Q.Where will you place the plants which contain two cotyledons with cup shaped thalamus ?
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Start your 14-day free trial to unlock the full solution →Dicot plants having two cotyledons and a cup-shaped thalamus are classified under the Series Calyciflorae (e.g., family Rosaceae) in Bentham and Hooker's system.
Bentham and Hooker's system of classification, one of the classical natural systems used for flowering plants, divides the class Dicotyledonae into three series, based largely on the arrangement and fusion of floral parts, including the shape of the thalamus (the receptacle on which the floral whorls are inserted):
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Series Thalamiflorae: thalamus flat or conical (elongated), petals free (polypetalous), stamens hypogynous (arising below/around the ovary directly from the thalamus).
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Series Calyciflorae: thalamus cup-shaped, disc-shaped, or cup/concave in form; sepals, petals, and stamens are typically borne on the rim of this cup- or disc-shaped thalamus, often around a perigynous or epigynous ovary. This series includes families such as Rosaceae, Leguminosae (Fabaceae), Myrtaceae, and Combretaceae.
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Series Corolliflorae: petals fused (gamopetalous), stamens epipetalous (attached to the petals).
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