ACACIA SEEDLINGS. 41} 
In addition to those mentioned in previous lists (Parts I 
to III), the following species have produced only one pinnate 
leaf, and this brings the number up to 83:— 
A. diffusa Lindl. A. cultriformis A. Ounn. 
A. sentis F.v.M. A. Howittii F.v.M. 
A. hakeoides A. Cunn. A. Chisholmi Bailey 
A. difformis R. T. Baker A. cardiophylla A. Ouun. 
A. decora Reichb. 
Three further species have now been found to have an 
opposite pair of pinnate leaves, which brings the number of 
such species up to ten. These are A. alata R. Br., (with 
an exception), A. continua Benth., and A. Oswaldi F.v.M. 
Number of Pinnz on One Leaf. 
In Part III, (p. 393), a list is given of phyllodineous 
Acacias which may have two or more pairs of pinne on the 
same leaf, and the following are now added to such list :— 
A. lanigera, A. oxycedrus, A. pendula, and A. pycnantha 
may have two pairs, A. trinervata four, and A. rubida 
six pairs. As each pair of pinnee is attached to the midrib, 
the appearance of the leaf is somewhat remarkable in cases 
such as where A. neriifolia has three pairs. Where the 
lamina is continued between the first and second pairs, 
the midrib comes to the upper margin of such lamina at 
the base of the first or basal pair. The width of the lamina 
varies between the first and second pairs, but between the 
second and third pairs the extension of the midrib is not 
dilated. (Fig. 1.) 
Absence of Bipinnate Leaves. 
Seeing that bipinnate leaves are such a feature of the 
genus, especially among the seedling foliage, it is of interest 
to observe that one species, A. alata, does not appear to 
produce such leaves at all. In about a dozen seedlings so ° 
far examined, there has been an opposite pair of simply- 
