Plant Wiki

The open plant encyclopedia

Know any plant.
Grow it well.

Snap a photo or search by any name to see how to care for it, where it comes from, whether it's safe, and a 3D model you can turn.

  • 13,000+plants with full pages
  • 365,000+plant species worldwide
  • 220+countries covered

Common in

See all

The plants people record most in your country, and ones that grow there wild.

What do you want to do?

Popular plants

Browse all plants

See them in 3D

All plants in 3D

Browse plants

Filter by what you want to do, shape, origin, country, care and safety.

Plant Wiki › Browse plants

Madagascar ragwort

Senecio madagascariensis

Also called Fireweed, Madagascar Fireweed, Madagascar Groundsel

Madagascar ragwort
Photo: John Tann from Sydney, Australia, CC BY 2.0

Madagascar ragwort is a small yellow daisy-like annual or short-lived herb, a weed of pastures, roadsides and disturbed ground in warm climates. It is grown only as a weed, not as an ornamental, and it is poisonous to livestock.

Family
Asteraceae (Daisy family)
Grows as
Annual
Light
Full sun
Water
Tolerates dry spells; it needs moisture mainly to establish from seed.
Soil
Almost any soil, including disturbed and poor ground.
Temperature
Subtropical and warm temperate climates; cold-sensitive, frost-killed in winter.
How easy
Easy
Safety
Toxic: Contains pyrrolizidine alkaloids that damage the liver; the whole plant is poisonous.
Native range
Zimbabwe to S. Africa, Madagascar
Climate
subtropical

About

Senecio madagascariensis, also known as Madagascar ragwort, is a species of the genus Senecio and family Asteraceae that is native to Southern Africa. Other common names include Madagascar groundsel and fireweed. It has been included on the noxious weeds list for Hawaii

and the reject list for Australia.

Safety

Senecio madagascariensis contains pyrrolizidine alkaloids and is poisonous. Horses, cattle, and other livestock are at risk.

Symptoms of poisoning from fireweed include gradual weight loss, jaundice, fluid in the lungs, blindness, sudden death without any other indications, aimless wandering, muscular coordination, twitching of the head muscles, abdominal straining, rectal prolapse, and irritability.

Where it grows

It is found in pastures, open woodlands, grasslands, suburban bushland, roadsides, disturbed sites, wastelands, parks and coastal environments in subtropical and warmer temperate regions.

Other Senecio plants

Creeping groundsel · Lavender Steps · Vertical Leaf · Canary Creeper · Threadleaf ragwort · Fireweed groundsel · Natal Ivy · Curio × peregrinus · Climbing Senecio · Canary Ragwort · Senecio tropaeolifolius · Groundsel

Text excerpted from the Wikipedia article Senecio madagascariensis by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

Credits & terms

Identify a plant

Point at a leaf or flower and snap. One plant in frame works best.

Your photo
Starting camera…