English: Original caption: "Nepenthes alzapan A habit, with upper pitcher and male inflorescence; B transverse section of stem at base of leaf insertion; C hairs on outer pitcher wall; D lid of upper pitcher, lower surface; E nectar glands from lower surface of lid; F peristome, view from above; G peristome, inner edge, showing teeth; H peristome, transverse section, inner edge to right; I detail of fringed wings of upper pitchers; J male flower; K rhachis indumentum; L tepal indumentum, outer surface. A–E & J–L from Ramos & Edanõ in BS 45690 (NY); F–I from Ramos & Edanõ in BS 45690 (K). Scale bars: single = 1 mm; graduated single bar = 2 mm and 3 mm; double = 1 cm; graduated = 5 cm. All drawn by ANDREW BROWN."