INDEX. 235 



PAGE 



It may be round, square, or polygonal, but is always roundly 



minded 96 



Its structural power is Spiral 96 



It is essentially branched ; having subordinate leaf-stalks and 



flower-stalks, if not larger branches 98 



It developes the buds, leaves, and flowers of the plant. 



This power is not yet properly defined, or explained ; and referred 



to only incidentally throughout the eighth chapter 94-97 



II. THE LEAF-STALK (CYMBA) sustains, and expands itself into, 

 the Leaf 94, 95 



It is essentially furrowed above, and convex below 95 



It is to be called in Latin, the Cymba ; in English, the Leaf -Stalk 95 



III. THE FLOWEK-STALK (PETIOLUS) : 



It is essentially round 92 



It is usually separated distinctly at its termination from the 



flower 92, 93 



It is to be called in Latin, Petiolus ; in English, Flower-stalk 



These three are the essential parts of a stem. But besides these, it 

 has, when largely developed, a permanent form : namely, 



IV. THE TRUNK. A non-advancing mass of collected stem, ar- 

 rested at a given height from the ground 98 



The stems of annual plants are either leafy, as of a thistle, 

 or bare, sustaining the flower or flower-cluster at a certain 

 height above the ground. Receiving therefore these follow- 

 ing names: 



V. THE VIRGA. The leafy stem of an annual plant, not a 



grass, yet growing upright 104 



VI. THE VIRGULA. The leafless flower-stem of an annual plant, 



not a grass, as of a primrose or dandelion 104 



