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| ดอกดินทยา || Kaempferia jenjittikuliae Noppornch., in Nopporncharoenkul, Somnoo, Tanming & Maknoi, 2021. |
ABSTRACT
Kaempferia jenjittikuliae, a new species of Kaempferia subg. Protanthium (Zingiberaceae) from Central–Northeastern Thailand, is described and illustrated. The diagnostic characters of this novel taxon are discussed and compared with those of the morphologically similar species Kaempferia lopburiensis, K. rotunda and K. udonensis. Detailed photographs of plants and dissected flowers, and information on phenology, distribution and ecology, are provided. A preliminary IUCN conservation assessment of Critically Endangered (CR) is assigned.
Keywords: Anther crest, Critically Endangered, floral morphology, Kaempferia lopburiensis, Kaempferia rotunda, new species, Phetchabun Province
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| Kaempferia jenjittikuliae Noppornch., sp. nov. A, Habit (vegetative part); B, rhizome and inflorescence; C, flower (front view); D, flower (front and side views); E, calyx and detail of apex; F, dorsal corolla lobe; G, lateral corolla lobe; H, lateral staminode; I, labellum; J, detail of stamen (front and side views) and four apices of anther crest, showing variation in shape; K, detail of stigma with upper part of style (front and side views); L, ovary with epigynous glands and lower part of style (front and side views); M, fruit; N, seed with laciniate aril. Drawn from the holotype, accession N. Nopporncharoenkul NNSB-760 (QBG), by N. Nopporncharoenkul. |
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| Kaempferia jenjittikuliae Noppornch., sp. nov. A and B, Plants in habitat (type locality, Chon Daen District, Phetchabun Province, Thailand); C–E, flowers with various shapes of anther crest (accession 20130454, QBG-living collections). Photographs taken by N. Nopporncharoenkul and T. Somnoo. |
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| Kaempferia jenjittikuliae Noppornch., sp. nov. A, Inflorescence and rhizome; B, habit (inset: detail of ligule and base of midrib [left] and detail of leaf sheath [right]); C, flower (front and side views); D, calyx and floral tube with ovary and stamen (front and side views); E, flower dissection (dc, dorsal corolla lobe; l, labellum; lc, lateral corolla lobe; ls, lateral staminode); F, detail of anther and anther crest (front and side views); G, detail of pistil (from left to right: pistil, stigma and style [front and side views], and ovary with epigynous glands); H, fruit and seeds with a fleshy semi-translucent white, laciniate aril. Photographs of the holotype, accession N. Nopporncharoenkul NNSB-760 (QBG), taken by N. Nopporncharoenkul. |
Kaempferia jenjittikuliae Noppornch., sp. nov.
Similar to Kaempferia lopburiensis Picheans. and K. udonensis Picheans. & Phokham in its habit and leafy shoot, but differs by its upright to slightly arcuate lateral staminodes, deflexed distal half of the labellum, flat labellum base, and incision around half the length of the labellum (compared with horizontal staminodes and labellum, involute labellum base enclosing the anther, and incision more than two-thirds the length of the labellum in K. lopburiensis and K. udonensis). It is also similar to Kaempferia rotunda L. in its floral shape, but differs in its broadly ovate to suborbicular leaves adpressed to the ground and ovate, broadly elliptic to obdeltoid anther crest with irregular trilobed to tetralobed apex (compared with lanceolate-oblong to elliptic, upright leaves and oblong to ovate anther crest with bifid to bilobed apex, usually with 1–3 small teeth between the lobes in K. rotunda).
– Type: Thailand, Phetchabun Province, Chon Daen District, .., 270 m elevation, 19 v 2020, N. Nopporncharoenkul NNSB-760 (holotype QBG!, including flowers preserved in spirit as part of a single specimen; isotype BK!, including flowers preserved in spirit, BKF!, E!, SING!).
