
TY  - JOUR
A1  - Prakash, N 
A1  - Foreman, DB 
A1  - Griffith, SJ 
T1  - Gametogenesis in <I>Galbulimima belgraveana</I> (Himantandraceae)
JF  - Australian Journal of Botany
JO  - Aust. J. Bot.
Y1  - 1984
VL  - 32
IS  - 6
SP  - 605
EP  - 612
KW  - 
UR  - https://doi.org/10.1071/BT9840605 
N2  - 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. 
ER  -

