THE APPENDAGES. 



23 



3. The Cluster or Raceme (Fig. 97, 98.) consists of numerous 

 flowers, each on a stalk of its own, arranged along a common 

 stalk. The principal difference between the raceme and the spike 

 is, that in the latter the flowers are nearly or entirely sessile and 

 close, while in the former they are more or less stalked and some- 

 what distant from each other. The cluster may be one-rowed, 

 simple, compound, erect, pendulous, &c. 



4. The Corymb (Fig. 99.) is an erect cluster, the partial stalks 

 of which are gradually longer as they stand lower on the common 

 stalk, so that the flowers are nearly level. 



5. The Bundle or Fasciculus (Fig. 100.) consists of several 

 flower-stalks of equal height, arising at the end of the stem, vari- 

 ously inserted and subdivided, and forming a close bundle. 



6. The Head (Fig. 101.) bears the flowers sessile in a globular 

 or ovate form. It is merely a condensed spike or raceme. 



7. The Umbel consists of a number of flower-stalks of nearly 

 equal length, rising from one common centre or point, their sum- 

 mits forming a level or convex surface. When the stalks are 

 simple and single- flowered, it is called a Simple Umbel. (Fig. 102.) 

 When the summit of each stalk sends out a number of smaller 

 stalks, similarly arranged, it is called a Compound Umbel (Fig. 

 89.) ; in which case the first stalks are collectively called the 

 General umbel, and the smaller sets the Partial umbels. 



8. The Cyme (Fig. 103 ) is that kind of inflorescence which 

 has the general appearance of an umbel, but in which the principal 

 stalks only spring from a common centre, while the others are 

 variously and alternately subdivided. 



9. The Panicle (Fig. 104.) bears the flowers in a kind of loose 

 subdivided cluster. Or it may be defined a raceme, of which the 

 partial stalks are subdivided. It presents the following varieties : 



Loose or Lax, when the stalks are distant. 



Close, when they are placed near each other. 



Crowded, when very close. 



Spreading, when the branches spread out on all sides. 



10. The T/iyrsus, or Bunch, is a close panicle, having an oval 

 form. 



H. The Catkin (Fig. 105.) is a long simple stalk, thickly 

 covered with scales, under which are the flo%vers, or their essential 

 parts. 



c 



