California buckwheat (Eriogonum fasciculatum), growing along Poopout Trail, Dalton Ridge, front range of the San Gabriel Mountains. This individual with some sort of stem deformity on one inflorescence stalk, flattened into a broad, curved shaped. Coin used for scale is a US quarter dollar (¢25 piece), 24.26 mm, 0.955 inch in diameter.
Nuttall’s with Fasciation!
“A malformation of plant stems commonly appearing as enlargement and flattening as if several stems were fused is called fasciation.”
Host: Canyon Live Oak (Quercus chrysolepis)
Host observation:
https://www.inaturalist.org/observations/200349899
Found growing in a bed of Acer macrophyllum leaves up Arroyo Aguague. Larger individuals can be found growing near seeps where Woodwardia fimbriata was also found.
Gall On a Coast Live Oak: Collected. Will Add picture of adult here once it emerges.