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SUMMARY OF AUTUMN FLOWERS. 



[I. GKOUPS AND ORDERS.] 

 EXOGENOUS PLANTS or DICOTYLEDONS. 



Leaves with netted veins. Flowers usually quinary the 

 parts in fives,, or quaternary the parts in fours. Embryos 

 with two (rarely more) cotyledons hence dicotyledonous. 



Thalamiflores : Polypetalous dichlamydeous plants, with 

 the petals distinct (separable) from the calyx, and the stamens 

 hypogynous ; Orders numbered 1 to 7. 



* Ovary apocarpous. 



1. Rammculaceous plants herbs or climbing shrubs ; stamens 



indefinite, inserted on the receptacle. 



** Ovary syncarpous. 



t Placentas parietal (i.e. seeds attached to sides of carpels). 

 % Stamens six, united in two sets. 



2. Pumariaceous plants herbs ; flowers very irregular, with 



two sepals and four petals. 



JJ Stamens tetradynamous, distinct. 



3. Cruciferous plants herbs ; flowers regular, of four sepals and 



four petals, arranged crosswise. 



ft Placentas axile (\. e. seeds attached to axis of carpels). 

 J Flowers regular. 



Sepals overlapping at the edge (imbricate) . 

 || Ovary one-celled ; stamens distinct. 



4. Caryophyllaceous plants herbs ; leaves opposite, undivided, 



