Tobe & Raven, Embryology of Onagraceae (Myrtales) 
673 
by looking at periclinal divisions of several hypodermal archesporial cells that give 
rise to the primary parietal and the sporogenous cells (Figs 7, 8: Fuchsia mdicans). 
Most earlier authors have not specified the number of archesporial cells, but have 
implied that the archesporium is one-celled (see Davis 1966; Seshavataram 1970). 
Nevertheless, the occurrence of a multi-celled archesporium has occasionally been 
reported in various species and genera of Onagraceae, although without reference to 
Figs 7 and 8. Longitudinal sections of two young ovules of Fuchsia radicans showing a multi-celled 
archesporium. Plural archesporial cells (ac) are differentiated, and most of them divide periclinally 
to give rise to the primary parietal cell (pp) and the sporogenous cell (s). Scales equal 20 |im. 
