by Gogoi R., Bokolial D., Das D. S. (2002)
Department of Botany, Guwahati College, Guwahati – 21 (Assam), India.
in Plant Archives 2(2): 257-262 ref.12 -ISSN :0972-5210 –
The leaf epidermal morphology of Zingiber officinale, Z. zerumbet, Elettaria cardamomum, Kaempfera galanga [Kaempferia galanga], Hedychium coronarium, H. angustifolium, Alpinia galanga, Catimbium malaccense, Costus speciosus, Curcuma longa, Curcuma caesia, and Curcuma zedoaria, collected from Guwahati, Assam, India, was studied.
The morphology of epidermal cell walls, nature and number of epidermal cells per unit area, stomatal frequency, trichome length, and stomatal index were identified as useful parameters for the differentiation of the 12 species.
Lamina was amphistomatic, with straight or straight to curved epidermal cell wall. Trichomes are uniseriate and non-glandular, and present only in Z. officinale, Z. zerumbet, K. galanga, H. coronarium, H. angustifolium, and Costus speciosus.
Stomatal index was highest in K. galanga (abaxial surface) and Z. zerumbet (adaxial surface), and lowest in E. cardamomum (abaxial surface) and A. galanga (adaxial surface).
A key to the 12 species, based on epidermal characters, is presented.