FRUCTIFICATION, OR FLOWER AND FRUIT. 19 



the masses of fructification, termed Sort, fig. 100, 

 103, but not invariably present. 



3. 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. Spatka, a Sheath, more or less remote from the 

 Flower, bursts longitudinally, and finally be- 

 comes, for the most part, membranous. The 

 elongated common Receptacle, in some in- 

 stances contained within the Spatha, is termed 

 Spadid\ 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. 



6. Perichcetium, a Scaly Sheath, investing the 

 fruit-bearing Flowers of some Mosses, fig. 106, 

 110; and remaining at the base of their Fruit- 

 stalk (22). 



7. Volva, a Wrapper, the membranous covering 

 of the tender fructification in some of the Fun- 

 gus 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 



