156 AN INTRODUCTION 



On the leaves ; as in Aloe, Agave, Yucca, Ilex, 

 Hippomane, Theophrasta, Carlina, Cynara, Onopor- 

 dum, Morina, Acanthus, Gundelia, Juniperus, Sal- 

 sola, Polygala, Ruscus, Borbonia, Statice, Ovieda 

 and Cliffortia. 



On the calyx ; as in Carduus, Cnicus, Centaurea, 

 Moluccella and Galeopsis; or, 



On the fruit; as in Trapa, Tribulus, Murex, Spi- 

 nachia, Agrimonia and Datura. 



CHAP. XIX. 

 OF GLANDULATION. 



GLANDULATION respects the secretory vessels; 

 ^vhich are either Glandules, Follicles, or Utricles. 



GLANDULES are either, 



Petiolar, when they are on the petioles ; as in Ri- 

 cinus, Jatropha, Passiflora, Cassia and Mimosa. 



Foliaceous, when they are produced from the 

 leaves : and these are either from the serratures, as 

 in Salix ; from the base, as in Aniygdalus, Cucur- 

 bita, Elaeocarpus, Irrjpatiens, Padus, andOpulus; 

 from the back, as in Urena, Tamarix, and Croton ; 

 or from the surface, as in Pinguicola and Drosera. 



Stipular, when they are produced from the sti- 

 pulae; as in Bauhinia and Armeniaca. 



Capillary, like hairs; as in Ribes, Antirrhinum 

 quadrifolium, Scrophulavia, Cerastium, and Silene; 

 or, 



Pores only ; as in Tamarix and Silene viscaria. 



FOLLICLES*, are vessels distended with air ; as in. 

 Utricularia, at the root of which there are roundish 

 vessels that are inflate, and have two horns; and Jn 



* Th e word signifies a little ball filled with wind. 



