I04 CLASSIFICATION OF DICOTYLEDONS 



Class II. : Monocotyledons. — Seedling has one cotyledon. 

 Leaves parallel-veined. Floral leaves in threes. 



Class I.: dicotyledons 



Sub-Class I. : APETAL^. Petals absent. 



I 



1. CupulifercB. Flowers epigynous diclinous. $ flowers 



in catkins. Fruit ' in dehisjcent one-seeded. Trees or 

 shrubs. 



2. SalicacecE. Flowers hypogynous diclinous. $ flowers in 



catkins. Fruit dehiscent with many seeds. Trees or 

 shrubs. 

 [3. Euphorbiacece.* Flowers diclinous. In the fruit the three 

 (sometimes two) carpels separate and open ; one or two 

 seeds in each chamber.] 



Sub-Class II. : POLYPETAL.^. Corolla polypetalous. 



I. Thalamiflorse. — Flowers hypogynous without 

 a well-developed disk. 



(a) GyncRcium apocarpous. 



4. Ranunculacea" Stamens indefinite, 



(b) Ovary syncarpous with parietal placentation. 



5. Papaveracea. Flowers actinomorphic. Sepals and petals 



in twos or threes. Stamens indefinite. 



6. Fumariacece. . Flowers zygomorphic. Sepals and petals 



in twos. 



7. Cruciferm'. Flowers actinomorphic. Sepals and petals 



four each. Stamens two short and four long. 



8. ViolacecB. Flowers zygomorphic. K5 C5 A5 G (3). 



(c) Ovary syncarpous. Placentation free-central. 



9. Caryophyllacea . Flowers actinomorphic. Stamens ten 



or fewer. 



* This is not the correct systematic position of the Euphorbiacese ; 

 but the family is placed here because it is easier for beginners to identify 

 plants belonging to it when it is classed amongst the Apelalje. 



