Geonoma maxima subsp. sigmoidea Henderson, 2011

Henderson, Andrew, 2011, A revision of Geonoma (Arecaceae), Phytotaxa 17, pp. 1-271 : 102

37i. Geonoma maxima subsp. sigmoidea Henderson , subsp. nov. (Appendix IV, Plate 51)

A subspeciebus aliis angulo pinnarum basalibus amplus differt.

Type: COLOMBIA. Amazonas: corregimiento de Araracuara, carretera a Puerto Arturo, sitio “Guácheros”, ca. 360 m, 18 September 1987, G. Galeano & J. Huitoto 1279 (holotype COL!, isotype NY!).

Leaves regularly pinnate with 3–5-veined pinnae (except for basal and apical ones), not plicate; rachis 34.1(27.5–48.5) cm long; pinnae 16(10–20) per side of rachis; basal pinna 0.3(0.2–0.6) cm wide, forming an angle of 70(50–87)° with the rachis. Inflorescences rachillae 28(16–42).

Distribution and habitat:— From 0°04’N– 1°18’S and 72°05’– 72°52’W in the western Amazon region in Colombia (Amazonas, Caquetá) at 270(200–360) m elevation in lowland rainforest ( Fig. 27 ).

One specimen (Galeano 2080) has larger leaves and exceptionally large fruits (13.3 cm long and 11.5 cm diameter), and may be a hybrid with a morphotype of subsp. chelidonura .

Figures

FIGURE 27. Distribution maps of Geonoma maxima subsp. sigmoidea and G. maxima subsp. spixiana.