Geonoma poiteauana (Geonoma poiteauana)

Description

Palms 1.2 (0.5-2.0) m tall; stems 0.1 m tall, 2.1 cm in diameter, branching no data, not cane-like; internodes 0.2 cm long, not scaly. Leaves undivided or irregularly pinnate, not plicate, bases of blades running diagonally into the rachis; sheaths 13.7 (12.0-17.0) cm long; petioles 21.6 (18.0-26.7) cm long, drying green or yellowish; rachis 57.0 (38.0-79.5) cm long, 4.2 (3.1-5.9) mm in diameter; adaxial veins not raised or slightly raised and triangular in cross-section adaxially; pinnae 2 (1-3) per side of rachis; basal pinna 51.8 (42.0-64.0) cm long, 16.6 (9.0-26.0) cm wide, forming an angle of 11 (5-22)° with the rachis; apical pinna 33.4 (30.0-38.0) cm long, 16.9 (9.5-31.5) cm wide, forming an angle of 18 (10-24)° with the rachis. Inflorescences unbranched; prophylls and peduncular bracts ribbed with elongate, unbranched fibers, both bracts tubular, narrow, elongate, closely sheathing the peduncle, more or less persistent; prophylls 10.4 (6.0-13.2) cm long, not short and asymmetrically apiculate, the surfaces not ridged, without unequally wide ridges; peduncular bracts 23.4(19.0-28.35) cm long, well-developed, inserted 0.9 (0.5-2.0) cm above the prophyll; peduncles 80.2 (54.5-119.5) cm long, 2.9 (1.3-3.7) mm in diameter; rachillae 1, 13.2 (8.5-20.0) cm long, 4.8 (3.1-6.0) mm in diameter, the surfaces without spiky, fibrous projections or ridges, drying brown or yellow-brown, without short, transverse ridges, not filiform and not narrowed between the flower pits; flower pits spirally arranged, glabrous internally; proximal lips with a central notch before anthesis, often the two sides of the notch overlapping, not recurved after anthesis, not hood-shaped; proximal and distal lips drying the same color as the rachillae, not joined to form a raised cupule, the proximal lip margins overlapping the distal lip margins; distal lips well-developed; staminate and pistillate petals not emergent, not valvate throughout; staminate flowers deciduous after anthesis; stamens 6; thecae diverging or not diverging at anthesis, inserted onto well-developed, non-split, jointed connectives, connectives alternately long and short; anthers short at anthesis, remaining straight and parallel; non-fertilized pistillate flowers deciduous after anthesis; staminodial tubes lobed at the apex, the lobes spreading at anthesis, acuminate, those of non-fertilized pistillate flowers not projecting and persistent after anthesis. Fruits 8.8 (7.9-9.5) mm long, 7.2 (6.4-8.0) mm in diameter, the bases without a prominent stipe, the apices not conical, the surfaces not splitting at maturity, without fibers emerging, not bumpy, not apiculate; locular epidermis with operculum, smooth, with pores. (Henderson, A.J. (2011) A revision of Geonoma. Phytotaxa 17: 1-271.)/Palmweb. Editing by edric.