Leaves
Leaf or leaflet 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 . |  |
apiculate | More than 3:1 l/w, usually slightly curled and flexuous. |  |
aristate | More than 3:1 l/w, usually prolonged, straight and stiff. |  |
caudate | Acuminate with concave margins. |  |
cirrhous | More than 10:1 l/w, coiled and flexuous. |  |
cleft | Lobe rounded; sinus depth 1/4-1/2 distance to midpoint of blade; margins convex and/or straight. |  |
cuspidate | Acute but coriaceous and stiff. |  |
emarginate | Lobe rounded; sinus depth 1/16-1/8 distance to midpoint of blade; margins straight or convex. |  |
mucronate | Less than 3:1 l/w, straight and stiff. |  |
mucronulate | 1:1 l/w or broader than long; straight. |  |
obcordate | Lobe rounded; sinus depth 1/8-1/4 distance to midpoint of blade; margins convex and/or straight. |  |
obtuse | Margins straight to convex, forming a terminal angle more than 90 . |  |
retuse | Lobe rounded; sinus depth to 1/16 distance to midpoint of blade; margins convex. |  |
rounded | Margins and apex forming a smooth arc. |  |
spinose or pungent | Acuminate but coriaceous and stiff. |  |
truncate | Cut straight across; ending abruptly almost at right angles to midrib or midvein. |  |