Flower structure 6 Maize m male inflorescence aize




Дата канвертавання28.04.2016
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Flower structure 6 - Maize
M


male inflorescence
aize
(Zea mays) The flowers are unisexual,

containing either stamens or ovary but not both.

The long, crowded inflorescences bear flowers of

only one sex. The male inflorescences are on

terminal branches and the female inflorescences are

lower down, on lateral branches. The male flowers

are small, and enclosed by green, leaf-like bracts.

The flowers are in pairs; each pair is called a



spikelet which is enclosed by two bracts. Two

smaller bracts enclose three stamens. When mature,

t
female inflorescence
he anthers hang outside the bracts.

The female inflorescence is completely wrapped

in a small number of leaves and forms the ‘cob’.

The female spikelets are arranged spirally on the

inflorescence stalk. Each flower is enclosed by

thin transparent bracts. The female flower

consists of an ovary with a single ovule, and a long

style which protrudes from the top of the cob.

Maize is a cereal of considerable economic

importance. It is closely related to wild grasses

whose flowers differ from it by having both male

a
leaf base encircles stem


nd female organs.

root


system


Maize plant

to show position of male and

female inflorescences


anther




bracts enclosing a pair of flowers and forming a spikelet



Part of male inflorescence

© D.G. Mackean


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