
%0 Journal Article
%A Prakash, N 
%A Foreman, DB 
%A Griffith, SJ 
%T Gametogenesis in <I>Galbulimima belgraveana</I> (Himantandraceae)
%J Australian Journal of Botany
%D 1984/12/01
%V 32
%N 6
%P 605-612
%K 
%R https://doi.org/10.1071/BT9840605
%U https://www.publish.csiro.au/paper/BT9840605 
%X The flowers of Galbulimima belgraveana (F. Muell.) Sprague are bisexual, calyptrate and protogynous. The numerous free stamens are laminar and arranged spirally on an elongated receptacle; only the middle stamens are fertile. There are four microsporangia embedded on the abaxial side of the microsporophyll. The tapetum is secretory and often double. A variety of spore tetrad types is produced. The mature pollen grains are single, monosulcate, scabrate, atectate, spheroidal and 2-celled. The carpels of a flower are initially free but later become concrescent so that a single fruit is formed. The ovules are anatropous, crassinucellar and bitegminal, and show an elongated embryo sac that conforms to the polygonum type of development. There is a massive parietal tissue in early stages of ovule development. In its embryological features, the species shows close relationships to the families Annonaceae and Degeneriaceae and, to a slightly lesser extent, the Magnoliaceae and Eupomatiaceae. 
