xi] PAPPUS 93 



their Coverings e.g. JEsculus, Datura, Ricinus, Oaks and 

 Beeches, some Palms. 



Among the most remarkable and beautifully adapted 

 emergences may be mentioned the Pappus of the Com- 

 posite, the hair-like forms of which admirably serve their 

 purpose of wind distributors. True hairs are often formed 

 subserving the same purpose on seeds (Willows, Poplars, 

 Asclepiadeee, Gossypium, Eriodendron, &c.) or on fruits 

 {Stipa, Aristida, Eriophorum, &c.). 



