64 KEY TO NATURAL ORDERS 
racenia the leaf stalk is transformed into a hollow tube. Insectivorous 
plants growing in swamps, secreting a viscid substance which aids in 
the capture of insects. 
98. 99. 
98. Flower of Pitcher Plant. 99. Leaf of Droscera. 
OrpER VI—ROSALES—Orper or THE ROSE ALLIANCE 
(Page 292) 
Seed caskets (carpels) of variable number, free from each other or 
growing together. Petals and sepals usually 5. Stamens more numer- 
ous or of the same number. Flowers symmetrical or not. Receptacle con- 
cave. Leaves simple or compound. The stamens are usually inserted on 
the calyx a short distance from the ovary or at the top of the ovary. 
(aii 
“_— 
& 
101. 102. 103 104. 105. 106. 107. 108, 109. 
too. Schematic section of Rose hip. tor. Fruit of Gooseberry. 102. Fruit of 
Cherry. 103. Section of Apple. 104. Fruit of Strawberry. 105. Fruit of Black- 
berry. 106. Flower of Wild Vetch. 107. Flower of Clover. 108. Pod of Wild 
Vetch. 109. Flower of Sensitive Pea. 
OrvER VII—GERANIALES—OrprrR oF THE GERANIUMS 
(Page 364) 
Ovary superior to and free from the calyx. Stamens few, aS many as 
the sepals and opposite them or fewer when the corolla is irregular. 
The ovules are pendulous, the raphe or ridge toward the axis of the 
ovary. 
(PT BOSe we &F 
110. Iiile I12. 114. I15. 116, 117. 118. 119. 120. 
110, Fruit of Geranium. 111. The same aiter the bursting of the ovary. 112. Sec- 
tion of flower of Oxalis. 113. Flower of Flax. 114. Fruit of Flax. 11s. Cluster 
of fruit of Prickly Ash. 116. Cluster of flowers of Polygala. 117. Flower of Poly- 
gala, 118. Flower of Acoylpha. 119. Flower of Euphorbia. 110. Summit of Cali- 
triche. 
OrvEerR VIII—SAPINDALES—OrprEr oF THE MAPLES 
(Page 380) 
The characteristics which differentiate this order from the preced- 
ing is the fact that the ovules are pendulous with the ridge or raphe 
turned away from the axis of the ovary. 
I21. 122. 123. 124. 125. 126. 127. 128. 129. 
121. Spray of Empetrum. 122. Cluster of flowers of Sumac. 123. Berries of 
Holly, 124. Flowers of Euonymus. 125. Leaf of Staphylea. 126. Fruit (key) of 
Maple. 127. Flower of Jewel Weed. 128. Flowers of Buckthorn. 129. Grapes. 
