Geonoma pinnatifrons subsp. pinnatifrons

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Distribution

Map uses TDWG level 3 distributions (http://www.nhm.ac.uk/hosted_sites/tdwg/geogrphy.html)
Colombiapresent (Henderson, A.J. (2011) A revision of Geonoma. Phytotaxa 17: 1-271.)A
Ecuadorpresent (Henderson, A.J. (2011) A revision of Geonoma. Phytotaxa 17: 1-271.)A
Panamápresent (Henderson, A.J. (2011) A revision of Geonoma. Phytotaxa 17: 1-271.)A
Venezuelapresent (Henderson, A.J. (2011) A revision of Geonoma. Phytotaxa 17: 1-271.)A
From 2°43'S-11°10'N and 63°25-78°12'W in Venezuela, Colombia, and Ecuador, and just reaching eastern Panama, at 898(30-1900) m elevation in lowland to montane rainforest. (Henderson, A.J. (2011) A revision of Geonoma. Phytotaxa 17: 1-271.)A

Discussion

  • There is geographical variation in this subspecies. Regression shows there are significant (P <0.05) associations between elevation and three leaf and three inflorescence variables. Squared multiple R for the regression of petioles on elevation is 0.57, basal pinna length 0.27, basal pinna width 0.28, prophyll length 0.39, rachilla length 0.27, and fruit length 0.23. Petioles become shorter, basal pinna shorter and narrower, prophyll and rachillae shorter, and fruits longer with increasing elevation. Clustered-stemmed plants occur commonly in this subspecies in Venezuela, and these occur at a higher mean elevation (1170 m) than those with solitary stems (677 m). (Henderson, A.J. (2011) A revision of Geonoma. Phytotaxa 17: 1-271.)A

Description

  • Leaf pinnae 11(3-39) per side of rachis. Inflorescences peduncular bracts inserted 2.8(0.6-6.5) cm above the prophyll; peduncles 25.2(11.0-41.0) cm long, 7.5(3.6-12.9) mm in diameter; rachillae 15.2(8.6-25.7) cm long, 2.2(1.1-3.4) mm in diameter fruits 5.0(3.6-6.3) mm in diameter. (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.