Nurturing Life Sciences
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#XL - R Botany
Thyrsus
“Racemes of cymes”
Lateral pedicillate
Ex- Ocimum, Anisomeles (Sweet basils
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Verticil or verticillaster
main axis two lateral sessile cymes at the axil of node
Ex- Leonotis, Leucas
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Special Inflorescence;
a. Cyathium
b. Hypanthodium
c. Coenanthium
Cyathium;
small unisexual flowers enclosed by a common involucre which mimics a single flower.
Male flowers = scorpioid manner and is represented only by stamens Female flower is solitary and centrally located on a long pedicel and is represented only by pistil
Ex- Pedilanthus
Hypanthodium
Receptacle is closed except a small opening called ostiole which is covered by a series of bracts.
Example: Ficus sp. (Banyan and Pipal)
Coenanthium
Circular disc like fleshy open receptacle that bears pistillate flowers at the center and staminate flowers at the periphery.
Ex: Dorstenia
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The flower
Perfect flowers have both an androecium and a gynoecium
Imperfect flowers have one or the other and are termed pistillate if they contain female reproductive structures or staminate if only male reproductive structures
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Symmetry of flowers
actinomorphic (radial symmetry).
Example; Mustard, datura, chilli.
(Brassicaceae, Solanaceae and Liliaceae family)
zygomorphic (bilateral symmetry).
Example; pea, gulmohur, bean, Cassia.
(Fabaceae family)
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Flower is asymmetric (irregular)