Our friend Nancy gave us some salve made up of calendula, plantain and a plant I was unfamiliar with, something I vaguely remembered her referring to as horseweed or fleabane. Actually, I mis-remembered the name as colt’s foot, and then discovered another kind of plant called fleabane, two more actually. All these plants have their uses, but the plant I was looking for had astringent properties–enough to stop bleeding in small cuts. Our salve is for thrashed gardeners’ hands, and I remembered that this …uh…horse…colt…flea…weed…plant was in the salve for that purpose.

This is why scientific names are so important–common names overlap. But thank the good lord for Mr. Google. I found the plant I was looking for: Conyza canadensis, formerly Erigeron canadensis. When I saw the picture, I said, “Oh, you!’ for it is a very common summer sidewalk weed. Recognize it?

Conyza canadensis
(image courtesy of Wikimedia commons)

And along the way I found a charming resource to share with ya’ll: The Gideon Lincecum Virtual Herbarium, a project hosted by the University of Austin, Texas.

Dr. Lincecum was a 19th-century naturalist and “botanic physician” who lived in Mississippi and Texas. This virtual herbarium includes scans of more than 200 pressed specimens of medicinal plants and his hand-written notes on each specimen. The image at top is his note on horse weed.

Here’s another card of his, this one on opium, where he not only condemns the plant, but other physicians for misusing it:

Go take a gander. But just beware it’s a real time suck for plant geeks.