Groundsel
Groundsel (Senecio vulgaris) is a world-wide annual weed of cultivation. It is very rarely found away from gardens or other areas of regularly disturbed ground. Extremely variable in all it's parts, it's deeply toothed leaves and slightly fleshy stems topped with rayless yellowish capitula and fluffy white seed heads are very familiar to gardeners everywhere. It can grow from seed to seed in only a few weeks and can grow in all types of soils, damp or dry. There are several other species of Groundsel, all of which are somewhat weedy but with usually more attractive flowers as they at least have the ray petals around the edge of the capitulum like most other members of the Daisy family.
Genus: Senecio 
Scientific classification
Kingdom: Plantae Division: Magnoliophyta Class: Magnoliopsida Order: Asterales Family: Asteraceae Genus: Senecio Species: vulgaris Binomial name Senecio vulgaris