Telome theory pteridphytes, Study notes of Botany and Agronomy

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FIG. 19.13 Zimmermann's Telome concept. A, illustrates hypothesis of telomes and mesomes; B, overtopping-two sister branches of a dichotomy become unequal, the stronger one forms the axis, the weaker one is pushed aside and forms the leaf; C, planation- branching in more than one plane is being replaced by a dichotomy ina single plane, thus arranging the telomes and mesomes in a plane; D-E, webbing and syngenesis- the telomes and mesomes, become connected by the formation of parenchymatous tissue between them (parenchymatous webbing); this is accompanied by the fusion of their steles also. Fertile Telome F : Is. 19.14 Diagram of the organization in a theoretically primitive vascular plant showing a body built of telame and mesome limbs, the telomes being both fertile and sterile. (After Zimmermann). Scanned by CamScanner