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A secretory organ or surface modification of a floral organ in many flowers, occurring on the receptacle, in and around ovaries, on stamens, or on the perianth; secretes nectar.



the glands of a plant that secrete a sugary juice, or nectar. Nectaries are generally located in the interior of the floral cup, but they are sometimes situated outside of the flowers. The glands promote cross-pollination by attracting pollinators, primarily insects, to the flowers. (In the tropics, birds and, on rare occasions, bats serve as pollinators.)

Nectaries occur on the flower receptacle (for example, in the honeysuckle Lonicera iberica), on the interior or superior side of the sepals (in lindens), inside the spur (in nasturtiums), on the petals (in crowfeet), on the processes of the staminal connective (in violets), or at the base of the pistil (in buckwheat). In flowers that have an inferior ovary (plants of the families Umbelliferae, Dipsacaceae, and Compositae), the nectaries are located over the ovary and around the base of the styles. In some plants, flower organs (for example, the petals of meadow saffron) are converted into nectaries; in some rare cases (edelweiss and some acacias) a few flowers in the inflorescence develop into nectaries. Extra-floral nectaries are located on the basal parts of the cotyledons (in Ricinus), on the petioles (in mazzard cherry and plum), on the stipules (in vetch), on the bracts (in cotton), or on the leaflets of the involucres (in some species of Centaurea).

The cells of the tissue that elaborates nectar are for the most part small, thin-walled, and rich in protoplasm; often they constitute groups of special epidermal cells lacking cuticles (for example, the nectaries of apple blossoms). Nectar is usually secreted through the walls of the surface cells or, in some cases, through special stomata.

References in periodicals archive ?
Structure and development of bracteal nectary glands in Aphelandra (Acanthaceae).
These match Punica in size and venation pattern, and especially in the unusual thickened leaf tip which in modern Punica is an apical foliar nectary (Turner & Lersten, 1983).
A vascular plexus formed by intersecting veinlets and composed of diffused vascular tissue occurs towards the center of each nectary.
These other legume species reported from Andros are all additions to the world list (Keeler 2008), the most striking being the spiny, tiny-leaved, large-flowered Pithecellobium hystrix, with one nectary on each of its small, twice-compound leaves.
0 mm, (7)10-14(20) pairs, linear, ascending, the bases adnate, the apices rounded to acute, the pinna margins crenate or minutely notched on smaller pinnae, the basal pinnae sometimes with a basal constriction caused by the acroscopic and basiscopic margins folding toward the abaxial side, the acroscopic margin provided with a dark sunken nectary, at least on basal pinnae; adaxial lamina surfaces glabrous, hydathodes present, sunken, not white-encrusted; abaxial lamina surfaces densely scaly, the scales 0.
In more extreme cases the nectary is one-sided (Capparaceae; Capparis, Euadenia, Cadaba; Kers, 2003), or the androecium is unequal (Cleomaceae; Cleome, Dactylaena, Polanisia; Endress, 1992).
Ants typically respond by rapidly antennating around the head, tentacular organs, and dorsal nectary organ of the larvae and accepting sugar-rich secretions from the latter (Saarinen & Daniels 2006).
Rubiaceae), a favored nectar source, in a 4-L pot together with an artificial nectary (a small glass vial fitted with a cotton wick and containing a mix of honey and 20% sucrose solution).
For example, Rapateaceae present a similar range of nectary diversity, from nectaries absent to basal, slit-like nectaries present (D.
Ant visitation of extrafloral nectaries of Passiflora: the effects of nectary attributes and ant behavior on patterns in facultative ant-plant mutualisms.
Nectar is produced mainly from septal nectaries, the most common type of nectary in monocotyledons (Schmid, 1983; Stauffer et al.
Corolla nectary type: absent=0; nectar disk=1; multicellular hairs=2; unicellular hairs=3.