Two Kinds of Mullein

Common mullein in bloom, Aspinwall, 21 July 2021 (photo by Kate St. John)

24 June 2023

Two kinds of mullein are blooming now in western Pennsylvania. Both are native to Eurasia and northern Africa and are listed as invasive in some states, but not in Pennsylvania.

Common mullein (Verbascum thapsus) is hard to miss in late June, standing 5-6 feet tall with a spike of yellow flowers. This hairy biennial plant spends its first year as a rosette of fuzzy basal leaves, similar to the early stage of lamb’s-ear.

Basal rosette of common mullein leaves, April 2016 (photo by Kate St. John)

In the second year it sends up a tall shoot topped by a flower spike.

Common mullein, Ohio River Trail, Pittsburgh, 18 June 2023 (photo by Kate St. John)

As the spikes go to seed in late July you can see why people used these plants as torches.

Common mullein by the river, Pittsburgh, 23 July 2017 (photo by Kate St. John)

Moth mullein (Verbascum blattaria), like common mullein, is also biennial but its flowers are prettier and more delicate.

Moth mullein in bloom, 25 July 2015 (photo by Kate St. John)

The basal leaves are hardly noticeable because the flowers draw so much attention.

Moth mullein basal leaves (photo by Bruce Ackley, Ohio State University via Bugwood.org)

The plant blooms from the bottom up …

Moth mullein, 12 June 2021 (photo by Kate St. John)

… and goes to seed in the same direction. Each seed pod looks like a ball with a string on top.

Moth mullein seed pod, 14 July 2019 (photo by Kate St. John)

Other than its beauty, moth mullein has an unexpected benefit. According to Wikipedia, it has “long been known to be an effective cockroach repellent, and it’s species name blattaria is actually derived from the Latin word for cockroach, blatta.”

Torches and cockroach repellent. Something to think of when you see these two mulleins.

(photo credits are in the captions)

3 thoughts on “Two Kinds of Mullein

  1. Another wonderful lesson about something I knew nothing! Kate, you keep this old brain of mine active and I thank you!!

  2. Mullein also has anti-inflammatory
    properties and can be used as a tea. My husband brews some for me when I get a migraine and it actually helps me.

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