TO BOTANY. 17 



6. A GLUMOSE aggregate flower has a filiform 

 receptacle, the base of which is furnished with a com- 

 mon glume, husk, as in Bromus, Festuca, Avena, 

 Arundo, Briza, Poa, Aira, Uniola, Cynosurus, \le- 

 lica, Elymus, Lolium, Triticum, Secale, Hordeum, 

 Scirpus, Cyperus and Carex. 



7. A SPADICEOUS aggregate flower is, when 

 there is a receptacle common to many florets placed 

 within a spatha or sheath; such a receptacle is call- 

 ed a spadh\ and is either branched, as in Palms, or 

 simple. In this last case the florets may be disposed 

 either all round it, as in Calla, 'Dracontium and Po- 

 thos ; on the lower part of it, as in Arum ; or on 

 <mc side of it, as in Zostera. 



CHAP. XX. 



OF LUXURIANT FLOWERS COMMONLY CALLED 

 DOUBLE. 



A FLOWER is said to be luxuriant, when some of 

 the parts of the fructification are augmented in 

 number, and others thereby excluded. The luxu- 

 riancy is commonly owing to the luxuriancy of its 

 nourishment; the part multiplied is usually the co- 

 rolla, but sometimes the calyx also ; and by this 

 increase of the covers, the essential parts of fructi- 

 fication are destroyed. Luxuriant flowers are divi- 

 sible into, 1. Multiplicate, multiplied. 2. Pleni, full. 

 And, 3. Proliferous, producing young; to which 

 may be added 4. Mutilate, manned ; such as are de- 

 ficient in some part, which stand opposed to the lux- 

 uriant ones: all these shall be explained in their order, 

 1. Flowers are said to be MI-LTIPI ICATE, when 

 by the increase of the corolla only a part of the sta- 

 a are excluded ; and this distinguishes them from 

 plcni, full flowers, in which the multiplied- 

 c S 



