What’s That? January 26, 2025

Today, I noticed these seed pods wrapped around a tree branch. What plant are they from? They are the fruit from wild yam (Dioscorea villosa). Here is a closer look. I’ll go back in the spring to see if I can get a picture of the leaves and flowers. Have you seen wild yam?

What’s That? March 10, 2025

While walking on the Crabtree Creek Greenway this weekend, we happened to look up as we were walking under the Route 54 bridge. What is that? It looks like organ pipes made out of mud. That is the nest of the Organ Pipe Mud-dauber wasp (Trypoxylon politum).

What’s That? March 23, 2024

Have you ever noticed a green slime or jelly like substance on the ground after the rain? What is that? It’s Nostoc commune, or star jelly. It is not a plant. Nostoc commune is a special kind of bacteria called cyanobacteria. Regular bacteria use food to get their energy, while cyanobacteria use light to produce… Continue reading What’s That? March 23, 2024

What’s That? May 20, 2025

What are these purple and white spots on the goldenrod leaves? They are caused by a bug, a goldenrod gall midge called Asteromyia carbonifera. The bugs carry a fungus (Botryosphaeria dothidea) that protect their larvae from parasitoids. The female Asteromyia lay eggs and deposit the fungus along with the eggs on the goldenrod leaves. The… Continue reading What’s That? May 20, 2025

What’s That? May 6, 2024

What’s that? It looks like someone sprayed the blackberry plants with bright orange spray paint. Unfortunately, it isn’t paint. This is a fungal infection known as orange rust. It is two fungal species, Arthuriomyces peckianus and Gymnoconia nitens. Orange rust fungus infects the entire plant: the roots, crown and shoots. This fungus doesn’t usually kill… Continue reading What’s That? May 6, 2024