Pleuranthodium undetermined

Lofthus, Ø., Newman, M. F., Jimbo, T. & Poulsen, A. D., 2020, The Pleuranthodium (Zingiberaceae) of Mount Wilhelm, Papua New Guinea, Blumea 65 (2), pp. 95-101 : 96

KEY TO THE PLEURANTHODIUM SPECIES OF MOUNT WILHELM

1. Lamina strigose along veins underneath; calyx with 2(–3) appendages horn- or knob-like at apex; corolla dark reddish brown; labellum pale yellow-green with reddish centre................................... 1. P. corniculatum

1. Lamina glabrous underneath; calyx without appendages; corolla yellow to pale orange; labellum pale orange.... 2

2. Leafy shoots 3–4.3 m long; calyx pale yellow-green, smooth, leathery and persistent when fruiting; fruit clearly trigonous........................ 2. P. piundaundense

2. Leafy shoot 1.6–1.8 m long; calyx pale red, distinctly wrinkled, membranous, not fully persistent when fruiting; fruit slightly trigonous.......................... 3. P. sagittatum