[Wikipedia] Mediterranean native, Description: Centaurea diffusa, also known as diffuse knapweed, white knapweed or tumble knapweed, is a member of the genus Centaurea in the family Asteraceae. This species is common throughout western North America but is not actually native to the North American continent, but to the eastern Mediterranean.
Diffuse knapweed is an annual or biennial plant, generally growing to between 10 and 60 cm in height. It has a highly branched stem and a large taproot, as well as a basal rosette of leaves with smaller leaves alternating on the upright stems. Flowers are usually white or pink and grow out of urn-shaped heads carried at the tips of the many branches. Diffuse knapweed often assumes a short rosette form for one year, reaching maximum size, then rapidly growing and flowering during the second year. A single plant can produce approximately 18,000 seeds (contributed by Mary Ann Machi)
/app/up/mg/392/th/mg117819-0.jpg?a:!/app/up/mg/391/th/mg117529-1.jpg:!/app/up/mg/295/th/mg88715-0.jpg:!/app/up/io/279/th/io83750-0.jpg:!/app/up/io/18/th/io5525-1.jpg:!/app/up/io/18/th/io5525-2.jpg:!0175 3301 2288 0033:!0000 0000 0912 1554:!/app/up/cbo/260/th/78019.jpg:!/app/up/entry/457/th/137312.jpg:!0175 3301 3808 0060:!
2020 Catherine Talbot:!2020 Friends of Five Creeks volunteers:!2019 Catherine Talbot:!2023 Justice Rasmussen:!2018 Joe Woods:!2018 Joe Woods:!2001 CDFA:!2012 Jean Pawek:!2017 Ramona Robison:!2022 John Millsaps:!2001 CDFA:!
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals.
[web application]. 2023. Berkeley, California:The Calflora Database
[a non-profit organization].Available: