into a 1 mm high ridge. It reaches 4.5 cm in length by 3.8 cm in width. The lower surface of the lid bears numerous nectar glands. Most are orbicular and measure 0.1–0.2 mm in diameter; this type occurs at a density of 1500–2000/cm2. Larger, longitudinally elliptic glands of 0.4 mm, and occasionally even up to 3 mm, are concentrated around the midline. An unbranched spur measuring up to 5 mm in length is inserted near the base of the lid. It may or may not be flattened. Lower pitchers are typically reddish on their outer surface, often having speckles of a darker red colour. The inner surface varies from white to light orange. The peristome may be orange, through red, to purple. The lid is often yellowish on its lower surface and the same colour as the pitcher cup on its upper surface. Stunted plants from higher altitudes typically produce dark terrestrial pitchers. Upper pitchers are infundibular and somewhat inflated in the basal quarter to third of the pitcher cup, becoming cylindrical or slightly infundibular above. A conspicuous hip often delimits these two parts of the trap. Rarely they may be wholly obovoid. Aerial traps are considerably larger than their terrestrial counterparts, growing to 18 cm in height by 5 cm in width. Ribs are present in place of wings. The peristome is cylindrical and up to 5 mm wide, being either uniformly broad throughout or slightly expanded at the sides and rear. Other parts are similar to those found in terrestrial traps. Aerial pitchers are usually yellowish throughout, occasionally with tinges of orange or red in older specimens. The ventral ridges are sometimes completely red. The inner surface may be white to cream coloured. The peristome ranges in colour from yellow to red, whereas the lid is most commonly yellow throughout. Nepenthes lamii has a racemose inflorescence up to 14 cm long. The peduncle constitutes up to 7 cm of this length and has a basal width of around 2 mm. Flowers are borne solitarily on pedicels (≤10 mm long) that lack bracts. Tepals are elliptic and measure up to 3 mm in length by 3.3 mm in width. The androphore is up to 2.5 mm long and bears an anther head measuring up to 1.25 mm by 1.5 mm. Most parts of the plant lack a persistent indumentum, being glabrous. A very sparse covering of pale brown,