Sandpaper vine
നീലമണിনীলমনিলতা
Petrea volubilis L.
- light
- Sun–part
- water
- Little
- tall
- 7.5 m
- wide
- 1.4 m
Verbenaceae
Also called Queen's Wreath, Queen's-wreath
Formerly Petrea amazonica, Petrea arborea, Petrea atrocoerulea, Petrea colombiana, and 14 more
When it flowers
Flowers all year 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
- Scrambling shrub or lianaKew's checklist, not yet checked
- Climate
- Wet tropicalKew's checklist, not yet checked
- Wild in
- Trop. & Subtrop. AmericaKew's checklist, not yet checked
- Light
- Full sun to part shade (3 h or more)Read from NC State Extension, UF/IFAS and Wikipedia, checked by a majority of its sourcesBacked by 2 of 3 sources. Sources differ: NC State Extension full, part; UF/IFAS full, part; Wikipedia full
- Height
- 7.0 m to 7.9 mRead from NC State Extension and UF/IFAS, checked: the middle of what its sources sayHalfway between its 2 sources, which differ. Sources differ: NC State Extension 6–12 ft; UF/IFAS 40–40 ft
- Spread
- 91 cm to 1.8 mRead from NC State Extension, one source
- Water
- Little: takes droughtRead from NC State Extension, UF/IFAS and Wikipedia, checked by a majority of its sourcesBacked by 2 of 3 sources. Sources differ: NC State Extension medium; UF/IFAS low; Wikipedia low
- Flowers
- Purple, blueRead from NC State Extension, UF/IFAS and Wikipedia, checked by a majority of its sourcesBacked by 2 of 3 sources. Sources differ: NC State Extension purple; UF/IFAS blue, purple, white; Wikipedia blue, violet
- Coldest it survives
- -1.5 °C (USDA zone 9b)Read from NC State Extension and Wikipedia, checked: the middle of what its sources sayHalfway between its 2 sources, which differ. Sources differ: NC State Extension -1.1 °C; Wikipedia -2 °C
Not known yet: heat, hottest it survives.
In other languages (12)
- Spanish
- Bejuco de ajo, Nazareno, Petrea
- root
- tháthub, lyenn wid, oop’ tsiimim, yo’och oop’ tsiimim
- Chinese
- 藍花藤, 紫霞藤, 錫葉藤
- Czech
- petrea ovíjivá
- Japanese
- ムラサキツクバネカズラ
- Chinese (China)
- 蓝花藤
- Thai
- พวงคราม
- German
- Purpurkranz
- Finnish
- sinipotkurikukka
- Slovak
- petrea ovíjavá
- Russian
- Петрея вьющаяся
- French
- Liane de Saint Jean
Where this comes from
- iNaturalist, read 2026-10-24, CC0-1.0 (observation counts)
- Wikidata, read 2026-10-26, CC0-1.0
- Kew's checklist, read 2026-10-24, CC-BY-4.0
- NC State Extension, read 2026-10-25, fact, cited
- UF/IFAS, read 2026-10-25, fact, cited
- Wikipedia, read 2026-10-25, fact, cited
- Wikimedia Commons, read 2026-10-24, CC BY-SA 3.0
- iNaturalist, read 2026-10-25, CC BY-SA
- iNaturalist, read 2026-10-25, CC BY
- iNaturalist, read 2026-10-25, CC BY
- 3D model: Petrea volubilis (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.