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Protocols in ecological and environmental plant physiology


Article     |     Next >>   Contents Vol 30(3)

Biology of Australian seagrasses: Floral development and morphology in Amphibolis (Cymodoceaceae)

CA McConchie, SC Ducker and RB Knox

Australian Journal of Botany 30(3) 251 - 264
Published: 1982


Floral development of male and female flowers in Amphibolis antarctica and A. griffithii was followed from the initiation of the floral meristem to the mature flower. In A. antarctica the flowers form on lateral branches, while in A. griffithii they may also develop terminally on an upright branch from the rhizome. A. griffithii and. to a lesser extent, A. antarctica, show sympodial branching from the floral axis. The female flower develops from a pair of primordia; in A. griffithii these primordia each develop three stigmas, which in A. antarctica subsequently may form secondary branches. The. ovary wall bears the initials of the future grappling apparatus, comprising four comb initials in A. grijjjthii and a further inner set of horns in A. antarctica. The female flowers of Amphibolis are unique amongst the members of the Cymodoceaceae in being subtended by a bract or perianth, similar to the male flowers. Differences between the floral vasculature and intravaginal squamulae are presented for both species.

Full text doi:10.1071/BT9820251

© CSIRO 1982

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