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 Sat, 14 Feb 2026 at 12:18, Dinesh Valke <[email protected]> wrote:
> Many many thanks Saroj ji.
> I am not able to sort the differences among the two species.
> I am going to post later (it may take a day or two) another observation
> which I think could be *Pogostemon wightii *Benth.
> We will wait for someone to validate our thoughts.
> Regards.
> Dinesh
>
> On Sat, Feb 14, 2026 at 11:17 AM Saroj Kasaju <[email protected]>
> wrote:
>
>> *Pogostemon wightii *Benth. ??
>>
>> Thank you.
>>
>> Saroj Kasaju
>>
>>
>> On Fri, Feb 13, 2026 at 9:32 PM Dinesh Valke <[email protected]>
>> wrote:
>>
>>>
>>> *FOR VALIDATION ::*
>>> ¿ *Pogostemon speciosus* Benth. ?
>>> The Nilgiris :: Jan 28, 2026 · 2:18 PM IST
>>> Kodapamund, about 2415 m asl
>>> ------------------------------
>>> [image: ¿ Pogostemon speciosus Benth. ?]
>>> <https://www.inaturalist.org/observations/338444453>
>>> [image: ¿ Pogostemon speciosus Benth. ?]
>>> <https://www.inaturalist.org/observations/338444453>
>>> [image: ¿ Pogostemon speciosus Benth. ?]
>>> <https://www.inaturalist.org/observations/338444453>
>>> Regards.
>>> Dinesh
>>>
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>>> .
>>>
>>
--
With regards,
J.M.Garg,
https://efloraofindia.com/
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