390 E. 0. ANDREWS. 
namely, Edwardsia, belongs to the old tribe Sophorez.. 
One explanation of the presence of Hdwardsia, Carmichelia. 
and its leafless allies, is that these forms entered New 
Zealand by a tropical land connection during a period when 
only the oldest tribes of the Papilionacez had been differ-. 
entiated, although it is doubtful whether they may not have 
descended from ocean waifs, much in the same way as 
HKdwardsia appears to have spread to Chili and Hawaii,* 
and as Afzelia has been carried to Fiji and other places. 
Olianthus and Swainsona are best explained as descendants. 
of waifs from Australia, otherwise it is difficult to account 
for the absence of Tephrosia, Indigofera, and allied forms, 
from New Zealand. Ina word, New Zealand appears to. 
have been isolated from warmer Australia and the tropics. 
before the Papilionacez had been highly differentiated. 
HEDYSAREA.—These are Papilionaceze whose pods sepa- 
rate into nondehiscent portions containing one seed apiece. 
The group might be distributed satisfactorily among the 
Galegeze, Phaseolez, and other tribes. Some of the large 
tropical genera, such as Aischynomene and Desmodium, as. 
also certain temperate-climate forms such as Coronilla, 
Hippocrepis, Hedysarum, Onobrychis, and Hbenus, appear 
to postdate the separation of tropical America, Africa, and 
Asia, from Australia. Patagonium, with ninety species in 
South America, is endemic there and apparently of recent. 
vigorous origin. 
The great number of small genera in the tropics suggests. 
the decadent nature of many genera in Galegee. 
VICIEH.—This is an important tribe which has tropical 
representatives, such as Vouacapoua, but whose main types. 
are vigorous and aggressive specialised forms such as Cicer, 
Vicia, and Lathyrus, which appear to have been cradled in 
* Guppy (35) 
