BugwoodWiki Article

Madagascar ragwort
Senecio madagascariensis Poir.

Overview

Appearance
Senecio madagascariensis is an annual or biennial herb that can grow up to 23.6 in. (60 cm) tall.
Foliage
Leaves are alternate, up to 4.7 in. (12 cm) long, and bright green. Cauline leaves are linear to lanceolate with an acute apex, denticulate margins, and can be petiolate, subsessile, or sessile.
Flowers
The small flower heads are 0.5-1 in. (12-25 mm) in diameter. Involucral bracts are acute, glabrous, and 0.16-0.24 (4-6 mm) long. Outer bracts are lanceolate, acute, purple tinged, and 0.04-0.08 (1-2 mm) long. Ray florets are yellow and 0.3-0.6 in. (8-14 mm) long. Disk florets are perfect and yellow as well.
Fruit
Fruits are 0.06-0.09 in. (1.4-2.2 mm) long, 9 to 10 ribbed, and pubescent between ribs. Seeds are white and 2 to 3 times as long as the fruit.
Ecological Threat
Senecio madagascariensis can be found in a wide variety of habitats but prefers fertile, well-drained, disturbed soils. It is considered native to southern Africa and Madagascar.

Selected Images


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5414065

Madagascar ragwort
Senecio madagascariensis
Plant(s)
Forest and Kim Starr
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Madagascar ragwort
Senecio madagascariensis
Plant(s)
Forest and Kim Starr
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5421222

Madagascar ragwort
Senecio madagascariensis
Flower(s)
Forest and Kim Starr
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5390347

Madagascar ragwort
Senecio madagascariensis
Foliage
Forest and Kim Starr
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Madagascar ragwort
Senecio madagascariensis
Plant(s)
Forest and Kim Starr
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5421722

Madagascar ragwort
Senecio madagascariensis
Flower(s)
Forest and Kim Starr
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5416648

Madagascar ragwort
Senecio madagascariensis
Flower(s)
Forest and Kim Starr
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5416441

Madagascar ragwort
Senecio madagascariensis
Flower(s)
Caleb Slemmons
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Madagascar ragwort
Senecio madagascariensis
Plant(s)
Forest and Kim Starr
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5417852

Madagascar ragwort
Senecio madagascariensis
Seedling(s)
Forest and Kim Starr
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Madagascar ragwort
Senecio madagascariensis
Fruit(s)
Deena Walters
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5414290

Madagascar ragwort
Senecio madagascariensis
Plant(s)
Forest and Kim Starr

Maps


State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit Invasive.org

State Regulated List

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Asteridae
Order: Asterales
Family: Asteraceae
Genus: Senecio

Other System Links

Plants: SEMA15
GRIN: 403707
ITIS: 507500
NPDN Pest: PBFCXBL

Synonyms and Other Names

Other Common Names:
fireweed, Madagascar groundsel

Categories

Category: Forbs/Herbs