Geonoma frontinensis Burret, Bot. Jahrb. Syst. 63: 170 (1930)

Primary tabs

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Distribution

Map uses TDWG level 3 distributions (http://www.nhm.ac.uk/hosted_sites/tdwg/geogrphy.html)
From 1°12-7°14'N and 73°58-77°00'W on eastern slopes of the Western, Central, and Eastern Cordilleras in Colombia at 1560(1000-2030) m elevation in montane rainforest. (Henderson, A.J. (2011) A revision of Geonoma. Phytotaxa 17: 1-271.)A

Discussion

  • Taxonomic notes: - See notes under Geonoma euspatha.

    Subspecific variation: - Three traits vary within this species (stem branching, leaf division, inflorescence branching). There is geographic discontinuity, but too few specimens to test for differences between areas. (Henderson, A.J. (2011) A revision of Geonoma. Phytotaxa 17: 1-271.)A

Description

  • Plants 1.1(0.5-2.0) m tall; stems 0.2(0.2-0.3) m tall, solitary or clustered; internodes no data. Leaves 6(4-8) per stem, undivided or irregularly pinnate, not plicate, bases of blades running diagonally into the rachis; sheaths 30.0 cm long; petioles 68.8(26.0-110.0) cm long, drying green or yellowish; rachis 40.0(22.5-65.0) cm long, 3.3(2.0-4.5) mm in diameter; veins raised and rectangular in cross-section adaxially; pinnae 5(1-8) per side of rachis; basal pinna 35.5(19.0-47.5) cm long, 3.6(0.3-8.7) cm wide, forming an angle of 46(30-61)° with the rachis; apical pinna 24.8(19.0-30.0) cm long, 9.8(2.0-21.5) cm wide, forming an angle of 26(20-34)° with the rachis. Inflorescences unbranched or branched 1 order; prophylls and peduncular bracts not ribbed with elongate, unbranched fibers, persistent; prophylls 19.8(13.4-26.2) cm long, not short and asymmetrically apiculate, the surfaces not ridged, without unequally wide ridges; peduncular bracts 20.2(14.3-26.5) cm long, well-developed, inserted 9.7(4.0-17.0) cm above the prophyll; peduncles 37.4(21.0-58.0) cm long, 2.9(1.6-4.5) mm in diameter; rachillae 2(1-4), 14.7(7.5-20.5) cm long, 3.9(2.9-5.2) mm in diameter, the surfaces without spiky, fibrous projections or ridges, drying brown or yellow-brown, without short, transverse ridges, not filiform and not narrowed between the flower pits; flower pits spirally arranged, densely hairy internally proximally and distally; proximal lips without a central notch before anthesis, not recurved after anthesis, hood-shaped at anthesis, sometimes splitting post-anthesis; proximal lips drying the same color as the rachillae; distal lips absent; staminate and pistillate petals not emergent, not valvate throughout; staminate flowers deciduous after anthesis; stamens 6; thecae diverging at anthesis, inserted almost directly onto the filament apices, the connectives bifid but scarcely developed; anthers short and curled over at anthesis; non-fertilized pistillate flowers persistent after anthesis; staminodial tubes crenulate or shallowly lobed at the apex, those of non-fertilized pistillate flowers not projecting and persistent after anthesis. Fruits 6.7(6.0-8.4) mm long, 5.1(4.8-5.3) mm in diameter, the bases without a prominent stipe, the apices not conical, the surfaces not splitting at maturity, without fibers emerging, bumpy from the numerous, subepidermal, tangential, short fibers present, these coming to a point at fruit apices; locular epidermis without operculum, sculpted, usually also with a raised, meridional ridge, without pores. (Henderson, A.J. (2011) A revision of Geonoma. Phytotaxa 17: 1-271.)A