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Phyttodia numerous, ovate or almost orbicular, very obliquely truncate or narrowed at the base 
and often petiolate, usually about J inch, but varying from to nearly 1 inch long, 
coriaceous, undulate, 1-nerved and penniveined, the margins thickened, terminating in a 
short or fine point. 
Peduncles slender, often exceeding the phyllodia, bearing each a globular head of 20 to 30 or more 
flowers, mostly 5-merous. 
Calyx very short, toothed. 
Petals smooth, united above the middle. 
Pod shortly stipitate, 7 to 9 lines broad, very flat, with nerve-like margins. 
Seeds flat, ovate, oblique ; funicle with the last fold thickened and not half so long as the seed, 
and short folds below it. (B.Wl. ii, 355.) 
Affinities. 
1. With A. brachybotrya Benth. 
Specimens of Bentham's var. glaucophylla and this species have been labelled 
by careful botanists A. undulifolia vars. pubescens or dasyphylla. 
The most obvious difference between the species lies in the phyllodes 
(compare Plates 200 and 204). Those of A. undulifolia are almost invariably 
oblique, with a twisted point, and usually a broadish base. Those of A. brachybotrya 
are usually more oval. 
The inflorescence is usually racemose in A. brachybotrya and peduncles 
1-headed in A. undulifolia. 
Bentham mentions that the peduncles are rather short, solitary, or more 
frequently 2-5, in A. brachybotrya. In A. undulifolia the peduncles are always 
onger than those of the phyllodes. 
The pods are very different. 
2. With A. vestita. 
I will discuss the affinities of this species when I figure A. vestita. 
3. With A. podalyricefolia. 
The same remarks apply to this species. 
4. With A. obliqua. 
Some forms of this species may be superficially confused with A. undulifolia 
var. humilis. The relations of the two species will be explained when A. obliqua is 
reached. 
Botanical Name. Acacia, already explained (see Part XV, p. 104) ; 
undulifolia (the original spelling is Mndul&folia), from two Latin words, undulatus, 
wavy, and/0/iwwi a leaf, in reference to the wavy appearance of the phyllodes. 
Synonyms. These are given by Bentham as follows : 
(a) A. uncinata Lodd. ; Lindl. Hot. Reg t. 1332. 
(b) A. piligera A. Cunn., in Sot. Mag., under t. 3394. 
(c) A. setigera A. Cunn., Hook., Ic. PI. t. 166. 
