Erysimum repandum
Encyclopedia
Erysimum repandum is a species of wallflower
known by several common names, including spreading wallflower, bushy wallflower, and treacle mustard.
It is native to Eurasia but it is known in many other parts of the world as an introduced species
and a common roadside weed.
This is an annual herb growing up to about half a meter high. The leaves at the base of the stem are widely lance-shaped, bumpy or toothed along the edges, and up to 15 centimeters long. The leaves farther up the stem are shorter, narrower, and more shallowly lobed or unlobed. The top of the stem is occupied by a raceme
inflorescence
of many yellow flowers. The fruit is a silique
up to 10 centimeters long.
Wallflower
Erysimum is a genus that includes about 180 species, both popular garden plants and many wild forms. The genus Cheiranthus is sometimes included herein whole or in part. Erysimum has recently adscribed to a monogeneric cruciferous tribe, Erysimeae...
known by several common names, including spreading wallflower, bushy wallflower, and treacle mustard.
It is native to Eurasia but it is known in many other parts of the world as an introduced species
Introduced species
An introduced species — or neozoon, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its indigenous or native distributional range, and has arrived in an ecosystem or plant community by human activity, either deliberate or accidental...
and a common roadside weed.
This is an annual herb growing up to about half a meter high. The leaves at the base of the stem are widely lance-shaped, bumpy or toothed along the edges, and up to 15 centimeters long. The leaves farther up the stem are shorter, narrower, and more shallowly lobed or unlobed. The top of the stem is occupied by a raceme
Raceme
A raceme is a type of inflorescence that is unbranched and indeterminate and bears pedicellate flowers — flowers having short floral stalks called pedicels — along the axis. In botany, axis means a shoot, in this case one bearing the flowers. In a raceme, the oldest flowers are borne...
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...
of many yellow flowers. The fruit is a silique
Silique
A silique or siliqua is a fruit of 2 fused carpels with the length being more than three times the width. The outer walls of the ovary usually separate when ripe, leaving a persistent partition...
up to 10 centimeters long.