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| A–C, Kaempferia lopburiensis (accession N. Nopporncharoenkul NNSB-541, type locality, Amphoe Mueang, Lopburi Province): A, flower (front view); B, flower (side view); C, habit. D–F, Kaempferia udonensis (accession N. Nopporncharoenkul NNSB-508, Sai Yok, Kanchanaburi Province): D, flower (front view); E, flower (side view); F, habit. G–I, Kaempferia rotunda (accession N. NopporncharoenkulNNSB-660, Wang Thong, Phitsanulok Province): G, flower (front view); H, flower (side view); I, habit. Photographs taken by N. Nopporncharoenkul. |
Etymology. The specific epithet, jenjittikuliae, is designated in honour of Dr Thaya Jenjittikul, a ginger specialist at the Department of Plant Science, Faculty of Science, Mahidol University, who has been working on Thai Zingiberaceae, especially the genus Kaempferia, for over 20 years.
Vernacular name. We propose the Thai name dok din Thaya - ดอกดินทยา (dok din = flower that occurs on the ground, Thaya = the first name of Dr Thaya Jenjittikul).
Distribution. Kaempferia jenjittikuliae is strictly endemic to the limestone area of Chon Daen District, Phetchabun Province, Central–Northeastern Thailand.
Ecology. It grows in fine loam soil with rocks under semi-shaded mixed deciduous forest with bamboo, close to the foothills at 250–270 m a.s.l.
Currently, 13 species are recognised in Kaempferia subg. Protanthium, namely K. rotunda L. (Linnaeus, 1753); K. simaoensis Y.Y.Qian (Qian, 1995; Nopporncharoenkul et al., 2016); K. grandifolia Saensouk & Jenjitt. (Saensouk & Jenjittikul, 2001); K. lopburiensis Picheans. (Picheansoonthon, 2010); K. udonensis Picheans. & Phokham, K. xiengkhouangensis Picheans. & Phokham (Phokham et al., 2013); K noctiflora Noppornch. & Jenjitt. (Nopporncharoenkul & Jenjittikul, 2017); K. graminifolia Noppornch. & Jenjitt. (Nopporncharoenkul & Jenjittikul, 2018); K. albiflora Jenjitt. & Ruchis. (Jenjittikul & Ruchisansakun, 2020); K. aurora Noppornch. & Jenjitt.; K. caespitosa Noppornch. & Jenjitt. (Nopporncharoenkul et al., 2020); K. kamolwaniae Picheans., Meechonk. & Wongsuwan (Wongsuwan et al., 2020); and K. takensis Boonma & Saensouk (Boonma et al., 2020). One of these, Kaempferia xiengkhouangensis, is a species endemic to Laos; the other taxa have been found in Thailand (Sirirugsa, 1992; Larsen & Larsen, 2006; Phokham et al., 2013; Boonma et al., 2020; Nopporncharoenkul et al., 2020).
N. Nopporncharoenkul, T. Somnoo, W. Tanming and C. Maknoi. 2021. Kaempferia jenjittikuliae (Kaempferia Subg. Protanthium: Zingiberaceae), A New, Endangered Species Endemic to Thailand. Edinburgh Journal of Botany. 78; 1-13. journals.rbge.org.uk/EJB/article/view/350
DOI: 10.24823/EJB.2021.350
ดอกดินทิพยเนตร (K. rotunda L.) ดอกดินปากเหลือง (K. simaoensis Y.Y.Qian)
ตูบหมูบใบใหญ่ (K. grandifolia Saensouk & Jenjitt.) เปราะลพบุรี (K. lopburiensis Picheans.)
เปราะหูช้าง (K. udonensis Picheans. & Phokham) เปราะราตรี (K. noctiflora Noppornch. & Jenjitt.)
ดอกดินใบข้าว (K. graminifolia Noppornch. & Jenjitt.) ดอกดินอรุณรุ่ง (K. aurora Noppornch. & Jenjitt.)
ดอกดินผาสุก (K. caespitosa Noppornch. & Jenjitt.) ดอกดินกลมวรรณ (K. kamolwaniae Picheans., Meechonk. & Wongsuwan)
เปราะแมงมุม (K. albiflora Jenjitt. & Ruchis.) และ เปราะยักษ์ (Kaempferia sp.)
