Species Factsheet

Ambrosia artemisiifolia


Complete name: Ambrosia artemisiifolia L.
Taxonomy: Magnoliophyta » Magnoliophyta » Rosopsida » Asterales » Asteraceae » Ambrosia artemisiifolia
Authors: François Bretagnolle and Bruno Chauvel
Last updated: December 12th, 2006

Common Names

Common ragweed, annual ragweed, Roman wormwood, low ragweed, short ragweed, small ragweed, bitterweed, blackweed, American wormwood.


Ambrosia artemisiifolia L.
Ambrosia elatior L.

Short Description

Summer monoecious annual plant 0.2 - 2.5 m tall. The male flowers (2-4mm) are grouped in racemes at the end of branches, while female flowers are located at the bases of upper leaves. It produces a woody reddish-brown indehiscent fruit (akenes) with one seed per fruit, 3-4 mm long. It grows along riverbanks, roadsides, ruderal sites and cultivated fields. It is one of the most allergenic plant species.