 |
| Kaempferia sakolchaii P. Saensouk, Saensouk & Boonma, in P. Saensouk, S. Saensouk, Boonma, Rakarcha, Srisuk et Imieje, 2024. Kaempferia |
Abstract
An examination of the diversity of Zingiberaceae in Thailand led to the discovery of two undescribed taxa within the genus Kaempferia: K. sakolchaii P. Saensouk, Saensouk & Boonma, a newly described species, and K. phuphanensis var. viridans P. Saensouk, Saensouk & Boonma, a novel variety. Additionally, our investigation encompassed the chromosome numbers, karyotypes, and pollen morphological characteristics of these taxa. Both taxa share a chromosome number of 2n = 22, accompanied by distinctive karyotype patterns. Kaempferia sakolchaii displays a karyotype of 12m + 10sm chromosomes, while K. phuphanensis var. viridans presents a karyotype of 10m + 10sm + 2st chromosomes. The pollen grains of K. sakolchaii and K. phuphanensis var. viridans are monads, spheroidal in shape, radially symmetrical, apolar, inaperturate, and exine sculpturing irregularly arranged elongated ornamentation elements with verrucate features. This comprehensive analysis provides valuable insights into the taxonomic classification of these two taxa, enriching our understanding of Zingiberaceae diversity in Thailand.
Keywords: Kaempferia; new species; new variety; Sakon Nakhon; taxonomy; Thailand; Zingiberceae
|
| Kaempferia sakolchaii P. Saensouk, Saensouk & Boonma sp. nov.: (a) habit and (b) flower. Photographs by Surapon Saensouk. (a) Dorsal corolla lobe. (b) Lateral corolla lobes. (c) Side view of flower with calyx and ovary. (d) Staminodes. (e) Labellum. (f) Habit, showing abaxial side of the leaf. (g) Habit with flower, showing adaxial side of leaf. (h) Front view of anther and anther crest. (i) Fruit. (j) Ovary and epigynous glands. (k) Calyx. (l) Bladeless sheath–adaxial surface with black dots. (m) Bracteole. (n) Bract. Drawings by Thawatphong Boonma and Surapon Saensouk. |
Kaempferia sakolchaii P. Saensouk, Saensouk & Boonma sp. nov.
Subgenus Kaempferia
Kaempferia sakolchaii is similar to K. siamensis, but differs in that it has lamina that are narrowly ovate to broadly ovate, adaxially dark green alternated with silver or white longitudinal stripes, with small black dots along the margin, and abaxially pale green with small black dots (vs. K. siamensis having lamina sub-orbicular to orbicular, adaxially plain green, with small black dots only at the distal part, abaxially pale green without small black dots); anther crest c. 6 × 3 mm, bilobed, each lobe apex with four sub-lobes (vs. anther crest c. 5 × 2.5 mm, bilobed, each lobe apex acute); ovary c. 3 × 2 mm (vs. c. 4 × 2); and epigynous glands c. 3 mm long (vs. 6 mm long).
Etymology: The specific epithet “sakolchaii” was bestowed in honor of Professor Emeritus Dr. Sumon Sakolchai, who has a high level of knowledge and skill in the field of pharmacy. Furthermore, he has made significant contributions to the field of pharmaceutical botany, both in Thailand and across the world. In addition, he makes essential contributions as a behind-the-scenes person, providing consistent assistance to researchers in botany and pharmaceutical sciences. Previously, he was the President of Khon Kaen University in Thailand, the President of the Pharmacy Council of Thailand, and currently acts as the President of Burapha University Council in Thailand. “เปราะอาจารย์สุมนต์”
Piyaporn Saensouk, Surapon Saensouk, Thawatphong Boonma, Sarayut Rakarcha , Pathomthat Srisuk and Vincent O. Imieje. 2024. Kaempferia sakolchaii sp. nov. and K. phuphanensis var. viridans var. nov. (Zingiberaceae), Two New Taxa from Northeastern Thailand. Horticulturae. 10(5), 430. DOI: 10.3390/horticulturae10050430
facebook.com/WalaiRukhavej/posts/904906998105395
