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.
LM (A) and SEM (B–I) micrographs of Passovia pyrifolia (MO: from Peru, coll. R. Várgez & N. Jaramillo, s.n.). A. Two pollen grains in equatorial and polar view. B–E. Pollen grains in polar view. F. Close-up of central polar area. G. Close-up of apex. H, I. Close-ups of mesocolpium. Scale bars – 10 µm (A–E), 1 µm (F–I).
