16 FIELD AND WOODLAND PLANTS 



In our descriptions of wild flowers we do not always repeat those 

 features which are common to the species of their respective orders. 

 These features are, however, of the greatest importance ; and thus 

 it is essential that the reader makes liimself acquainted with them, 

 by referring to the synopsis of the orders, before noting those char- 

 acters which are given as being more directly concerned in the 

 determination of the species themselves. Thus, when we describe 

 the Pasque Flower (p. 297) we do not refer to those general characters 

 that apply to all the Banunculacece or Buttercup family, and which 

 may be seen at once by referring to p. 17, but give ail those details 

 that are necessary to enable one to distinguish between the Pasque 

 Flower and the other members of the same order. 



Dicotyledons 



(Leaves with netted veins. Parts of flower generally in fours 

 or fives or multiples of four or five) 



I. Flowers with both calyx and corolla. 



A. Corolla composed of free and separate petals. 



1. Stamens attached to base of flower, beneath the pistil — 



Orders 1-22. 



2. Stamens attached above or around the pistil — Orders 



23-36. 

 B. Corolla of united petals. 



1. Ovary inferior. 



a. Stamens on the corolla — Orders 37-41. 

 6. Stamens on the ovary — ^Orders 42-43. 



2. Ovary superior. 



a. Stamens free from the corolla — Order 44. 

 h. Stamens on the corolla — Orders 45-59. 

 II. Flowers with calyx or corolla or both absent. 



A. Flowers with corolla absent, and, generally, with stamens 



and pistil in the same flower. 



1. Ovary superior — Orders 60-64. 



2. Ovary inferior — Orders 65-67. 



B. Corolla and calyx usually absent. Stamens and pistil 



usually in separate flowers. 



1. Flowers not in catkins — Orders 68-7 T^ 



2, Flowers in catkins — Orders 72-76. 



