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This genus is accepted, and its native range is Himalaya.
A specimen from Kew's Herbarium

[LKGF]

Harley, R.M. et al. (2004). Labiatae, in The Families and Genera of Vascular Plants (K. Kubitzki, ed. in chief) VI: 167-275. Springer-Verlag, Berlin, Heidelberg, New York.

Morphology General Habit
Shrub with simple hairs
Morphology Leaves
Leaves petiolate, blade ovate, deeply crenate
Morphology Reproductive morphology Inflorescences
Inflorescence lax, thyrsoid, cymes up to 6-flowered
Morphology Reproductive morphology Flowers Calyx
Calyx tubular, 5-lobed, lobes equal or subequal, oblong-elliptic, narrowed at base
Morphology Reproductive morphology Flowers Corolla
Corolla strongly 2-lipped, 4-lobed (1/3), pink to white, posterior lip long, hooded, densely pubescent outside
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens not exserted from corolla, thecae weakly distinct
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma-lobes shortly subequal
Morphology Reproductive morphology Fruits
Nutlets rounded at apex, smooth.
Note
2n = 34.  One species, R. cinerea (D. Don) Baill.
Distribution
Northwestern India, Nepal.

Native to:

India, Nepal, West Himalaya

Roylea Wall. ex Benth. appears in other Kew resources:

First published in Pl. Asiat. Rar. 1: 57 (1830)

Accepted by

  • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.

Literature

Lamiaceae Key Genus Fact Sheets

  • Harley RM, Atkins S, Budantsev AL, Cantino PD, Conn BJ, Grayer R, Harley MM, de Kok RPJ, Krestovskaja T, Morales R, Paton AJ, Ryding O, and Upson T. 2004. Labiatae, in The Families and Genera of Vascular Plants (K. Kubitzki, ed. in chief) VI: 167-275. Sp
  • Roylea Wall. ex Benth. in Edward's Bot. Reg. 15: t. 1289 (1829).

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Lamiaceae Key Genus Fact Sheets
Nina Davies, Gemma Bramley and Don Kirkup, Royal Botanic Gardens, Kew
http://creativecommons.org/licenses/by/3.0