26 THE STEM. 



stalk which bears the cluster, or cyme of berries, while each 

 berry has its own pedicel. 



The Flower is said to be 



Cauline, (Caulinus,) when it grows immediately out of the 

 main stem. Ex. Indian Shot, (Canna Indica.) 



Radical, (Radicalis,) when it proceeds immediately from 

 he root. Ex. Primrose, (Primula.) This is called a scape. 



Ramose, (Rameus,) when it proceeds from a branch. Ex. 

 Poplar, (Populus,) Cherry. 



Axillary, (Axillaris,) when it proceeds from between the 

 leaf and the stem. Ex. Passion Flower, (Passiflora.) 



Terminal, (Terminalis,) when it terminates a stem, or 

 branch, or proceeds from its extreme end. Ex. Crown Im- 

 perial, Tulip. 



PETIOLE, (Petiolus,) the Foot Stalk of the leaf. This is 

 the part usually small, which connects the leaf with the 

 tree, or when the leaves are radical, with the root. It is 

 commonly channeled on the upper side. 



The petiole is simple when it bears only a Fi g- 

 single leaf, Fig. 22, as in the sweet scented Ge- 

 ranium, Apple, Plum, and Rhubarb ; or com- 

 pound when it bears several leaves, as in the 

 Coriander, (Coriandrum sativum,) and Rose. 



There are also several other kinds of leaf 

 stalks, as, 



Winged Petiole, (Pctiolus alatus,) when the peti- 

 ole is expanded into a leafy border on each side, in 

 the form of wings. Ex. Orange tree. 



Sheathing, (Petiolus vaginans,} when the leaf 

 stalk embraces the stem. Ex. Wheat, Indian corn. 



Compressed Petiole, (Petiolus compressus,) when 

 the leaf stalk is compressed or flattened. Ex. As- 

 pen, (Populus Tremula.) To this form of the peti- 

 ole, the constant tremulous motion of the leaves of 

 this tree is attributed. 



What is the pedicel ? When is the flower stalk said to be cauline ' 

 When radical ? When is it ramose ? When is it said to be terminal ' 

 What is the petiole ? When is the petiole simple ? When is it com- 

 pound ? When winged ? When sheathing ? When compressed ? 



