FRUCTIFICATION, OR FLOWER AND FRUIT. 27 



not perceptible till the Seed is moistened, as 

 in Salvia verbenaca. 



8. Arillus, the Tunic, a complete or partial cover- 

 ing-, attached to the base only, more or less 

 loose, or inflated, as in Urania, fig. 155, Euony- 

 mus, and the Mace of the Nutmeg. In Oralis 

 this part is elastic; yet perhaps a more genuine 

 Arillus than in the true Rutacetf, or the Eu- 

 phorbia:. See Jussieu's 81st and 96th orders. 



9. Pappus, the Seed-down, a feathery, hairy, 

 bristly, or membranous tuft, or crown, at the 

 summit of a Seed, rarely at its base, most im- 

 portant in the Compound Flowers. 



10. Cauda, a Tail, a terminal, often feathery or 

 hairy, appendage, formed of the permanent 

 Style (59). 



n. Rostrum, a Beak, an elongation of a Seed- 

 vessel, as in the Geranium tribe, or of a Seed, 

 as in Scandiv, fig. 210. 

 12. Ala, a Wing, a dilated membranous or coria- 

 ceous expansion, terminating or surrounding a 

 Seed, or Seed-vessel, fig. 221, c. 

 63. Receptaculum, the Receptacle, the common base, 

 or point of connexion, where all the parts of a 

 Flower meet : as also the place of insertion of the 

 Seeds (62) more particularly. The Receptacle of 

 a Flower is the disk, or space between the Sta- 

 mens (58) and Pistil (59) ; especially if the Ger- 

 men be inferior. In Compound Flowers (68) the 



