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Harmsiopanax ingens is a very spiny palmlike mesocaul tree in the family (Araliaceae), endemic to the montane rainforests of central New Guinea which bears a terminal rosette of deeply lobed, dentate margined, usually (but not invariably) peltate leaves 1 m (3 ft 3 in) across, maple-like in shape, on equally long petioles. It ultimately attains a height of 18 m (59 ft), at which point it bears a huge panicle of flowers 5 m (16 ft) high and equally wide; the largest above ground inflorescence of any dicot plant (although Caloncoba flagelliflora of West Africa, Ficus geocarpa of the Malay Peninsula, and Ficus uncinata var. strigosa also of Malaya have larger subsurface panicles, each about 9 m (30 ft) in length). The panicles of H.
Text excerpted from the Wikipedia article Harmsiopanax ingens by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
