This specimen found in Phoenix, Arizona on 20 March 2008 was imaged using a flat-bed scanner.
SPRING ANNUAL: Tall, weedy annual growing quickly after favorable
winter/spring rains blooming from January to April.
After a wetter than average spring many London Rocket plants were found with this fungal pathogen, Leptosphaeria maculans, growing on the undersurface of the leaves. The hyphae form irregularly shaped white spots. Phoenix, Arizona, March 9, 2017. This same fungus can affect cultivated mustards and coles.
Brassicaceae -- Mustard Family
Desert Field Guide
Sonoran Desert Places
Sonoran Desert Naturalist Home Page
Michael J. Plagens, page created 21 March 2008,
updated 9 March 2017.