Figure 3. Fossil-calibrated molecular chronogram of the family Orchidaceae based on combined matK+rbcL sequences.
Red circles indicate age-constrained nodes, and arrows indicate the crown ages of the five subfamilies of Orchidaceae.
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.