
Tag: smmnjc
conejo valley botanic garden
nature journal club
Pepsis mildei
willow galls

Galls, also known as cecidia, are abnormal swellings that form on the outer tissues of plants, resembling benign tumors or warts in animals. These growths can be triggered by a wide range of parasites, including viruses, fungi, bacteria, other plants, insects, and mites. The scientific study of these structures is called cecidology.
Galls come in many different sizes, shapes and colours; I’m always looking out for them. Our native arroyo willows display at least two different insect-triggered galls. The sawfly/midge lays its eggs under the surface of the leaf/stem. Cecidologists are still trying to figure out how the plant’s genetic instructions cause the responding structures, which provide shelter and food for the insect’s larvae when they hatch.
ways to engage
Anthracobia
Salix lasiolepis

It was so good to meet with SMMNJC again this past weekend. Due to vacation, holidays, and wildfires it had been four months since I’d got to hang out with the gang. We welcomed four newcomers, and all enjoyed our time in the sun. I got curious about the arroyo willow flowers and identified male/female. Did not identify the odd stem growth, but mysteries are OK by me.
Platanus racemosa
Oenothera elata

Oenothera elata (Tall/Hooker’s/Hairy/Western/Marsh Evening Primrose) is a tall biennial native to much of western and central North America, with one or more upright stems bearing a profusion of large bright yellow flowers, 3 in (7 cm) across. I was intrigued to see a bee burrowing deep into the flower’s throat, rather than gathering pollen from the prominent stamens and pistil.







