Marcello Catalano

Nepenthes andamana is a tropical pitcher plant endemic to Phang Nga Province, Thailand, where it grows near sea level in coastal savannah and grassland. It is thought to be most closely related to N. suratensis. The specific epithet andamana refers to the Andaman Sea coast of Thailand.

Nepenthes chang is a tropical pitcher plant endemic to the Banthad Mountains of eastern Thailand, where it grows at elevations of 300–600 m above sea level. It is thought to be most closely related to N. kampotiana. The specific epithet chang refers to the Thai island of Ko Chang, where the type specimen was collected.

Nepenthes suratensis is a tropical pitcher plant endemic to Surat Thani Province, Thailand, where it grows near sea level in coastal savannah and grassland. It is thought to be most closely related to N. andamana. The specific epithet suratensis is derived from the name of Surat Thani Province and the Latin ending -ensis, meaning "from".

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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