Crown flower
ಅರ್ಕमदारநீல எருக்கு
Calotropis gigantea (L.) W.T.Aiton
- light
- —
- water
- —
- tall
- 4.0 m
- wide
- —
Apocynaceae
Also called Giant Milk Weed, Crown Milkweed, Giant milkweed
Formerly Asclepias gigantea, Madorius giganteus, Periploca cochinchinensis, Streptocaulon cochinchinense
When it flowers
Flowers January to June and November in the tropics.
Read from iNaturalist photographs of it in flower. A month counts at 50% of the best month's flowering share (smoothed over three months) and 10% of its flowering count, from at least 100 flowering observations in the band.
If a child, a pet or anyone may have eaten a plant, contact a doctor or vet straight away, or call the National Poisons Information Centre (AIIMS, New Delhi) on 1800 116 117, free and open 24 hours.
Something wrong with it?About it
- Grows as
- Shrub or treeKew's checklist, not yet checked
- Climate
- Seasonally dry tropicalKew's checklist, not yet checked
- Wild in
- S. China to Trop. AsiaKew's checklist, not yet checked
- Height
- 4.0 mRead from Wikipedia, one source
- Flowers
- White, purpleRead from Wikipedia, one source
Not known yet: light, spread, water, coldest it survives, heat, hottest it survives.
Grow it with
Suggested by a rule, not by a gardener: same climate (kew), flowering when this plant does not (inaturalist), and a different shape.
Apple-of-PeruFlowers July to October and December, when this does not
Arabian jasmineFlowers July to October and December, when this does not
Barbados lilyFlowers July to October and December, when this does not
Billygoat weedFlowers July to October and December, when this does not
Black-eyed Susan vineFlowers July to October and December, when this does not
Blue dazeFlowers July to October and December, when this does not
In other languages (12)
- Chinese
- 牛角瓜
- Portuguese
- Madar
- Russian
- Калотропис гигантский
- Indonesian
- Widuri, Biduri
- German
- Kronenblume, Madarstrauch
- Japanese
- カイガンタバコ
- Sinhala
- වරා
- Thai
- รักดอกม่วง
- root
- Sidogori/Sidaguri, Lembiaga, मदार
- Chinese (China)
- 牛角瓜
- Santali
- ᱟᱠᱟᱣᱱᱟ
- Lithuanian
- Didžioji pienuolė
Where this comes from
- iNaturalist, read 2026-10-25, CC0-1.0 (observation counts)
- Wikidata, read 2026-10-26, CC0-1.0
- Kew's checklist, read 2026-10-24, CC-BY-4.0
- Wikipedia, read 2026-10-25, fact, cited
- Wikimedia Commons, read 2026-10-25, CC BY-SA 4.0
- iNaturalist, read 2026-10-25, CC BY-SA
- iNaturalist, read 2026-10-25, CC BY
- iNaturalist, read 2026-10-25, CC0
- 3D model: Calotropis gigantea (built for Vanagrha) by Vanagrha, own
A fact “checked by a majority of its sources” was settled by a vote of the pages it was read from, not by a person reading it; one marked “one source” rests on that page alone. Anything else not marked checked has not been checked yet. Where nothing is known, the page says so rather than guess.