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Pajanelia longifolia.jpg
A young Pajanelia longifolia.
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Lamiales
Family: Bignoniaceae
Tribe: Tecomeae
Genus: Pajanelia
Species: P. longifolia
Binomial name
Pajanelia longifolia
(Willd.) K.Schum.
  • Bignonia indica Lour.
  • Bignonia longifolia Willd.
  • Bignonia macrostachya Wall.
  • Bignonia multijuga Wall.
  • Bignonia pajanelia Buch.
  • Pajanelia multijuga Wall.
  • Pajanelia rheedii Wight.

Pajanelia, commonly known as pajaneli or in Tamil as aranthal,[2] is a monotypic genus of evergreen or briefly deciduous tree in the family Bignoniaceae which contains one only species, Pajanelia longifolia. This species is found in the lowland and hill forests of India, Sri Lanka, Myanmar, Thailand, Malaysia and Indonesia.[3] It grows as a small to medium sized tree with an upright habit, with few sideways branches. It can grow up to 30 metres (98.4 feet) tall.[4]


Pajanelia has compound leaves which are imparipinnate, ovate, glabrous and chartaceous with 7-17 leaflets. Between January and June, this species produces flowers of crimson-purple color, white within, in large terminal recemose panicles. Then, it produces brown fruit of capsule shape which are winged on both margins, compressed and smooth. The seeds are flat, papery and winged on both sides.[5]


Pajanelia has uses within traditional south Asian medicine.[3] The leaves, once decocted, can be used to treat some fevers and stomach disorders. The leaves, once placed in certain solvents, are known to have antimicrobial effects against certain bacteria. Bacteria affected by this include Bacillus subtilis and Vibrio parahaemolyticus,[6] which cause gastrointestinal illnesses in humans.[7] Pajanelia is used in parts of Malaysia, where it is commonly planted as stakes for hedges along rice fields, and is also planted as support tree in pepper plantations.[3] Pajanelia is also used for woodworking purposes, due to it being very hard and close grained. It has been used by the native Andamanese, who use the wood for house building, planking and canoe building.[8]


  1. ^, retrieved 16 July 2018 
  2. ^ Pajanelia longifolia (Willd.) K.Schum - BIGNONIACEAE, retrieved 16 July 2018 
  3. ^ a b c Useful Tropical Plants, retrieved 16 July 2018 
  4. ^ Mansfeld's World Database of Agricultural and Horticultural Crops, retrieved 16 July 2018 
  5. ^ Pajanelia, retrieved 16 July 2018 
  6. ^ Akhila, Zainab; Rama, Bhat; Sadananda, Acharya; Subramanya, Padyana (2013). "Studies on Antioxidant and Antimicrobial Activities of Pajanelia longifolia (Willd.) Schuman". Journal of Research in Obesity. doi:10.5171/2013.756484. 
  7. ^ CDC Disease Info vibriop
  8. ^