Iguanura namsabiensis Henderson, Mu Mu Aung & Armstrong (2020: 77)

Henderson, Andrew, 2025, A revision of Iguanura (Arecaceae, Arecoideae, Areceae), Phytotaxa 690 (2), pp. 135-188 : 171

22. Iguanura namsabiensis Henderson, Mu Mu Aung & Armstrong (2020: 77) . Type:— MYANMAR. Sagaing Region, Hkamti District, Homalin Township, just outside Htamanthi Wildlife Sanctuary, Nam Sa Bi Village Management Area, 25˚19’2.7”N 95˚21’52.2”E, 155 m, 25 September 2016, K. Armstrong, Thet Yu Nwe, Phyu Hnin, Kyaw Zin Aung, Win Zaw Myint, Lin Zaw, Han Sein Myint & Phoe La Pyae 1596 (holotype NY-02654852!, NY-02654875!, isotypes E n.v., RAF n.v.).

Stems length, diameter, and branching not recorded. Leaf sheaths not recorded; ocreas well-developed, separating early into fibers and disintegrating; petioles 14.0 cm long; rachises 89.0 cm long; leaf blades divided, deeply bifid at the apices; leaf veins diverging; adaxial leaf veins not prominent adaxially, triangular in cross-section; pinnae number not recorded; middle pinna 31.7 cm long, 4.3 cm wide. Inflorescences branched to 1 order; prophylls and peduncular bracts inserted close together at base of peduncle and both early deciduous before anthesis; peduncles 2.2 cm long, not wooly tomentose; rachises length not recorded; rachillae 9, 23.2 cm long, 2.3 mm diameter, widely diverging from the rachis, glabrous or sparsely tomentose, not filiform; rachilla bracts not elongate; distal triad bracteoles scarcely developed or absent; distal part of flower pits glabrous; staminate flowers not recorded; anther margins not recorded; fruits size not recorded, ellipsoid, not ridged, with a pebbled surface, color not recorded; endocarp not recorded; endosperm not recorded.

Distribution and habitat:—Northern Myanmar in primary forest at 155 m elevation (Fig. 12).

Taxonomic notes:— Preliminary species Iguanura namsabiensis had a unique combination of character states and is recognized as a phylogenetic species. It is characterized by its prophylls and peduncular bracts inserted close together at base of peduncle and both early deciduous before anthesis, and ellipsoid fruits.