FRUCTIFICATION, OR FLOWER AND FRUIT. 19 



masses of fructification, termed Sori, fig. 100, 

 1 03, but not invariably present. 

 s. Amentum, a Catkin, consists of a cylindrical 

 common Receptacle (63), beset with numerous 

 firmly inserted Scales, each scale accompanied 

 by one or more Stamens (58) or Pistils (59) ; 

 rarely both. The pistil-bearing Catkin only is 

 permanent after flowering, as it becomes the 

 Fruit. See fig. 85-91. 



4. Spatha, a Sheath, more or less remote from the 

 Flower, bursts longitudinally, and finally becomes, 

 for the most part, membranous. The elongated 

 common Receptacle, in some instance? contained 

 within the Spatha, is termed Spadiv, as in Arum 

 and Calla. 



5. Gluma, a Husk, or Glume, the chaffy Calyx pe- 

 culiar to Grasses. The Arista, or Awn, a spi- 

 ral hygrometrical bristle, is its occasional ap- 

 pendage, though more generally belonging to the 

 chaffy Corolla (56) of the same plants. 



<j. Perich&tium, a Scaly Sheath, investing the fruit- 

 bearing Flowers of some Mosses, fig. 106, 110; 

 and remaining at the base of their Fruit-stalk 

 (22). 



r. Volva, a Wrapper, the membranous covering 

 of the tender fructification in some of the Fungus 

 tribe, as the Gills of Mushrooms, which are 

 finally exposed, by the Volva forming a ring 

 round the Stalk (25). The same term is used, 

 C 2 



