286 SYSTEMATIC BOTANY. 



many in each cell. Fruit splitting into two dry cocci, or inde- 

 hiscent, and then dry and succulent, 2-celled, 2- or many-seeded ; 

 seeds, if definite, erect or ascending, or numerous on axile pla- 

 centas ; embryo in horny perisperm. 



Fig. 391. 



Rubia : a, flower, nat. size, showing obsolete calyx, gamopetalous 

 corolla, &c. ; b, section of the flower. 



ILLUSTRATIVE GENERA. 



By Bentham and Hooker the immense Order Rubiaceae is divided into 

 twenty-five tribes, which latter are grouped into series and subseries as 

 follows: 



SERIES T. Ovules indefinite. 



Subseries 1. Fruit dry, capsular, or indehiscent. 



Tribes Naucleae, Cinchoneae, Henriquezieae, Condamineae, Ron- 

 dele tiese, Hedyotideae. 

 Subseries 2. Fruit fleshy or coriaceous, indehiscent. 



Tribes Mussaendeae, Hamelieae, Catesbaeeae, Gardenieae. 

 SERIES II. Ovules geminate in each cell. 



Tribes Cruckshanksieae, Retiniphylleae. 

 SERIES III. Ovules solitary in each cell. 

 Subseries 1. Radicle superior. 



Tribes Guettardeae, Kuoxieae, Chiococceae, Alberteae, Vanguerieae. 

 Subseries 2. Radicle inferior. 



Tribes Ixoreae, Morindeae, Coussareae, Psychotrieae, Pcederieae, 



Anthospermeae. Spermacoceae, Galieae. 



The distinctions between the Tribes are founded on the aestivation of 

 the corolla, the winged or not winged seeds, the nature of the inflorescence, 

 and of the fruit, &c. 



Affinities, &c. The Rubiaceae are often divided into two Orders, Cinch o- 

 naceae and Galiaceae, or Stellatae, the latter including all the genera with 

 large foliaceous stipules, or, as they are termed, whorled leaves: the distinc- 

 tion does not appear to be sufficient. The presence of interpetiolar stipules, 

 either small or imitating leaves, is the principal character separating this 

 Order from Caprifoliaceae, where, however, Lindley observes that they 

 sometimes occur as monstrous growths. This Order also runs very clo&e 



