Nepenthes diatas is closely related to N. densiflora and  N. singalana. It has the "toothy" peristome which makes this species quite handsome. This species is a definite highlander and likes those cool night time temperatures. It's been sort of a slow grower and has only now started putting out some really incredible pitchers. The pitcher itself is almost a suede leather brown with a very ridged maroon peristome. There are two forms that seem to be available. The meadow form and forest form. There are some photos in Charles Clarke's book "Nepenthes of Sumatra" that describe the open vegetation forms as being more robust and sturdier as compared to the forest forms that have more cylindrical and papery pitchers which are more closely related to N. singalana. I like the "meadow" variety best because the peristome seems to have streaks of orange in it. This species is hardy, durable, and does great outdoors.

Cultivation: easy; slow grower, can take full sun
Market availability: size 2 to size 3; available
Species variability: forest form, meadow form, and other locality names
$ / size: moderate $25.00 and up
Cuttings: none available now
Sex: unknown