Pycnanthemum - Species Dictionary - Global : iSpot Nature - Your place to share nature. iSpot is a website aimed at helping anyone identify anything in nature. Once you've registered, you can add an observation to the website and suggest an identification yourself or see if anyone else can identify it for you.

Catalogue of Life
Plantae, Tracheophyta, Magnoliopsida, Lamiales, Lamiaceae, Pycnanthemum
Pycnanthemum verticillatum, Pycnanthemum muticum, Pycnanthemum torrei, Pycnanthemum monotrichum, Pycnanthemum montanum, Pycnanthemum nudum, Pycnanthemum loomisii, Pycnanthemum pilosum, Pycnanthemum setosum, Pycnanthemum tenuifolium, Pycnanthemum incanum, Pycnanthemum curvipes, Pycnanthemum floridanum, Pycnanthemum albescens, Pycnanthemum clinopodioides, Pycnanthemum flexuosum, Pycnanthemum beadlei, Pycnanthemum virginianum, Pycnanthemum pycnanthemoides, Pycnanthemum californicum