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) Cabernet Sauvignon, b) Carménère, c) Chardonnay, d) Malbec, e) Merlot and f) Syrah. Samples were visualized at 40X magnification. Abnormal pollen grains are pointed by arrowheads.
