The stem, tendrils and midribs are most commonly yellow to green, but may be tinged orange or red in some specimens; this more intense colouration seems to be associated with drought stress. The laminae are usually green, but may be orange, red, or even purple when young. These developing leaves gradually turn green with age. Plants often consist of 2 or 3 reddish leaves at the top with many green leaves below. Lower pitchers are mostly green, yellow, orange or sometimes red, with darker blotches of orange to purple. The peristome and lid may be any of the base colours of the pitcher exterior, but without blotches. The inner surface is yellow or green and may have reddish speckles. Upper pitchers are similar but often lack blotches, being a solid green, yellow, orange, or red, although reddish aerial traps occasionally do bear some darker markings. Sometimes upper pitchers may have a contrasting combination of colours in the form of a reddish pitcher body and yellow or green peristome, or "vice versa".