Thursday, September 12, 2019

[Botany • 2019] Zingiber perenense • A New Species in Zingiber section Cryptanthium (Zingiberaceae) from Nagaland, India


 Zingiber perenense N. Odyuo, D.K. Roy, C. Lyngwa & A.A. Mao

 in Odyuo, Roy, Lyngwa & Mao, 2019. 
 The Thailand Natural History Museum Journal. 13(1)

 ABSTRACT
 Zingiber perenense N. Odyuo, D.K. Roy, C. Lyngwa & A.A. Mao, a new species belonging to Zingiber section Cryptanthium Horan. under family Zingiberaceae from Nagaland, Northeastern India is described and illustrated. Its affinities with the allied species are discussed.

KEY WORDS: new species, Zingiber, Cryptanthium, Zingiberaceae, Nagaland, India.

Figure 1. Zingiber perenense N. Odyuo, D.K. Roy, C. Lyngwa & A.A. Mao:
 A. Habit, B. Inflorescences, C. Petiole and ligule, D. Lamina surface above, E. Lamina surface beneath, F. Transverse section of Rhizome. Photographed by Dilip Kr. Roy.

Figure 2. Zingiber perenense N. Odyuo, D.K. Roy, C. Lyngwa & A.A. Mao:
A. Inflorescence, B. A flower with bract and bracteole, C. Bract (dorsal view), D. Bract (frontal view), E. A flower with bracteole, F. Bracteole (frontal view), G. A flower, H. Calyx, I. Labellum, J. Lateral staminodes, K. Stamen, with style and stigma, L. Ovary and epigynous glands, M. Transverse section of ovary. Photographed by Dilip Kr. Roy.

Zingiber perenense N. Odyuo, D.K. Roy, C. Lyngwa & A.A. Mao, sp. nov. 

Diagnosis: The new species differs from its allied congeners, Z. kangleipakense in pubescent, bilobed ligule, oblonglanceolate bracteole longer than corolla tube with 2-dentate apex, pubescent corolla tube with red lobes, white with purplish red streaked labellum, stalked anther with 3–4 mm long filament and in comparatively shorter style, 4.5–5 cm long and from Z. roseum in ovate to oblanceolate leaf blade pubescent on both sides, comparatively shorter, 1.5–3 cm long peduncle, oblong-lanceolate to oblong-linear pale green to creamy white bracts, corolla tube shorter than bracts, white with purplish red streaked labellum, with reduced, ovate, 2-dentate lateral staminodes and in pollen grains with striae non-confluent at apices. 

Distribution. INDIA: Nagaland (Peren district, Tesen village forest). So far only known from the type locality.

 Etymology. The specific epithet refers to the place of occurrence of this species.


 Nripemo Odyuo, Dilip Kr. Roy, Chalbasson Lyngwa and Ashiho A. Mao. 2019. Zingiber perenense, A New Species in Zingiber section Cryptanthium (Zingiberaceae) from Nagaland, India. The Thailand Natural History Museum Journal. 13(1); 1-10.


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