Antheridia in an oval or obcordate disk immersed in the apex of the thallus.
Sometimes they are umbilicate below, so that a vertical section would be obcordate.
obcordate: inversely heart-shaped, with the point applied to the base of another object or part.
Also another Hibiscus, with obcordate tomentose leaves, and pink flowers; both these last were very handsome shrubs.
Owing to the rotation of the posterior loph, the apex of the obcordate tooth is at its lingual side.
There are fine, spreading hairs on the leafstalks, and the leaflets are obcordate and toothed.
The most remarkable modification of M3 in Cratogeomys is the obcordate pattern developed in P. merriami of the castanops-group.
Each petal has its tip inflexed, giving it an obcordate appearance.