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| Curcuma nakhonphanomensis Boonma, Saensouk & P. Saensouk in Saensouk, Boonma & Saensouk, 2022. กระเจียวนครพนม || smujo.id/biodiv/article/view/12165 |
Abstract
Curcuma nakhonphanomensis Boonma, Saensouk & P. Saensouk sp. nov. (Zingiberaceae: Zingibereae) was distributed in Nakhon Phanom Province, northeastern Thailand. The morphological characteristic of this species makes it fall into Curcuma subgenus Ecomata, due to the presence of epigynous glands, lack of coma bracts and bracts fused only at the base, and production of open-form of flowers. This plant did not match any existing species after careful morphological examination and comparison of all allied species in the genus Curcuma, especially in subgenus Ecomata. Therefore, we described it here as a new species to science in the name of Curcuma nakhonphanomensis Boonma, Saensouk & P. Saensouk. The specific epithet is named according to the province's name of the type locality. The morphological characteristics description, illustrations, vernacular name, ecology, phenology, distribution, utilization, conservation status, and map of distribution are present. The comparison table of the new species and its allies species, including a revised key to 41 species of Curcuma subgenus Ecomata is provided.
Keywords: Curcuma nakhonphanomensis, Ecomata, Nakhon Phanom Province, taxonomy, Zingiberaceae
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| Curcuma nakhonphanomensis Boonma, Saensouk & P. Saensouk sp. nov. (A) side view of inflorescence with flowers, (B) dorsal corolla lobe, (C) side and front view of the anther, (D) lateral corolla lobes, (E) labellum, (F) staminodes, (G) ovary with epigynous glands, (H) calyx, (I) side view of flower, (J) habit. Drawn and designed by Thawatphong Boonma |
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| Curcuma nakhonphanomensis Boonma, Saensouk & P. Saensouk sp. nov. (A) side view of inflorescence with flowers, (B) front view of flower, (C) side and front view of the anther, (D) side view of an ovary with epigynous glands, (E) side view of two flowers–left flower was taken a staminode out one side to show the anther and filament, (F) lateral staminodes, (G) dorsal corolla lobe, (H) lateral corolla lobes, (I) bract, (J) upper side of the labellum, (K) lower side of the labellum, (L) calyx, (M) oblique-side view, front view and side view of stigma, (N) oblique view of flowers, (O) top view of inflorescence with flowers, (P) leaves. Photographs and designs by Thawatphong Boonma |
Curcuma nakhonphanomensis Boonma, Saensouk & P. Saensouk sp. nov.
Subgen. Ecomata
The new species is similar to Curcuma peramoena Souvann. & Maknoi but differ in having leaf sheath, ligule, and petiole green with a brownish red tinge, lamina broader 8–13 cm wide, leaves base cordate to slightly rounded, leaves midrib usually with red patches, pubescent on both surfaces; peduncle pubescent; fertile bracts pubescent; flower 6.2–6.5 cm long; calyx 22–25 mm long; corolla lobes sparsely hairy; labellum obovate, labellum apex trilobed, sides lobe rounded, middle lobe emarginate with an acute tip, incision up to 12 mm long, labellum white with yellow distal half of median band to yellowish orange, white basal half median band, with dark red lines in the mid lobes and dark red lines along both sides of the white median band from basal to 1/4 of the labellum length; staminodes asymmetrical broadly elliptic-rhombic; filament c. 6 × 4 mm, white; anther 11–12 mm long; spurs c. 2 mm long; crest c. 2 mm long; epigynous glands c. 8 mm long, apex sharp.
Piyaporn Saensouk, Thawatphong Boonma and Surapon Saensouk. 2022. Curcuma nakhonphanomensis (Zingiberaceae), A New Species from the lower Mekong River Basin, northeastern Thailand. Biodiversitas. 23: 6040-6048. https://smujo.id/biodiv/article/view/12165
