Geonoma epetiolata

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Geonoma (geo-NO-mah)
epetiolata (eh-peht-ee-oh-LAH-tah)
Omar Torrijos National Park in Panama. Photo by Mario Blanco.
Scientific Classification
Genus: Geonoma (geo-NO-mah)
epetiolata (eh-peht-ee-oh-LAH-tah)
None set.
Native Continent
Habit: Solitary & clustering.
Leaf type: Pinnate
Survivability index
Common names
Stained-glass Window Palm.

Habitat and Distribution

Costa Rica, Panamá.
In habitat. Photo by Lance Merry.
From 8°31-10°23'N and 79°16-84°06'W in Costa Rica and Panama at 557(300-1200) m elevation in lowland to montane tropical rainforest.


Palm 1.4 (0.6-3.0) m tall; stems 1.6 (0.5-3.0) m tall, 0.7 (0.5-1.1) cm in diameter, solitary or clustered, canelike; internodes 1.2 (0.6-2.6) cm long, yellowish and smooth. Leaves 9 (8-10) per stem, undivided, not plicate, bases of blades recurved against the rachis; sheaths 5.8 (3.0-8.2) cm long; petioles absent; rachis 34.1 (18.8-50.5) cm long, 4.5 (2.2-7.5) mm in diameter; veins raised and rectangular in cross-section adaxially; pinnae 1 per side of rachis; basal pinna forming an angle of 14(4-24)° with the rachis; apical pinna 9.0 (5.2-14.0) cm long, forming an angle of 30 (16-45)° with the rachis. Inflorescences unbranched; prophylls and peduncular bracts ribbed with elongate, unbranched fibers, both bracts tubular, narrow, elongate, closely sheathing the peduncle, more or less persistent; prophylls 8.9 (7.0-12.7) cm long, not short and asymmetrically apiculate, the surfaces not ridged, without unequally wide ridges; peduncular bracts 7.6 (7.0-8.7) cm long, welldeveloped, inserted 2.5 (1.0-5.6) cm above the prophyll; peduncles 10.2 (5.0-15.0) cm long, 2.3 (1.3-3.2) mm in diameter; rachillae 1, 20.3 (9.0-38.0) cm long, 3.4 (1.7-4.9) 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 usually spirally arranged, sometimes tricussately, then the groups not closely spaced nor consistently arranged throughout the rachillae, glabrous internally; proximal lips without a central notch before anthesis, not recurved after anthesis, not hood-shaped; proximal and distal lips drying the same color as the rachillae, not joined to form a raised cupule, the proximal lip margins overlapping the distal lip margins; distal lips well-developed; 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 lobed, the lobes not spreading at anthesis, not acuminate, those of non-fertilized flowers not projecting and persistent after anthesis. Fruits 8.6 (7.3-9.9) mm long, 5.1 (4.7-5.3) mm in diameter, the bases without a prominent stipe, the apices not conical, the surfaces not splitting at maturity, without fibers emerging, not bumpy, not apiculate, ridged from the numerous, subepidermal, meridional, elongate fibers present, these coming to a point at fruit apices; locular epidermis without operculum, smooth, without pores. (Henderson, A.J. 2011)/Palmweb. Editing by edric.


Still extremely rare in cultivation, because seeds are hard to find and are said to be somewhat difficult to germinate. The Stained Glass Palm does best in a humid, tropical climate and needs a protected spot out of direct sun.

Comments and Curiosities

External Links


Phonetic spelling of Latin names by edric.

Special thanks to Geoff Stein, (Palmbob) for his hundreds of photos.

Special thanks to, Dr. John Dransfield, Dr. Bill Baker & team, for their volumes of information and photos.

Glossary of Palm Terms; Based on the glossary in Dransfield, J., N.W. Uhl, C.B. Asmussen-Lange, W.J. Baker, M.M. Harley & C.E. Lewis. 2008. Genera Palmarum - Evolution and Classification of the Palms. Royal Botanic Gardens, Kew. All images copyright of the artists and photographers (see images for credits).

Henderson, A.J. 2011. A revision of Geonoma. Magnolia Press.

Many Special Thanks to Ed Vaile for his long hours of tireless editing and numerous contributions.

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