group, however, in that they are all probably derived from ancestors which would be referred to the Thallobionta, without the intervention of any ancestors which would have to be referred to other groups. The Thallobionta are here considered to include seven divisions, the Rhodophyta, Chlorophyta, Euglenophyta, Pyrrophyta, Chrysophyta, Phaeophyta, and Fungi. All these groups have both modern and fossil representatives.
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