Allium cepa L. - Vengayam

Binomial Name : Allium cepa L.

Family : Amaryllidaceae

Common Name : Onions

Tamil Name : வெங்காயம்

Leaves subdistichous fistular shorter than the inflated scape, head bearing flowers and bulbils, pedicels shorter than the stellate flowers, sepals linear-oblong, filaments exserted simple or the inner 2-toothed at the base. From Flora of China, efloras.org: Bulb solitary or clustered, applanate-globose to cylindric-ovoid; tunic purple-red, brown-red, pale brown-red, or yellow to pale yellow, papery to thinly leathery, entire. Leaves shorter than scape, 0.5--2 cm wide, terete, fistulose. Scape developed or not, if developed then to 1 m, terete, conspicuously inflated below middle, fistulose, covered with leaf sheaths only at base. Spathe 2- or 3-valved, persistent. Umbel globose, densely many flowered or with bulblets and a few flowers. Pedicels equal, ca. 5 × as long as perianth, bracteolate. Perianth chalk white or white; segments with green or pale red midvein, oblong-ovate, 4--5 × ca. 2 mm. Filaments equal, slightly longer than perianth segments, connate at base for ca. 1/5 their length, adnate to perianth segments for 1/2 of connate part; outer ones subulate; inner ones broadened at base, 1-toothed on each side. Ovary subglobose, with concave nectaries covered by hoodlike projections at base. Style slightly exserted.

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