Botanical description of Allium
cepa
(In APG classification, Allium cepa is placed under the family Amaryllidaceae)
Habit: Perennial
herb with bulb.
Root: Fibrous
adventitious root system
Stem: Underground
bulb
Leaf: a cluster
of radical leaves emerges from the
underground bulb, cylindrical and fleshy having sheathy leaf bases with
parallel venation.
Inflorescence:
Scapigerous i.e. the inflorescence
axis (peduncle) arising from the ground bearing a cluster of flowers at its
apex. Pedicels are of equal length, arising from the apex of the peduncle which
brings all flowers at the same level.
Flower: Small,
white, bracteate, ebrcteolate,
pedicellate, complete, trimerous, actinomorphic and hypogynous. Flowers are
protandrous.
Perianth:
Tepals 6,
white,arranged in two whorls of
three each, syntepalous showing valvate aestivation.
Androecium:
Stamens
6, arranged in two whorls of three
each, epitepalous, apostamenous /free and opposite to tepals. Anthers
dithecous, basifixed, introse, and dehiscing longitudinally.
Gynoecium:
Tricarpellary
and syncarpous. Ovary superior,
trilocular with two ovules in each locule on axile placentation. Style simple,
slender with simple stigma.
Fruit: A
loculicidal capsule.
Seed: Endospermous
Floral
Formula:
Related Topics
Privacy Policy, Terms and Conditions, DMCA Policy and Compliant
Copyright © 2018-2024 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.