base of the lid. Upper pitchers are infundibular throughout, being variably swollen in the upper portion. They are frequently produced, although Cheek and Jebb reported seeing a flowering specimen that lacked upper pitchers. Aerial traps are even smaller than their terrestrial counterparts and some of the smallest pitchers in the genus, reaching only 7.5 cm in height and 3 cm in width. Wings are reduced to a maximum width of only 4 mm with fringe elements up to 3 mm long, but may be absent altogether. The ventral surface between the wings or wing vestiges is usually slightly flattened. The peristome is often cylindrical and bulbous as in lower pitchers, but only up to 5 mm wide. It rises towards the rear, where it is broader. It bears ribs up to 0.5 mm high and spaced up to 1 mm apart, although in some specimens they are inconspicuous. The narrow peristome teeth are up to 1 mm long. The lid, which lacks appendages, is elliptic to ovate and up to 3 cm long by 2 cm wide. The unbranched spur reaches 7 mm in length. Nepenthes bellii has a racemose inflorescence up to 15 cm long by 1 cm wide. The peduncle itself reaches up to 9 cm in length, with a basal diameter of 1 mm. Flowers, which number up to 40 per inflorescence, are borne on one-flowered, ebracteate pedicels up to 4 mm long. Tepals are ovate and up to 2.5 mm long by 1.2 mm wide. The androphore is around 1.5 mm long. Fruits measure up to 20 mm in length. An inconspicuous indumentum of reddish or rust-coloured simple (unbranched) hairs measuring 0.1 mm in length may be present on the pitchers and inflorescence. Tepals are minutely tomentose. The stem, laminae and androphores are typically glabrous. 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