516 DESCRIPTION OF A NBW SPECIES OF ACACIA. 



Owing to the unusually long leaflets it is not easy to assign a 

 relative position to this species in Bentham's Bipinnatse group as 

 defined in the Flora Australiensis. Of the three subdivisions of 

 this group, it belongs to the Botryocephalse series, and its having 

 one to three pairs of pinnae ranges it with A. elata, pruinosa, specta- 

 bilis, polybotrya, and discolor, while the narrowness of the leaflets 

 seems to connect it with A. decurrens. The gland a little removed 

 from the lowest pinnae indicates some afiinity to A. j^ruinosa. As 

 the slightly decuirent stem and a general facies seem to connect it 

 with A. decurrens, it has been provisionally placed between that 

 species and A. discolor, with which it can claim a remote kinship 

 in the fewness of the pinnae and leaflets. 



We think it is very appropriate to dedicate this interesting new 

 Acacia to Baron von Mueller, K.C.M.G., to whom botanists are 

 indebted for his classical '' Iconography of Australian Acacias." 



EXPLANATION OF PLATE XXV. 



Acacia Muelleriana. 



Fig. 1. — Twig of plant in bud. 

 Fig. 2. — Flower-head (enlarged). 

 Fig. 3.— Separate flower (enlarged). 

 Fig. 4.— Pod. 

 Fig. 5. — Seed (enlarged). 



Yig, 6.— Lateral view of petiole (enlarged), showing glands and wing on 

 upper edge. 



