INFLORESCENCE. 73 



4. A Corymhus consists of a common stalk from 



which partial flower-stalks proceed, which 

 partial stalks are gradually longer as they 

 are lower in the group, so that the flowers 

 stand nearly on a level with each other, as 

 in Yarrow, (Achillea) fig. 1, pi. 34; and 

 most plants of class Tetradynamia. 



5. A Fascicle is a close bundle of flowers upon 



erect, variously inserted, and subdivided 

 peduncles, all forming a flat or even sur- 

 face, as in Sweet- William, (Dianthus bar- 

 batus) and the Deptford Pink, (Dianthus 

 Armaria) fig. 2. 



G. A Head or Tuft, when the flowers are collected 

 into a globular form at the extremity or 

 summit of the stalk, as in Thrift, fig. 3. 

 Adoxa, fig. 4, and Trefoil. 



7. An Umbel, in which a number of flower stalks 

 proceed like rays from a common centre, 

 and commonly form a convex surface. In 

 a simple umbel each ray or flower-stalk is 

 simple and single flowered, as in Flower- 

 ing-rush, fig. 5, and Ivy. In a compound 

 umbel each ray or stalk bears an umbellule 

 or partial umbel, as the Fool's-parsley, fig. 

 1, pi, 35. Hemlock and Carrot. 



