128 MR. S. T. DUNN: А REVISION 
that the only Robiniew inhabiting the same regions of the world as Millettia 
(i.e. Microcharis and Sesbania) are easily and naturally distinguished by 
obvious generic characters, while the American and therefore geographically 
extra-Millettian genera Robinia and Gliricidia show close connection with 
that genus. Robinia has, however, a tendency to be thorny or bristly, 
which is never observed in Millettia, while Gliricidia differs from all known 
Millettias in its strictly racemose and axillary inflorescence *. 
Millettia, then, is placed among the Tephrosiew. There is only one other 
large genus in that sub-tribe containing, like Millettia, trees and shrubs, 
i.e. Tephrosia, and that is readily distinguishable by the regular develop- 
ment of the long row of ovules in its ovary into a continuous even series of 
small seeds enelosed in the narrow, linear, thin-valved pod. There are, 
however, 8 smaller genera which closely resemble Лена in habit and 
floral structure. They should be placed near it in the sub-tribe. All but 
one have been described since the appearance of the Leguminose in the 
‘Genera Plantarum.’ Their interpolation with the genera there described 
is suggested as below :— 
Number in | Suggested 
‘Genera | inter- Name of genus and place.of publication. 
| Plantarum. polation. 
| 109 | y | Mundulea, DC. Mém. 14у. 206. 
| 108 | .. | Sarcodum, Lour. Fl. Cochinch. 461. 
| e | 103-1 Schefllerodendron, Harms in Eng. Jahrb. xxx. (1901) 87. 
| e. | 103-2 | Craibia, Harms and Dunn in Journ. Dot. xlix. (1911) 107. 
| 104 | .. | Millettia, Wight et Arn. Prodr. 263. 
104-1 Platysepalum, Welw. ev Baker in Oliver, Fl. Trop. Afr. ii. 131. 
104-2 | Dewevrea, M. Micheli in Bull. Soc. Bot. Belge, xxxvii. (1898) 1. 47. 
| 2. 104-8 Fordia, Hemsl. in Journ. Linn. Soc., Bot. xxiii. (1886) 160, 
| 2. 104-4 Adinobotrys, Dunn in Kew Bull. 1911, 194. 
| D. 104-5 | Padbruggea, Mq. ; Dunn, l.c. 197. 
| 105 e | Wistaria, Nutt. Gen. N. Am. PL ii, 115. 
KEY TO ABOVE GENERA T. 
1. Flowers in terminal racemes or axillary fascicles  .............. 2 
Flowers in panicles or in axillary or lateral racemes ......... TED 3 
2. Erect shrubs....... 0... cece eee tee hh Mundulea. 
Climbing shrubs with terminal racemes ........................ Wistaria §. 
* See account of inflorescence below. 
T Sarcodum, an imperfectly known genus from Indo-China, is omitted. 
t Fordia pauciflora, Dunn (Millettia cauliflora, Prain), has solitary or fascicled flowers. 
$ Confined to IV. frutescens, W. brachybotrys, and W. chinensis. 
