Roscoea

Roscoea alpina Royle (N. Pakistan to Himalaya: East Himalaya, Nepal, Pakistan, West Himalaya as per POWO)

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Roscoea auriculata K.Schum. (E. Nepal to Sikkim and S. Central Tibet: East Himalaya, Nepal, Tibet as per POWO)

 

Roscoea purpurea Sm. (W. & Central Himalaya: Nepal, West Himalaya as per POWO)

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List of species of Roscoea from Gingers of India (2006):
Roscoea alpina Royle in Ill. Bot. Himal. 361, t. 89. 1839.
Roscoea auriculata K. Schum. in Engl., Pflanzenr. 46:118. 1904.
Roscoea brandisii (King ex Baker) K. Schum. in Engl., Pflanzenr. 46:119, f.16 c-e. 1904.
Roscoea capitata J.E.Sm. in Trans. Linn. Soc. 13:461. 1812.
var. capitata
var. purpurata Gagnep in Bull. Bot. Soc. France 1, 4:74. 1902.
Roscoea exilis Horan., Monogr. 21. 1862.
Roscoea nepalensis Cowley in Kew Bull. 34:811. 1980.
Roscoea purpurea J.E.Sm., Exot. Bot. 2:97, t. 108. 1804
Roscoea tibetica Batalin in Acta Hort. Ptrop. 14, 8:183. 1895.
Roscoea tumjensis Cowley in Kew Bull. 36:768. 1982.
Roscoea wardii Cowley in Kew Bull. 36:768. 1982.


Karthikeyan et al. (1989) have mentioned following species of Roscoea in India:
  1. Roscoea alpina Royle
  2. R. auriculata K. Schum.
  3. R. brandisii (King ex Baker) K. Schum.
  4. R. capitata J.E.Sm.
  5. R. exilis Horan. [synonym of Roscoea alpina Royle]
  6. R. nepalensis Cowley
  7. R. purpurea J.E.Sm.
  8. R. tibetica Batalin
  9. R. tumjensis Cowley
  10. R. wardii Cowley

Scrutiny in TPL indicates one as synonym.

Reference:
Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. 1989. Florae Indicae Enumeratio: Monocotyledonae, Botanical Survey of India, Calcutta, pp. 297-298.