AFRO-INDIAN REGIONS. 



259 



herbaceous plants and mostly epidendric, but including some ground 

 species. 



After leaving America, we entered the domain of the East Indian 

 plants, at the coral-islands; where were only a few subraaritime spe- 

 cies. The transition was more striking at Taheiti ; there being no 

 longer doubt as to the the disappearance of Cactacea3 and Bromelia- 

 cea3 ; Bromelias being replaced by PandauacecB ; Tillandsias by epiden- 

 dric Mdardhaceo} ; and Begonias and Dorstenias hy EJatostemas. In 

 fact, almost the only Brazilian connection that could be distin- 

 guished, was in the abundance of Urticeous shrubs. 



Negative characters. Unlike continental countries. Grouses and 

 Cyperaceoe compose but an in^^ignificant portion of the indigenous 

 vegetable growth ; being so thinly scattered, as hardly to attract 

 notice. Compositob are even more rare; and we met with but a single 

 species that is clearly indigenous. 



The following list of missing Tribes comprises only the principal 

 ones ; those whose unexpected absence seemed characteristic : 



Eanunculaceae, 



Rosacese, 



Polygonaceae, 



DilleniaceiB, 



(Rhizophoraceaj), 



Lauraceaj, 



Ma2;iioliaceae, 



Combretacese, 



Myristicaceae, 



Anoiiaceaj, 



Oiiagracea;, 



Aristolochiacese, 



Berberidacese, 



Paronychiacese, 



Amentacea3, 



Cruciferse, 



the Tribe Vicieae, 



Coniferfe, 



Papaveracese, 



the Tribe Cassiesc, 



Cycadaceae, 



Violacese, 



the Tribe Mimoseaj, 



Alisinaceae, 



Polygalaceae, 



Crassulaceas, 



(MusacefB), 



Pittosporaceae, 



Umbelliferae, 



Iridacese, 



Caryophyllacese, 



the Tribe Saxifrageae, 



Aniaryllidaceae, 



Linacese, 



Caprifoliaceae, 



Liliaceae, 



Boiubaceae, 



Valerianaceae, 



Dioscoreaceae, 



Ternstroeniiacefe, 



Sapotacea3, 



Sniihiceas, 



(Olacacese), 



(Ebenaceas), 



Coniiiielinaceas, 



Aurantiacese, 



Gentianaceae, 



Pahiiaceae, 



Hypericaceae, 



Bignoniaceae, 



Araccae, 



Meliacese, 



Solanaceae, 



(Typhaceae), 



Ampelidaceae, 



Labiatae, 



Pistiaceae, 



Oxalidacege, 



Verbenaceaj, 



J UMcaccte, 



Zygophyllacese, 



Plantaginaceae, 



the genus Carex, 



llutaceae, 



Nyctaginaceai, 



the Tribe Agrostideac- 



Oclinacese, 



Salsolacejc, 



Equisetaceae. 



On the 25th, the Vincennes sailed; and after a few hours, anchored 

 in the principal harbor of the Island of Aimeo. Being of inferior size, 



