Fig. 1.
Two cases of congeneric facilitation: (A) Juniperus communis (erect shrub) facilitated by Juniperus sabina (prostrate shrub); (B) Euphorbia balsamifera (dendroid shrub) facilitating Euphorbia canariensis (cactoid shrub).
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.