Both are quite close.
Dinesh ji, may decide based on the following differences as per Google AI
view:
*Pogostemon wightii* and *Pogostemon speciosus* are both aromatic, endemic
species of the Lamiaceae family found in the Southern Western Ghats of
India. They are similar in appearance and habitat, frequently found in
high-altitude Shola forests (around 1,000–2,200m).
[image: ScienceDirect.com]ScienceDirect.com +2
The key differences lie in their habit (size/growth form), specific floral
characteristics, and leaf texture.
Key Differences at a Glance
Feature *Pogostemon wightii* Benth. *Pogostemon speciosus* Benth.
Growth Habit Small shrub or herb (sometimes subshrub) Shrub, up to 2 m tall
Stem/Branching Quadrangular, strigose (stiff, appressed hairs) Pilose-hispid
(hairy) brown branches
Leaf Features Densely strigose, 5-6 cm long, ovate Hirsute, 3-8 cm long,
ovate/orbicular, turn black when dry
Inflorescence 4-8 cm long spikes, continuous Often described as having
"bottlebrush" appearance
Stamens Bearded filaments Lacks moniliform hairs on filaments
Nutlets Biconvex to triangular, smooth, brown Suborbicular, blackish, 1 mm
long
Detailed Breakdown
- Pogostemon wightii:
- Description: A small, delicate shrub or herb, often found along
stream sides or in marshy spots within Shola forests.
- Appearance: Leaves are smaller (5-6 x 3-4 cm) and intensely hairy
(strigose).
- Flowering: Occurs in December-January.
- Distinctive Feature: Filaments (stamens) are bearded.
- Pogostemon speciosus:
- Description: A more robust shrub, growing up to 2 meters, common on
rocky slopes and degraded areas of the Nilgiri and Anamalai hills.
- Appearance: Leaves are larger and hairy, with the unique
characteristic of turning black when dry.
- Flowering: Occurs from January to February.
- Distinctive Feature: Leaves and stem turn blackish when dried, and
the stamens are very long, giving a "bottlebrush" appearance.
[image: ScienceDirect.com]ScienceDirect.com +4
On Wed, 25 Feb 2026 at 14:03, Dinesh Valke <[email protected]> wrote:
>
> *FOR VALIDATION ::*
> ¿ *Pogostemon wightii* Benth. ?
> The Nilgiris :: Jan 29, 2026 · 11:39 AM IST
> Naduvattam, about 1855 m asl
> ------------------------------
> [image: ¿ Pogostemon wightii Benth. ?]
> <https://www.inaturalist.org/observations/340136342>
> [image: ¿ Pogostemon wightii Benth. ?]
> <https://www.inaturalist.org/observations/340136342>
> [image: ¿ Pogostemon wightii Benth. ?]
> <https://www.inaturalist.org/observations/340136342>
> [image: ¿ Pogostemon wightii Benth. ?]
> <https://www.inaturalist.org/observations/340136342>
> Regards.
> Dinesh
>
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With regards,
J.M.Garg,
https://efloraofindia.com/
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