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.
Persistent and changing characters in pollen of primitive and more evolved orchids (characters common to early and evolved orchids are presumed to be neotenic)
* Elastoviscin engulfs monad pollen of Cypripedium acaule (Burns‐Balogh and Hesse, 1988) and Apostasia wallachii (Schill and Wolter, 1986).
