Geonoma maxima subsp. ambigua (Spruce) A.J.Hend., Phytotaxa 17: 98 (2011)

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Distribution

From 1°55-8°34'N and 57°52-62°55'W in Guyana and adjacent Venezuela and Brazil at 337(35-900) m elevation in lowland rainforest in a variety of habitats, including flooded and non-flooded areas.
(Henderson, A.J. (2011) A revision of Geonoma. Phytotaxa 17: 1-271.)A

Discussion

  • A specimen from Guyana (McDowell 4479) has more pinnae than others and approaches subsp. maxima in its leaf morphology. Although subsp. ambigua has fewer pinnae per side of the rachis than subsp. maxima, it usually has a few, 1-veined pinnae present. (Henderson, A.J. (2011) A revision of Geonoma. Phytotaxa 17: 1-271.)A

Description

  • Leaves irregularly pinnate (sometimes with 1-veined pinnae present), not plicate; rachis 40.0(13.0-59.0) cm long; pinnae 4(2-12) per side of rachis; basal pinna 7.5(1.9-22.0) cm wide, forming an angle of 40(20-60)° with the rachis. Inflorescences rachillae 18(5-39). (Henderson, A.J. (2011) A revision of Geonoma. Phytotaxa 17: 1-271.)A

Bibliography

    A. Henderson, A.J. (2011) A revision of Geonoma. Phytotaxa 17: 1-271.