Flowers
petal apex
The tip of a two-dimensional structure which is usually bounded by the upper 5-10% of the margins; or the top of a three-dimensional structure.
acuminate | Margins straight to convex forming a terminal angle of less than 45 . |  |
acute | Margins straight to convex forming a terminal angle 45 -90 . |  |
emarginate | Lobe rounded; sinus depth 1/16-1/8 distance to midpoint of blade; margins straight or convex. |  |
not useful | ||
rounded | Margins and apex forming a smooth arc. |  |
truncate | Cut straight across; ending abruptly almost at right angles to midrib or midvein. |  |