94. THE INFLORESCENCE. 
329. The Carxrn (amentum) consists of a cylindrical r 
: eeptacle, with closely imbricated scales or bractee covel 
3 unisexual flowers, as in the Walnut (Juglans regia), the 
(Pinus), the Birch (Betula), and the rest of the Amentace 
(Juss). The fir-top is a catkin. The catkin of the Ho 
(Humulus lupulus) contains the bitter principle which 
ders this plant so valuable in brewing. See Fig. 21, the 
kin of the Hazel (Corylus Avellana). 
330. The Carrrutum (glomus), head, or tuft, has 
flowers sessile, or with very short peduncles, and ranged 
a globular form, as in Common Thrift or Sea Gi we 
(Statice Armeria), Trefoil (Trifolium), Scabious (Seabiosa, 
This is an umbel with nearly sessile flowers, and the 
has been applied also to compound flowers, as the T 
__ in which the receptacle or top of the peduncle swells out. 
toa spherical shaped body, ealled phoranthus, which suy 
_ the flowers. The capitulum is found in the 
