10c, the Pennipollis plant is linked more closely to Ceratophyllum by loss of the bracts subtending the male flowers and introrse
or extrorse rather than latrorse anthers.
inajai, (six in number, with wider filaments at the base; anthers with asymmetrical tips, dorsifixed, and longitudinal in dehiscence, introrse
) are confirmed with the observations in species of the genera Pelagodoxa and Sommieria (Stauffer et al., 2004), Astrocaryum (Bacelar-Lima et al., 2006), Licitala (Stauffer et al., 2009).
Stamens number eight to twelve, are opposite the sepals and petals, and have introrse
, dorsifixed anthers that dehisce by longitudinal slits.
At maturity, a cyperaceous stamen consists of a stretched filament and a basifixed, introrse
anther with two thecae, each with a longitudinal stomium between the two pollen sacs.
Anthers with introrse
dehiscence, normally lacking caudate apical appendages (but large, flat, apical appendages present in Vinca) 7 7.