(pl. genicula, adj. geniculate) ( Potonié, 1934) A bulge in the equatorial exine of the colpus, often associated with a separation of the sexine from the nexine and the rupturing of the latter. Examples: Fraxinus (Olea ceae), Quercus (Faga- ceae). Comment: If the separation forms a cavity the term fastigium should be applied. See also: fastigium. Germinal aperture ( Wodehouse, 1935) A hole in the furrow membrane through which the pollen tube emerges. Comment: Examples: germ pore (synonym of pore), germinal furrow (synonym of ectocolpus). Synonym of exitus. Goniotreme (adj.) ( Erdtman and Straka, 1961) Synonym of angulaperturate.

Latin geniculare = to flex the knee, hence, a bent knee.