Rorippa palustris
Encyclopedia
Rorippa palustris is a species of flowering plant in the mustard family
known by the common names bog yellowcress and marsh cress. It is native to many parts of Europe, Asia, North Africa, and North America, and it can be found in many other parts of the world as an introduced species
and a common weed, for example, in Australia
and South America
. It is an adaptable plant which grows in many types of damp, wet, and aquatic habitat. It is variable in appearance as well. It may be annual or perennial, producing an erect stem, sometimes with branches, attaining a maximum height just over one meter. The leaves are up to 30 centimeters long and have toothed to deeply lobed edges. The inflorescence
is a raceme
of mustardlike flowers with spoon-shaped yellow petals each a few millimeters in length. The fruit is a silicle
up to a centimeter long and containing minute seeds.
Brassicaceae
Brassicaceae, a medium sized and economically important family of flowering plants , are informally known as the mustards, mustard flowers, the crucifers or the cabbage family....
known by the common names bog yellowcress and marsh cress. It is native to many parts of Europe, Asia, North Africa, and North America, and it can be found 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 weed, for example, in Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
and South America
South America
South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...
. It is an adaptable plant which grows in many types of damp, wet, and aquatic habitat. It is variable in appearance as well. It may be annual or perennial, producing an erect stem, sometimes with branches, attaining a maximum height just over one meter. The leaves are up to 30 centimeters long and have toothed to deeply lobed edges. 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...
is 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...
of mustardlike flowers with spoon-shaped yellow petals each a few millimeters in length. The fruit is a silicle
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 a centimeter long and containing minute seeds.