Zingiber neesanum

Zingiber neesanum (J.Graham) Ramamoorthy, Fl. Hassan Distr. 769 1976. (Syn. Alpinia neesana J.Graham; Zingiber diwakarianum R.Kr.Singh; Zingiber macrostachyum Dalzell);
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W. India as per POWO;
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Neesam Ginger • Marathi: नीसम Nisam;
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As per efi thread:
Following recent paper published in Taxon “Fixing stray traditions in gingers: The identity and nomenclatural history of Zingiber neesanum and other entwined names (wiley.com)” dealing with and resolving century old confusion of the names Z.neesanum (J.Graham) Ramamoorthy and Z.macrostachyum Dalzell. which had a long ambiguous history with incorrect application of name Z. neesanum for white flowered Zingiber found widely in Central and Southernmost Western Ghats. The lack of fieldwork in type locality and historical confusion also lead to publication of a new name Z. diwakarianum R.Kr.Singh, now to be treated as a heterotypic synonym of true Z. neesanum. Authors of this paper confirmed through extensive field visit in type locality that true Z.neesanum (J.Graham) Ramamoorthy originally described as Alpinia neesana J.Graham from Maharashtra (Khandala & Mahabaleshwar) have cadmium yellow flowers and is endemic to Northern Western Ghats (so far known from only 8 districts of Maharashtra) while widespread and much variable white flowered Zingiber with purplish streaked labellum that was for long treated as Z.neesaum represents other species first named as Z. macrostachyum Dalzell which however is illegitimate name as was not validly published (having no type designated in protologue), thus newly described Z. anamalayanum Sujanapal and Sasidh. forms to be first validly published name for white flowered Zingiber widely distributed in Central and Southern Western Ghats..
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KAS Week::(Zingiberaceae for ID from KAS -10/10/2012-NJ):
Zingiberaceae (Wild ginger) For identification
Photo taken on 20/09/2008

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Yes, this is Z. diwakarianum (earlier name Z. neesanum was mis-applied hence changed) in fruiting stage. Image of flowering spike attached. It grows among clumps of shrubs on the plateau and flowers in July.

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I think Zingiber neesanum as per What is Zingiber neesanum anyways? and Correcting page Zingiber diwakarianum R.Kr.Singh name to Zingiber neesanum (J.Graham) Ramamoorthy and transferring images of Z. neesanum page to Zingiber anamalayanum Sujanapal and Sasidh.

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What is Zingiber neesanum anyways?: 1 images.
Confusion on which name to use for which species remained a constant theme for the two ginger species depicted in the following photographs. Both Zingiber species occur in Western ghats and are widely distributed, yet their identity and names used for them remained a hotly debated topic in every forum interested in them, including ‘eflora of India’.
Me and my co-authors have recently published a study which addressed this problem in detail and provided a solution for the same ✨Our results mainly conclude that
1) The Yellow flowered Zingiber species occurring in northern Western Ghats must be recognized with name Zingiber neesanum. 2) Recently proposed new name for the same species – Zingiber diwakarianum – must not be preferred 3) White flowered Zingiber species predominant in Central and Southern Western Ghats must be called by the name Zingiber anamalayanum.
In addition to these 3 main conclusions we also pinpointed the origin of the said problem, how it persisted in time and how we can learn from our mistakes and not repeat the same again. We have also shed light on some interesting botanical history, importance of herbarium specimens, digitizing historical documents in connection with botany and much more.
Henceforth the two species will be known by their correct name throughout the globe, facilitating their unambiguous identification.
Everything under the sun in connection with these species will be much precise now, let it be assessing their conservation status or considering them from utilitarian point of view.

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Correcting page Zingiber diwakarianum R.Kr.Singh name to Zingiber neesanum (J.Graham) Ramamoorthy and transferring images of Z. neesanum page to Zingiber anamalayanum Sujanapal and Sasidh.:
Following recent paper published in Taxon “Fixing stray traditions in gingers: The identity and nomenclatural history of Zingiber neesanum and other entwined names (wiley.com)” dealing with and resolving century old confusion of the names Z.neesanum (J.Graham) Ramamoorthy and Z.macrostachyum Dalzell. which had a long ambiguous history with incorrect application of name Z. neesanum for white flowered Zingiber found widely in Central and Southernmost Western Ghats. The lack of fieldwork in type locality and historical confusion also lead to publication of a new name Z. diwakarianum R.Kr.Singh, now to be treated as a heterotypic synonym of true Z. neesanum. Authors of this paper confirmed through extensive field visit in type locality that true Z.neesanum (J.Graham) Ramamoorthy originally described as Alpinia neesana J.Graham from Maharashtra (Khandala & Mahabaleshwar) have cadmium yellow flowers and is endemic to Northern Western Ghats (so far known from only 8 districts of Maharashtra) while widespread and much variable white flowered Zingiber with purplish streaked labellum that was for long treated as Z.neesaum represents other species first named as Z. macrostachyum Dalzell which however is illegitimate name as was not validly published (having no type designated in protologue), thus newly described Z. anamalayanum Sujanapal and Sasidh. forms to be first validly published name for white flowered Zingiber widely distributed in Central and Southern Western Ghats.
As the paper is not freely available so I have added a brief summary and one can go through the abstract on the above given link.

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References:
efi thread  POWO

Zingiber neesanum – Neesam Ginger
IPNI  e-monocot  Zingiber diwakarianum (Zingiberaceae) – a new species from North Western Ghats, India