29d. Geonoma interrupta subsp. rivalis (Kalbreyer & Burret) Henderson, comb. & stat. nov.

Basionym: Geonoma rivalis Kalbreyer & Burret in Burret (1930a: 241) . Type: COLOMBIA. Antioquia: Coco, 700–900 m, 18 February 1880, W. Kalbreyer 1427 (holotype B, destroyed). Neotype (here designated): COLOMBIA. Antioquia: Mun. San Luis, Río Samana on the Medellín-Bogotá road, 6°00’N, 74°50’W, 700–780 m, 23 June 1987, R. Callejas, A. Arbelaez, H. Correa & J. Betancur 4098 (neotype NY!, isoneotypes HUA, n.v., MO!).

Leaves pinnae 31(27–36) per side of rachis. Inflorescences peduncular bracts inserted 2.6(1.0–4.5) cm above the prophyll; non-fertilized pistillate flowers persistent after anthesis.

Distribution:— From 5°50’– 7°22’N and 74°45’– 75°05’W on the eastern slopes of the Central Cordillera in Colombia, at 548 (150–900) m elevation in lowland rainforest (Fig. 21). Plants are reported to be rheophytes.

There is geographic discontinuity but too few specimens to test for differences amongst areas.