Exacum wightianum Arn., Ann. Sci. Nat., Bot. II, 11: 176 1839. (Syn: Exacum foliosum Griseb.; Lisianthius zeylanicus Spreng. (Unresolved));
Common name: Wight’s Persian Violet

Shrubs, stem 4-winged. Leaves opposite, 6 x 4 cm, broadly ovate, lanceolate, acuminate, membranous, 5-nerved, sessile. Cymes axillary and terminal; calyx lobes winged, 12 mm, lanceolate, wings to 4 mm broad; corolla rotate, tube 6 mm, lobes 2 cm, oblanceolate, apiculate; stamens 5, filaments 4 mm; ovary many ovuled, style 8 mm, stigma sub capitate.

Flowering and fruiting: April-July
Southern Western Ghats (Endemic)
(Attributions- Dr. N Sasidharan (Dr. B P Pal Fellow), Kerala Forest Research Institute, Peechi

Images by Prabhu Kumar, inserted by Gurcharan Singh (Please click links to see details and more images).



Gentianaceae week: Exacum wightianum : 4 posts by 4 authors. Attachments (3).

Exacum wightianum collected from Muthikulam forest, Palakkad during October 2013.

Exacum is a genus which I know very little. Thanks for showing another species.

Images by Subhanjan Kayet (ID Smita Raskar) , inserted by Gurcharan Singh (Please click links to see details and more images).


Plant for id request blue flower : 2 posts by 2 authors. Attachments (3)

Plant for id request. State KERALA. october 2015
Place: Thekaddy  

Exacum wightianum, Family Gentianaceae  

efloraindia: 141011 BRS63: Date/Time-Location- )7.10.2011
Place, Altitude, GPS- Munnar (Kerala) 1800 MSL
Habitat- Urban (Road side)

Exacum sp. of Gentianaceae family.

Calyx lobes with broad dorsal wings that are prominently nerved (not so clear in the picture), leaves 5 nerved suggests that this could be Exacum petiolare.

Leaves are petioled according to the key provided by Gamble here it seems that leaves are sessile.

This appears to be interesting
I agree with …
The leaves here are clearcut sessile. Petals are also 5. Doesn’t fit in any key from BSI Maharashtra. or Cooke’s flora. Is it wild or garden plant?

Yes I agree with … that this shows some striking difference from the one that is described in the key provided by Gamble as well.

Further, I ruled out of the possibility of this being E. petiolare because of 5 petals against the 4 petals mentioned in keys.
… where exactly from Munnar you collected this plant?

I think this is Exacum petiolare of Gentianaceae

But leaves are sessile here! No petiole for petiolare

Yes … You are right. I overlooked that completely. This must be E. pedunculatum.

I think close to images at Exacum wightianum Arn.

Exacum wightianum 

I also picked this up from Munnar, Kerala, attaching Picture of my collection.




Exacum wightianum, : 2 posts by 2 authors. Attachments (1)

Exacum wightianum,
Pothamedu near Munnar, Kerala,  in the Nilgiris
First week of October 2018



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