Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(A) Habit showing the domatium. (B, C) Successive stages of flower bud opening, showing the corolla tube elongation. (D) Open corolla tube with the four squamellae. (E) Fruit with a bilobed-quadrangular shape in cross section. (F) Leaf, showing the festooned brochidromous venation (connecting to other secondary veins via multiple loops and not reaching the margin).
