(A) Name the three series of sub-class - Polypetalae in Bentham and Hooker's system of classifications.
(B) What ar the disitinguishing features of series-Biscarpelatae ? Name any two orders included in this series.

Explanation

(A) Sub-class-Polypertalae includes : Series (i) Thalamflorae, Series (ii) Disciflorae and series (iii) Calciflorae.
(B) Series-Bicarpellatae is characterized by possessing the following distinguishing features - (i) Flowers are hypogynous, (ii) Overy is superior with more than two carpels (usually two carpels), (iii) Stamens are either equal or twice the number of corolla lobes and free from corolla. This series includes order Ericales and Primulas.