AGGREGATE FLOWEKS. 309 



denomination, 7 kinds, his favourite number ; 

 these are, 



1. The Aggregate flower properly so called, 

 as just mentioned. 



2. The Compound flower previously described. 



3. The Amentaceous flower, or Catkin, of 

 which we have spoken p. 248. 



4. The Glumose, or Chaffy flower, peculiar 

 to the Grasses, see p. 250. 



5. The Sheathed flower, whose commpn re- 

 ceptacle springs from a Sheath, as in Arum. 



6. The Umbellate ; and 



?. The Cy mose flowers, concerning which 

 two last a few observations are necessary. 



Linnoeus and his friend Artedi thought 

 the great natural umbelliferous order could 

 not be divided into good and distinct ge- 

 nera by the seeds or parts of the flower, 

 without taking into consideration the general 

 and partial involucre! leaves, which they 

 therefore chose to consider as a part of the 

 fructification, and defined as a calyx remote 

 from the flower. The rays of the umbel, 

 of course, became the subdivisions of a 



