Latin name: Sonchus oleraceae
	Family: Asteraceae
	Common name: Annual sowthistle
	Life cycle: annual, spreads by seed
	Habit: initially a rosette, then upright and columnar
	Foliage: Cauline foliage is deltoid in shape, clasps the stem, and has shallow pointed lobes. Despite its appearance, it is not prickly or spiny, and does not hurt to touch or squeeze.
	Flowers: Flower heads occur in clusters and are composed of yellow ray flowers.
	Notes: This is a very common species in Oregon field nurseries, and is becoming more common in container crops. Seed are air-borne, thus local sanitation around the nursery is imperative for effective control.

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