Leaves 4.5-12.5 cm long; petiole 3-15 mm long; pulvinus 1.3-2.2 mm diam; rachis 3.6-8.2 cm long, interfoliolar segments 0.6-2 cm long; extrafloral
nectaries 3-7, claviform and fusiform, stipitate, located between all pairs of leaflets, occasionally absent in the proximal pair or 0-2 in the distal, 2-3 x 0.2-0.6 mm; leaflets 3-7 pairs, chartaceous, adaxial surface strigose, the distal 10-50 x 4-23 mm, the proximal 10-40 x 4-12 mm, elliptic, lanceolate, oblong, ovate and oval-lanceolate, venation craspedodromous, nervures 9-11 pairs, apex acute, acute-mucronate, obtuse, obtuse-mucronate, acuminate and rarely emarginate, base oblique and subcordate, margin revolute, ciliated.
Some authors cite that flowers of fennel have exposed floral
nectaries (Patt et al., 1997a, b), which might indicate a deviation of the insects' attention to obtain nectar instead of pollen, depending on the physiological condition and nutritional demands of the confined individuals.
(2009) postulated that extra floral
nectaries, mostly frequent on the leaf margins (Rezende 1998), might influence the Eurytoma sp.
"I love the singled flowered varieties, particularly the ones with pure white rounded petals with dark magenta
nectaries (centres)."
DESCRIPTION OF EXTRAFLORAL
NECTARIES FOUND ON YARD-LONG BEANS, VIGNA UNGUICULATA L.
The function of extrafloral
nectaries in Aphelandra deppeana Schl.
Apple JL, Feener DH (2001) Ant visitation of extrafloral
nectaries of Passiflora: The effects of nectary attributes and ant behavior on patterns in facultative ant-plant mutualisms.
It has
nectaries, normal leaf shape, and exhibits a semi-cluster fruiting pattern.
Nectaries are located at the base of the flowers, and nectar is produced at a rate of 1-5 [[micro]liter] of nectar[center dot][flower.sup.-1][center dot][d.sup.-1], with a concentration of 20-25% sucrose equivalents (Pleasants 1983).
The team also looked at--and dismissed--another proposed explanation: that
nectaries lure creatures which some how disperse fern spores.
Scientists term the inconspicuous storehouses "extrafloral
nectaries" because they're located away from flowers--the usual source of nectar.
102) proposed that "The plants which produced flowers with the largest glands or
nectaries, excreting most nectar, would oftenest be visited by insects, and would oftenest be crossed; and so in the long run would gain the upper hand and form a local variety." Surprisingly, this idea has seldom been tested but see Zimmerman, 1988; Pyke et al., 1988).
Leaf chemical composition, such as lignin, cellulose, and fiber contents, and the presence of tannins and extrafloral
nectaries, may influence the occurrence and distribution of phytophagous insect (Peeters 2002).
Leaflets with both surfaces lepidote; calyx bilabiate, lepidote, without
nectaries; corolla yellow with red or brown nectar guides on the fauces ...
