REGIONS AND AREAS OF DISTRIBUTION. 565 
that many additions might be made from a careful scrutiny of the 
herbarium of the Jardin des Plantes at Paris, and that much re- 
mains yet to be discovered in the interior of Madagascar. 
Table 16. Composite of the Mascarene Islands. 
Genera. ec Total. Connexions, 
Vémonim oa nens 6 7j African. 
Centauropsis .. 2 2 Asiatic Adenoon, Australian Pleurocarpea. 
Adenostemma Roe 1 Tropical weed. 
Ageratum ..... a 1 Tropical weed, 
Rochonia.. 2 2 African and American homochromous 
Glycideras c 1 1 Asteroidee. : 
Hentioig E E eee 1 1 | South-African Felicia? or Australian 
C meds : ral} 
onyza 5 5 ical regions generally. 
Puiudia. cere cee 16 16 pa 
Synchodendron...... 1 1 South-African. 
Biumesa croeer 1 2 Tropical Africa and Asia. 
Pluches .. me 1 2 Tropical Africa and Asia, 
Spheranthus ......... 1 T Tropical Africa and Asia. 
c PEE 1 1 South America, Australia, New Caledonia. 
onarrhenes ....... 3 8 5 
Cylindrocline......... ï I } None MiB E 
Demidium: oo. 1 1 Little known. 
Gnaphalium ......... 4 5 African. 
Helichrysum ......... 22 22 African and Australian. ; 
Stenocline ............ 16 16 South-American and somewhat African. 
Syncephalum 1 1 African? 
ltebe- inei 1 1 South-African. 
¡Athos 2 2 African and Australian. 
Prhis..— 1 1 African. 
Sphacophyllum...... 1 1 African 
Gea Salsas 1 H African. : 
ABDIS ire co 2 2 African and South-American. 
Bpallage asa 2 2 South-American (and African ?). 
Mind DELL 1 1 African and BSouth-American ? 
Centipeda aoe 1 Tropical weed. 
Eriothrix...... 1 1 None near. 
Faujasia ... 3 3 African Senecios. _ 
Gynura 2 3 African and Asiatic. 
Emilia... 3 4 Asiatic, 1 tropical weed. : 
Senecio 30 30 Cosmopolitan and somewhat specially | 
can. ; 
Crepis ......... cs 1(? 2 Tropical weed. RS 
cias TEENS "s : 1 Ao (1 species), Europso-Asiatic, Ame- 
rican, &c. 
Lactuoa o.s. rises 1 Asiatic. E 
Microrhynchus ...... 1 2 Asiatic and African. 
39 genera, of which! ¿59 151 1 African, 2 Asiatic, 3 Australian, 4 South- 
15 endemic, American, 
The twelve species in the above list which are not endemie may 
all be regarded as common tropical Old-World weeds, with the 
exception, perhaps, of the Pluchea and the Gynura (Cremocepha- 
lus), which are African. The Composite flora is therefore almost 
as strictly endemic as that of the Sandwich Islands. It is also 
much diversified, with evidences of great antiquity. The genera 
Synchodendron, Monarrhenes cum Cylindrocline, Syncephalum, and 
especially Eriothrixw are almost as isolated as any South-African 
