EARLY FLORAL DEVELOPMENT OF LYTHRUM SALICARIA
- 1 September 1967
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Botany
- Vol. 45 (9), 1609-1618
- https://doi.org/10.1139/b67-167
Abstract
The primordia of the six whorls of floral organs are initiated in the following sequence: (1), inner sepals; (2), outer sepals; (3), outer stamens; (4), gynoecium; (5), inner stamens; and (6), petals. This sequence of initiation has not been reported thus far for any species of vascular plants. Its relevance to present theories of the "flower" and floral apices is discussed. The inflorescence and floral apices have a tunica-corpus organization. The tunica is biseriate or uniseriate depending on the stage of development. Bracts, sepals, petals, stamens, and pistil wall originate from periclinal divisions in the T2layer. In contrast, the floral apices originate from periclinal divisions in the outer corpus layer and the T2layer. Procambial development is acropetal. Soon after the procambial cells are clearly discernible they seem to form a cylinder which at one level gives off 12 strands to the two whorls of sepals. At a higher level the procambial cylinder gives off four procambial strands which enter the pistil wall. The procambial strands of the stamens and petals are attached to the strands of the inner and outer sepals. The histogenetic results including procambial development are discussed in relation to some general principles of histogenesis and procambial formation.This publication has 10 references indexed in Scilit:
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