Information on Weld

Common Name: Weld
Scientific Name: Reseda luteola
Irish Name: Buí mór
Family Group: Resedaceae
Distribution: View Map (Courtesy of the BSBI)
Flowering Period

Click for list of all flowering by month
Weld is not easily confused with other wild plants on this web site.

Commonly seen along our motorways and in dry, lime-rich disturbed ground, this is a tall biennial which reaches over 1 metre high.  It has small yellow-green flowers (4-5mm across) which are borne in long, dense, tapering spikes on hollow stems in the plant's second year.  Each little flower has 4 divided petals, 4 sepals and blooms from June to August.  The leaves are narrow and in the first year of the plant's life they form a basal rosette; in the second year there are lanceolate stem leaves with wavy edges.  This is a native wildflower and it belongs to the family Resedaceae.  

While waiting for a train at Dalkey Railway Station, Co Dublin in 2007 I saw this plant and  wondered what it was. I came back shortly afterwards, recorded it and photographed it.   

If you are satisfied you have correctly identified this plant, please submit your sighting to the National Biodiversity Data Centre

Also known as Yellow-weed and Dyer's Rocket, in earlier times the roots of this plant were used to manufacture a bright yellow dye.