Odontonema tubaeforme (Bertol.) Kuntze, Revis. Gen. Pl. 2: 494 494 1891. (Syn: Justicia tubaeformis Bertol.; Odontonema amicorum V.M. Baum; Odontonema flagellum (Oerst.) Kuntze; Odontonema longifolium (Oerst.) Kuntze; Odontonema pantasmense (Oerst.) Kuntze; Odontonema strictum (Nees) Kuntze; Thyrsacanthus flagellum Oerst.; Thyrsacanthus lemairianus Nees; Thyrsacanthus longifolius Oerst.; Thyrsacanthus pantasmensis Oerst.; Thyrsacanthus strictus Nees; Thyrsacanthus tubaeformis (Bertol.) Nees);
S. Mexico to Colombia: Belize, Colombia, Costa Rica, El Salvador, Guatemala, Honduras, Mexico Gulf, Mexico Southeast, Nicaragua, Panamá; Introduced into: Cook Is., Florida, Hawaii, Marianas, Samoa, Society Is., Tonga, Trinidad-Tobago as per POWO;


Acanthaceae fortnight SN 14 : 1 post by 1 author. Attachments (2)
Odontonema cuspidatum (Nees) Kuntze, ornamental shrub from Banagalore garden

Odontonema tubaeforme (Cultivated) as pointed out by … Thanks a lot, …

SL 79 021213 : Attachments (1). 8 posts by 8 authors.
Please ID this medicinal plant with pink/red flowers. Photo was taken in Sri Lanka in Sep 2012.

Can this be Rauvolfia serpentina?

Yes, it looks like Rauvolfia serpentina.

For me this looks like an Acanthaceae member

Does not look like R serpentina

May be Odontonema cuspidatum.

Odontonema tubaeforme (Cultivated) as per images herein.

Flora of Madhya Pradesh: Odontonema tubaeforme (Bertol.) Kuntze from Khajuraho Museum garden:
Odontonema tubaeforme (Bertol.) Kuntze from Khajuraho Museum garden

Flower for ID: Hyderabad July13-NAW01 : Attachments (4). 5 posts by 4 authors.
Garden ornamental for ID
Planted in archaeological park Chand Bagh Maula Ali, Hyderabad.
Photographed 25th June 2013.

Should be Odontonema strictum, common name Firespike as in FOI.

… is right. It is Odontonema strictum of Acanthaceae. This garden plant attracts bees, butterflies and birds (Humming bird).

One important issue for me was whether it is a native species, which Odontonema strictum is’nt. it seems very difficult to find native ornamentals in our gardens and parks!


PRD 4 1/10/2014 : 2 posts by 2 authors. Attachments (1).
Please ID this ornamental herbaceous plant with pink/red flowers. Photo was taken in Sri Lanka in Dec 2013.

Odontonema strictum


Pls ID.Cochin.121114RT.Nov-4 : 3 posts by 2 authors. Attachments (4)

Pls ID.
Place-Cochin-Brought from Srilanka.
Habit-cultivated garden.
Height-2.5 feet.

Odontonema tubaeforme (Bertol.) Kuntze of Acanthaceae –  Firespike ornamental

BND 59 8/11/14 : 6 posts by 4 authors. Attachments (1)
Please ID this small herbaceous medicinal plant with red flowers. Photo was taken in Sri Lanka in Oct 2012.

this is a plant of mexican origin, popular and … now naturalized in tropical americas… Odontonema cuspidatum of Family Acanthaceae
colloquially called the firespike flower
vaguely reminiscent of the matchstick flowers we have seen in specialty nurseries… s red stick like flowers and the name indicates the resemblance.   

Thanks … This is the same thing I have posted- Pls ID.Cochin.121114RT.Nov-4. 2 days back and identity suggested by … as Odontonema tubaeforme. Yes common name ‘Firespike’. The home owner -my friend-told me it was brought from SriLanka.

Looks like Odontonema strictum. Synonym: Odontonema tubaeforme of Acanthaceae



Acanthaceae Fortnight :: Odontonema strictum :: Thane :: DVMAR83/94 : 1 post by 1 author. 1 image.
Odontonema strictum (Nees) Kuntze
at Vaghbil, Thane on January 5, 2007 

Acanthaceae Fortnight :: Odontonema strictum :: Mumbai :: ARKMAR-53/65 : 1 post by 1 author. Attachments (5)
Attached are pictures of Odontonema strictum captured cultivated in the gardens of Mumbai.


SK1483 03 Oct 2018 : 7 posts by 4 authors. Attachments (5)- around 500 kb each.
Location: Hong Kong Park  
Date: 15 August 2018
Elevation: 200 ft.
Habit : Cultivated

This should be Odontonema tubaeforme.

Odontonema tubaeforme (Bertol.) Kuntze. Thank you … !

spectacularly red. nice. and new to me


SK 3452 04 May 2022: 6 very high res. images.

Location: Eden Project, Cornwall, UK
Altitude: 60 m.
Date: 03 April 2022
Habit : Cultivated

Looks like Odontonema tubaeforme.

3 images.


Odontonema tubaeforme (Bertol.) Kuntze: 7 very high res. images.

Location: Bangalore, India 
Altitude: 900m.
Date: 08 August 2022
Habit : Cultivated

This is a common garden plant in my place seen in many parks.


Odontonema cuspidatum from Hawaii-GS22012023-1: 3 very high res. images.
Odontonema cuspidatum photographed by my son from Hawaii-, January 1, 2023

Yes, as per images at

Yes, it is, got a chance to verify it physically.

Yes from me also. It is a garden plant in a park here.


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