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The present work incorporates the results of anatomical studies on eight members of Aizoaceae. The nodal configurations are: (1) unilacunar one trace-Mollugo cerviana, M. nudicaulis, Gisekia pharnaceoides, Glinus lotoides andOrygia decumbens; (2) unilacunar two trace—Trianthema triquetra; (3) trilacunar three trace-Zaleya govindia andTrianthema portulacastrum. In a reinvestigation of the general vegetative structure, normal secondary growth has been found to occur inGisekia andMollugo and anomalous secondary growth in the species ofTrianthema, Zaleya, Orygia andGlinus. The abnormal secondary growth met with in roots may be attributed to the perennating habit of these plants. A unique type of secondary xylem arrangement in the form of a spiral occurs in certain roots ofZaleya andTrianthema. An explanation of its origin has been given. |
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