Geonoma chlamydostachys Galeano 1986
Creators: name: Henderson, Andrew
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Arecales
Arecaceae
Geonoma
Geonoma chlamydostachys

description: 9. Geonoma chlamydostachys Galeano (1986: 71). Type: COLOMBIA. Antioquia: Mun. San Luis, Río Claro, 400–1000 m, 13 January 1983, A. Hernández et al. 685 (holotype HUA n.v.).
Plants 1.8(1.0–3.0) m tall; stems 1.4(0.6–2.5) m tall, solitary. Leaves irregularly pinnate, not plicate, the bases of blades running diagonally into the rachis; sheaths 19.0 cm long; petioles 8.0 cm long, drying green or yellowish; rachis 44.6(36.5–57.0) cm long, 4.3(2.8–6.0) mm in diameter; veins not raised or slightly raised and triangular in cross-section adaxially; pinnae 5(3–9) per side of rachis; basal pinna 33.8(22.0–41.0) cm long, 11.6(1.8–17.0) cm wide, forming an angle of 32(23–43)° with the rachis; apical pinna 17.0(12.5–23.0) cm long, 11.7(8.4–14.5) cm wide, forming an angle of 38(32–45)° 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 7.4(5.0–9.0) cm long, not short and asymmetrically apiculate, the surfaces not ridged, without unequally wide ridges; peduncular bracts 27.4(25.0–33.5) cm long, well-developed, inserted 0.6(0.4–0.9) cm above the prophyll; peduncles 43.2(36.2– 49.0) cm long, 3.3(2.6–3.8) mm in diameter; rachillae 1, 17.9(14.5–26.4) cm long, 5.9(4.8–7.1) 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 hooded; 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 at anthesis, inserted directly onto the apiculate filament apices; anthers not short and curled at anthesis, usually elongate, spiraled and twisted or sometimes remaining straight; non-fertilized pistillate flowers deciduous after anthesis; staminodial tubes lobed at the apex, the lobes spreading at anthesis, acuminate, those of non-fertilized flowers not projecting and persistent after anthesis; fruits 12.3 mm long, 9.2 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.
Distribution and habitat:— From 7°18’– 5°33’N and 74°18’– 75°36’W in the Central Cordillera in Colombia (Antioquia), with an outlier in the Eastern Cordillera, at 890(550–1450) m elevation in lowland to montane rainforest (Fig. 11).
Taxonomic notes:— Geonoma chlamydostachys differs from similar species in the G. macrostachys clade (G. camana, G. chococola, G. deneversii, and G. maxima) in its 6 stamens; thecae diverging at anthesis and inserted directly onto the apiculate filament apices; and fruit surfaces not splitting.
Subspecific variation:— No traits vary within this species, nor is there any geographic discontinuity.
description: Published as part of Henderson, Andrew, 2011, A revision of Geonoma (Arecaceae), pp. 1-271 in Phytotaxa 17 on pages 46-48, DOI: 10.11646/phytotaxa.17.1, http://zenodo.org/record/3538362