HOWARD AND HOWARD 21 
Smith, Secretary for Agriculture to the Government of the Transvaal, the 
seeds of single plants of the wild indigo of Natal were separately collected in 
that country for growth at Pusa. The samples were sown separately in lines 
next to next and the progeny was examined. The rows were remarkably 
uniform in themselves and there were no great differences to be observed 
between the various lines. Natal indigo proved to be erect in habit with little 
branched, green stems and a deep root system. The foliage was somewhat 
sparse. The reddish stems and leaves and the much branched habit of many 
of the types found in Java indigo were entirely absent. As regards suscep- 
tibility to Psylla and wilt, the Natal plant showed far less resistance than the 
Java cultures growing side by side. 
The kinds of indigo now grown in Java. q 
In 1916, a collection of the various kinds of indigo now growing in Java 
was obtained through the kind assistance’ of Dr. Koch of the Buitenzorg Bota- 
nical Gardens. These consisted of the following samples—Java-Natal indigo 
from the Koeto Sani Kstate, Java indigo from Soerabaya, Natal indigo from 
Soerabaya, Bengal indigo, wild indigo, Presi indigo, Sumatrana indigo and 
Indigofera suffruticosa. These were grown at Pusa in plots side by side and 
their behaviour under Bihar conditions, and after cutting back, was carefully 
studied. In most cases, the root system was also examined. The range in 
general habit, in the size of plant, in root development, in the proportion of 
leaf to stem, in vegetative vigour, in the power of repair after cutting back 
was very great. Some were perennials and others proved to be annuals. Wild 
indigo and Presi indigo showed low vegetative vigour and little power of 
repair after cutting back, behaving very much like Sumatrana indigo. Natal 
indigo grew like the species obtained from Natal and showed itself to be a 
deep-rooting perennial, unsuited, however, on account of its deep root develop- 
ment, to Bihar conditions. The sample which most nearly resembled the old 
Java plant which did so well in Bihar, was the Java-Natal from the Koeto Sani 
Estate. The examination of the plants raised from these samples showed 
that there are many types of indigo now growing in Java only one of which 
was in the least suited to Bihar conditions. © 
The composition of the Java crop in Bihar. 
In 1916, the botanical composition of the Java crop, as grown in Bihar, was 
examined in detail and compared with Java indigo as it existed in 1905 eleven 
years earlier. By a fortunate circumstance, we grew several plots of Java 
indigo at Pusa, in 1905 and 1906, and;thus became familiar with the plant which 
