Description of commonly observed plants of different families mostly from western ghats.
Thursday, 10 January 2008
Amaranthaceae
Out of the 315 odd families some 50to 60 are commoner and more important.
This week's family is
Amaranthaceae.Cockscomb family.
Greek amarantos : unfading....long lasting flowers.
India and tropical America are chief distribution centres.
Large family--Includes some garden plants and pot herbs.
Vegetative characters :annual or perennial herbs,shrubs and rarely erect or climbing shrubs.
Stems often show abnormal secondary growth.
Leaves:alternate or opposite exstipulate,simple usually entire.
Flowers and Inflorescences:Small flowers are aggregated into simple or branched panicles spike s heads or cymes.Flowers are actinomorphic,bisexual or frequently unisexual,pentamerous and hypogynous.
Calyx-5 free basally connate sepals.
Petals are absent.Stamens are 5 and areopposite the sepals.
Sometimes nectar secreting disc is present.(bosia)
Pollination and dispersal:Nectar disc and showy flowers ==>insectpollination
Gomphrena--winged fruits=>dispersal by wind.Achyranthus Cyathula and Pupalia develop hooks on sepals which adhere to passing animals and humans.
Economic Importance:Little.
Few are used as food.
Examples:
Amaranthus (Mar.Chavalai)Leafy vegetable.
Celosia argentea:spikes attract butterflies,Tender shoots are cooked and eaten
Alternanthera tenella and A.sessilis are common weeds.
Gomphrena globosa.
Achyranthus aspera (Aghada)
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