Nepenthes ovata
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Nepenthes ovata is a tropical pitcher plant endemic to Sumatra. The specific epithet ovata is Latin for "ovate" and refers to the shape of the lower pitchers.
Nepenthes ovata (pictured) was for a long time confused with the closely related N. bongso
A rosette plant with a lower pitcher
An intermediate pitcher
Nepenthes flava
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Nepenthes flava is a tropical pitcher plant endemic to northern Sumatra, where it grows in montane forest at 1800–2200 m above sea level.
Nepenthes flava bears a conspicuous band of nectar glands on the underside of the lid, around the midline. This feature, among others, distinguishes it from N. inermis.
Image: Nepenthes flava 4
Image: Nepenthes flava 12