Scientific NameHolosteum umbellatum
Synonyms (former Scientific Names):
Holosteum umbellatum ssp. umbellatum
Jagged Chickweed is a winter/spring annual that is relatively small, but branches many times from the base. The stems may be standing up or on the ground. It has a fibrous root system and spreads by self-seeding.
Basal leaves of Jagged Chickweed are typically no bigger than 2" (50mm) long and 1/2" (12mm) wide and oblanceolate. Leaves on the stem are arranged opposite each other and are no bigger than 1 inch (25mm) long and 1/4 inch (6mm) wide. They are mostly free of hair, sometimes hair can be seen on margins. The leaves are blue/grey green (unlike other chickweeds). Each stem ends in a flower head.
The plant does not usually get longer than 3-8" (76-203mm) long. Hair can be seen on the stem but not typically on the leaves, only sometimes on the margins. After blooming, the plant will dry out and appear straw like. The flower tips are jagged.
Flower Seed Head
Flowers are found on each stem and bloom at different times, typically in mid spring. It is commonly one of the first to bloom. They are about 1/4 inch (6mm) wide with 5 petals, 5 narrow/oval sepals, 3-5 states, and 5 styles. It should be noted that the petals are narrow and have jagged tips.
Seed are in capsules that are ribbed/cylindrical, with the tops open where 6 teeth can be seen. The seeds themselves can be seen as rectangular with an indent in the center.
It can be found in fields or in residential areas.
upright and nonwoody,
prostrate and nonwoody
Thorns or Spines
Approximate Flower Diameter
Dominant Flower Color
shorter than leaf
Stem Cross Section
round or oval