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Glossary of terms used on this site

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Term Definition

A structure varying in its morphological nature that looks like a small calyx, see in particular epicalyx.


E.g. of a polysymmetric corolla, bell-shaped, broadly tubular and then gradually widening towards the more or less spreading lobes, cf. rotate, infundibular, salverform, tubular, urceolate.


An inflorescence with sessile flowers aggregated into a dense cluster, whether a racemose (more usual) or cymose, sometimes made up of disc and ray flowers, cf. botryoid, corymb, fascicle, raceme, spike, thyrse, umbel




Papery in texture, cf. coriaceous, papyraceous, scarious.


Ash-grey, as of wood ash.


The base of the hypocotyl, sometimes marked by an external line or a swollen area and/or bearing collar rhizoids adjoining and hypocotyl in the embryo or seedling, see epiblast, periblast, also cotyledon, eophyll, epicotyl, mesocotyl, plumule, primary leaf, of a monocot seedling, see also mesocotyl, coleorhiza, hyperphyll (apocole, haustorium/scutellum, phanomer), hypophyll (cotyledonary sheath, coleoptile).


Of axillary branching, a kind of metatopic growth where the bud as it were shifted up the stem, being fused with the axis that bears it, the result is that it is borne way above the subtending leaf, cf. recaulescent, also epicaulescent.


Having a surface or boundary that curves or bulges outward, as the exterior of a sphere.


Leathery in texture, cf. chaffy, chartaceous, papyraceous, scarious.


The petals of a flower collectively, cf. androecium, calyx, gynoecium, perianth.


A racemose inflorescence in which the pedicels of the lower flowers are longer than those of the flowers above, bringing all flowers to about the same level, cf. botryoid, fascicle, raceme, spadix, spike, thyrse, umbel.


Of margins with small, rounded teeth or scalloped, dim. crenulate, cf. biserrate, dentate, entire, serrate, sinuate, undulate.


Wedge-shaped, the sides straight and coming to a point, the angle made being less than 90o, cf. acute, attenuate, acumen, apiculum, arista, awn, caudate, cuspidate, emarginate, mucronate, muticous, obtuse, retuse, rounded, truncate, cf. also cordate, hastate, oblique, runcinate, sagittate (esp. of lamina base).


Of an sympodial inflorescence, with the apex of the stem axis converted into a flower, but further flowers arising successively from the axils of the bracteole/prophyll (monocots) or bracteoles/prophylls (most BLAs) immediately below it, and so on, adj. cymose, a cymule is a diminutive cyme, often used for part of an inflorescence, usually few-flowered, see dichasia and monochasia (basic types), and drepanium, helicoid cyme, rhipidium, scorpioid cyme (variants), and bicolor unit and cyathium (modifications in particular families), see also botryoid, corymb, fascicle, cf. raceme.

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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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