Monoon longifolium, the false ashoka, also commonly known by its synonym Polyalthia longifolia, is an Asian small tree species in the family Annonaceae.

[1] This evergreen tree is known to grow over 20 m. in height and is commonly planted due to its effectiveness in alleviating noise pollution.

It exhibits symmetrical pyramidal growth with willowy weeping pendulous branches and long narrow lanceolate leaves with undulate margins.

Its names in other languages include Ashoka in Sanskrit, Unboi (উনবৈ) or Debadaru (দেৱদাৰু)[citation needed] in Assamese, Debdaru in Bengali and Hindi ଦେବଦାରୁ Debadaru in odia[citation needed] Asopalav (આસોપાલવ) (Gujarati), Glodogan tiang (Indonesian), Ashok in Marathi and Nettilinkam நெட்டிலிங்கம் in Tamil, and araNamaram: അരണമരം (Malayalam).

ಕಂಬದ ಮರ Kambada mara in Kannada The False ashoka was cultivated and gained popularity in British India for nostalgic reasons because it resembled the tall, harrow Italian cypress; it also was used for ships' masts.

[5] Bankole et al 2016 find M. longifolium does control chloroquine resistant strains of Plasmodium berghei ANKA in mouse to some degree but is not an effective treatment.