Iguanura mogeae Henderson, 2025

Henderson, Andrew, 2025, A revision of Iguanura (Arecaceae, Arecoideae, Areceae), Phytotaxa 690 (2), pp. 135-188 : 167-169

20. Iguanura mogeae Henderson , sp. nov. Type:— INDONESIA. Near Summit of Bukit Condong, Bentuang Karimun National Park, 1,100 m, 17 September 1997, P. Chai et al. ITTO/BA 0360 (holotype SAR!). Plate 7.

Stems length and diameter not recorded, solitary. Leaf sheaths length not recorded, initially covered with dense, woolly indumentum; ocreas not recorded; petioles 12.5 cm long; rachises 57.0 cm long; leaf blades divided, not rounded at the apex, with a deep split; leaf veins parallel; adaxial leaf veins prominent, rectangular in cross-section; pinnae 10 per side of rachis; middle pinna 43.0 cm long, 3.5(3.0–4.0) cm wide. Inflorescences branched to 1 order; prophylls and peduncular bracts inserted some distance apart, more or less persistent; peduncles 55.5(44.0–67.0) cm long, not wooly tomentose; rachises 5.3(3.0–7.5) cm long; rachillae 7(5–8), 20.0(16.0–24.0) cm long, 1.7(1.6–1.7) mm diameter, widely diverging from the rachis, proximal part of rachillae not with distantly spaced triads, glabrous or sparsely tomentose, not filiform with triads sunken in shallow, more or less closely spaced pits; rachilla bracts not elongate; distal triad bracteoles well-developed; distal part of flower pits glabrous; staminate flowers 2.0– 2.5 mm long with blunt apices; anther margins not recorded; fruits length and diameter not recorded, ellipsoid, ridged, the surfaces drying pebbled, white; endocarp not recorded; endosperm not recorded.

PLATE 7 . Holotype of Iguanura mogeae .

FIGURE 12. Distribution of Iguanura mirabilis , I. mogeae , I. montana , and I. namsabiensis .

Distribution and habitat:— Indonesia (West Kalimantan) in submontane forest at 1,100 m elevation (Fig. 12).

Taxonomic notes:— It was not possible to identify the two specimens to a preliminary species. They had a unique combination of character states and are recognized as a phylogenetic species, Iguanura mogeae . This is characterized by its sheaths covered with dense, woolly indumentum, non-filiform rachillae, short staminate flowers, and ellipsoid, pebbled fruits. It also has a high elevation habitat. One of the two known specimens lacks locality data.