pistillode


Also found in: Thesaurus, Wikipedia.
Related to pistillode: simple pistil

pistillode

(ˈpɪstɪləʊd)
n
(Botany) botany a sterile pistil, or one with a simple structure and reduced size and function
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pistillode - a sterile vestigial pistil remaining in a staminate flower
pistil - the female ovule-bearing part of a flower composed of ovary and style and stigma
Mentioned in ?
References in periodicals archive ?
111 Nectary on dorsal or lateral sides of carpel or pistillode (0) absent, (1) present.
Male flowers: to 4-5 mm wide at anthesis; sepals (4)5(6), triangular, red tipped, <1 mm long, petals (4)5(6), broadly lanceolate, 1 mm long, 0.5 mm wide; stamens to 1.5 mm long, twice as much as petals, in two series, opposite and alternate to petals, filaments inserted on edge of annular, papillose disk; pistillode <1 mm long, reduced and rarely functional.
Staminate flower with 3 sepals, these ovate, acuminate, 0.9-1.4 mm long, connate basally in 0.2-0.3 mm, not reaching the total length of corolla tube, petals 3, ovate to rhomboid, fleshy, 4.5-5.5 mm long including an acumen of 0.4-1 mm long, connate basally in 2-3 mm, stamens 6, conspicuously exserted from the petals, alternating 1 antisepalous stamen and 1 antipetalous stamen, filament tapered, 1.5-2 mm long, basally inflated and 0.4-1 mm thick, connected to anther at proximal 1/4-1/3 of its length, anthers 4.5-6.5 mm long, thecae separated in the proximal 1/4 of their length, connective not projected, pistillode trifid, 0.7 mm long.
0.5 mm long, anthers slightly longer than wide, 0.4-0.7 x 0.5-0.7 mm; pistillode minute, sunken into the swollen, 0.7-0.8 mm thick receptacle.
Staminate inflorescences capitate, 10-12 flowered in a single raceme, peduncle to 10 mm long, pedicels up to 1 mm long; perianth campanulate, 6 mm long, 6-lobed, each lobe 1 mm long; stamens 6 alternate with perianth lobes, anthers bilocular, dorsifixed, elliptic < 1 mm diameter, extrorse, generally 1 or 2 reduced to staminodes; the fine filaments connate basally, borne at the base of a pistillode 3 mm long; lower part of the perianth reduced to 2 or 3 small involucral bracts; indumentum densely short velutinous.
Staminate flower with 3 sepals 0,5-0,7 mm long; petals 3, 2,5-3 mm long, connate in the proximal part; stamens 6, anthers 1-1,2 mm long, filaments 1,5 mm long; pistillode minute, 3-parted.
The presence of dioecy in the family has been supported on morphological evidence, i.e.: two floral morphs residing on different individuals and an apparent lack of functionality of the pistillode and the staminodes), but functional dioecy has not been tested in the field.
A typical palm flower is small (1-2 cm), with 3 imbricate sepals, 3 valvate petals, six stamens or staminodes, and 3 uniovulate carpels or a trifid pistillode. Flowers are arranged into clusters (sympodial, dyad, triad, acervulus), well exposed and relatively open to pollinators (Henderson, 1986; Silberbauer, 1990; Dransfield et al., 2008).