Kaempferia takensis Boonma & Seansouk

Nopporncharoenkul, N. & Jenjittikul, T., 2024, Taxonomic revision of some taxa in Kaempferia subgenus Protanthium (Zingiberaceae) revealing a new species from Thailand and two new synonyms, Blumea 69, pp. 16-26 : 24

Kaempferia takensis Boonma & Seansouk — Fig. 5

Kaempferia takensis Boonma & Seansouk in Boonma et al. (2020) 371. — Type: Thawatphong Boonma 012 (holo KKU!), Thailand, Tak Province, Mae Sot District , 18 Mar. 2019.

Kaempferia kamthornii Picheans. & Meechonkit in Meechonkit & Picheansoonthon (2021) 2221; syn. nov. — Type: Chayan Picheansoonthon & Penjun Meechonkit 060416­1 (holo BK!), Thailand, Tak Province, Mae Sot District , roadside along highway 12 between km 63–64, 6 Apr. 2015.

Notes — During the taxonomic revision of Kaempferia for the Flora of Thailand Project, K. takensis and K. kamthornii were described and recognised as new species ( Boonma et al. 2020, Meechonkit & Picheansoonthon 2021, respectively). However, in the protologue of K. kamthornii no comparison was made with K. takensis . The plant specimens of both species were not only collected from the same area, Mae Sot District of Tak Province in Thailand, but they also displayed the same morphological characters ( Fig. 5 ). Based on morphological evidence and a similar distribution, we synonymise the younger name K. kamthornii with K. takensis .

Kaempferia takensis collected from Mae Sot District of Tak Province was used as accession NNSB373 (called ‘ Kaempferia sp. 3 Phaya Nokkhum’) in the analysis of nuclear ITS2 sequences of Kaempferia subg. Protanthium ( Nopporncharoenkul et al. 2016) .

We also observed that the distribution of K. takensis is larger than originally described, it is found in various provinces of Thailand: Tak, Mae Hong Son, Chiang Mai, Chiang Rai, Phayao, Lamphun, Lampang, Phrae, Kamphaeng Phet, Nakhon Sawan , and Uthai Thani.

Figures

Fig. 5 Kaempferia takensis Boonma & Seansouk. a. Inflorescence and rhizome; b. habit; c. flower from above and side view; d. calyx (inset: detail of calyx apex); e. floral tube with ovary and stamen in front and side view; f. flower dissection (dc. dorsal corolla lobe; l. labellum; lc. lateral corolla lobe; ls. lateral staminode);g. detail of stamen and anther crests in front and side view; h. detail of pistil (from left to right: pistil; stigma and style in front and side view; ovary with epigynous glands); i. fruit; j. seeds (all: Nattapon Nopporncharoenkul NNSB­595, QBG). — Photos by N. Nopporncharoenkul.