Trongtham Kruetreepradit

Nepenthes kerrii is a tropical pitcher plant native to Tarutao National Marine Park in southern Thailand, where it grows at elevations of 400–500 m above sea level. The 2018 IUCN assessment also considers the taxon found on Langkawi Island of Malaysia (~10 km south of Tarutao) to be conspecific. This species is thought to be most closely related to N. kongkandana. The specific epithet kerrii refers to Irish medical doctor Arthur Francis George Kerr, who made the first known herbarium collection of this species. In 2024, a group of Malaysian researchers circumscribed the Langkawi plants (N.

Nepenthes kongkandana is a tropical pitcher plant endemic to Songkhla Province in southern Thailand. It is closely related to N. kerrii.

Nepenthes rosea is a tropical pitcher plant known only from Krabi Province, Peninsular Thailand, where it grows at 450–520 m above sea level. Nepenthes rosea got its name from their pitchers which often have uniformly pink interiors. It has been seen growing in sand and humus in varying proportions, on both vertical and flat ground in clearings, scrubland, and open forests. Nepenthes rosea was formally described by Marcello Catalano and Trongtham Kruetreepradit in December 2014. It is unusual in that it sometimes produces a rosette along the peduncle. Nepenthes rosea belongs to the N.

Nepenthes orbiculata is a tropical pitcher plant endemic to Phang Nga Province in Thailand. Among the Nepenthes species associated with N. orbiculata are Nepenthes andamana and Nepenthes mirabilis to which it is sympatric. Particularly, Nepenthes orbiculata is closely related to N. mirabilis but is different in its globose pitchers and its pitcher hip just below the lid, whereas the pitcher in N. mirabilis is more elongate, and the pitcher hip is at the center or in the lower half.. Similarly, Nepenthes orbiculata is closely related to N. mirabilis var. globosa in its glabrous leaves, or

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