Ammannia robusta
Encyclopedia
Ammannia robusta is a species of flowering plant
in the loosestrife family
known by the common name grand redstem. It is native to most of western and central North America, where it grows in moist places, such as ditches and pond margins. It is an annual herb reaching about a meter in maximum height when growing erect. The leaves are up to 8 centimeters long and linear to lance-shaped. The leaves and stem are green to red in color. The inflorescence
s are clusters of up to five flowers in the leaf axils. The flowers are urn-shaped with light lavender petals about half a centimeter long and protruding stamen
s with yellow anthers. The fruit is a spherical capsule about half a centimeter wide containing several tiny seeds.
Flowering plant
The flowering plants , also known as Angiospermae or Magnoliophyta, are the most diverse group of land plants. Angiosperms are seed-producing plants like the gymnosperms and can be distinguished from the gymnosperms by a series of synapomorphies...
in the loosestrife family
Lythraceae
Lythraceae are a family of flowering plants. It includes about 620 species of mostly herbs, with some shrubs and trees, in 31 genera. Major genera include Cuphea , Lagerstroemia , Nesaea , Rotala , and Lythrum...
known by the common name grand redstem. It is native to most of western and central North America, where it grows in moist places, such as ditches and pond margins. It is an annual herb reaching about a meter in maximum height when growing erect. The leaves are up to 8 centimeters long and linear to lance-shaped. The leaves and stem are green to red in color. The inflorescence
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...
s are clusters of up to five flowers in the leaf axils. The flowers are urn-shaped with light lavender petals about half a centimeter long and protruding stamen
Stamen
The stamen is the pollen producing reproductive organ of a flower...
s with yellow anthers. The fruit is a spherical capsule about half a centimeter wide containing several tiny seeds.