*School of Plant Morphology, Meerut College, Meerut India.
Floral organogenesis of Echinodorus amazonicus Rataj and floral construction of the Alismatales
Version of Record online: 28 JUN 2008
Botanical Journal of the Linnean Society
Volume 77, Issue 3, pages 141–156, October 1978
How to Cite
SATTLER, R. and SINGH, V. (1978), Floral organogenesis of Echinodorus amazonicus Rataj and floral construction of the Alismatales. Botanical Journal of the Linnean Society, 77: 141–156. doi: 10.1111/j.1095-8339.1978.tb01396.x
- Issue online: 28 JUN 2008
- Version of Record online: 28 JUN 2008
- Accepted for publication April 1978
- floral organogenesis;
- floral construction;
The primary trimerous pattern of the flower of Echinodorus amazonicus Rataj is clearly exhibited in the earliest developmental stages. After the inception of three sepals, theree alternisepalous petal-stamen complexes arise, each of which, at successively higher levels of the primordia, consists of a petal, a pair of stamens, and a single stamen. In alternation with these three petal-stamen complexes three groups of three pistil (carpel) primordia are formed. Subsequent pistil primordia are formed rapidly in alternation with the preceding ones. Teratological buds were observed in which one pistil primordium appeared to be replaced by a normal stamen primordium. General features of the flowers of the Alismatales are summarized in developmental fashion which includes the mature flower as a final stage. With the exception of Limnocharis and probably Wisneria, all alismatalean flowers appear to be characterized by antipetalous stamen (or staminodial) paris. In members studied thus far, the basic trimery differs radically from that found in certain taxa of the Magnoliidae.