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Glossary of terms used on this site

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Term Definition

The blade of a leaf, usually flattened, dorsiventral, and expanded, often with a midrib, cf. hyperphyll, leaf base, petiole, stipule, Vorläuferspitze, see admedial, exmedial (positional terms); the lamina margin often with teeth, see also biserrate, crenate, dentate, entire, serrate, sinuate, undulate, see also venation.


Woolly; covered with something resembling wool


Tapering from a rounded base toward an apex; lance-shaped: lanceolate leaves.


A membranous or hairy appendage on the adaxial surface of a bifacial leaf, at the junction between sheath and blade, especially in grasses, or a similar structure at the junction of two parts of a petal, e.g. claw and limb (see also corona); also, an adaxial appendage near the leaf base in some monocots and in Selaginellaceae, etc.; adj. ligulate.


Very narrow in relation to the length, and with the sides parallel.


Of the apex of any laminar structure, e.g., petal, leaf blade, divided more than 25% the length of the structure, cf. emarginate, retuse.

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Mauricio Diazgranados @ 2013. Postdoctoral researcher | Botany | NMNH | Smithsonian Institution 
Website: http://www.mauricio-diazgranados.com/ | Email: espeletias@gmail.com

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Photo Gallery of Espeletiinae

With 5000 pics, this is the World's largest collection of photographs of Espeletiinae (a.k.a. frailejones). Check it out HERE!