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.
Flowers of C. emerus. (a) Front view of the flower with the wings-keel complex. Red nectar guides converging in the claw are evident on the standard petal. (b) Lateral view of the flower. The arrow indicates the standard claw. The arrowhead points to the cylindrical part of the keel.
