BY A. A. HAMILTON. 161 



measurements were given (13; 1914, p.471); examples of this 

 species were also exhibited to illustrate leaf-twisting (13; 1 915, 

 p.418) The phyllodia of the A.falcata VVilld., A. pe'iminervis 

 Sieb., and A. pycnantha Benth., group are not easily separated 

 on the characters of shape, size, texture, and venation, each of 

 these species liaviug a fairly wide range of these characters 

 within itself. Specimens of A. binervata DC, in the National 

 Herbarium, collected at Stanwell Park, by Mr. J. H. Maiden, 

 have the following field-note by the collector — "Twigs from a 

 young tree, phyllodes very wide, and tripleveined." Mr. 

 Maiden's leaves are from 3 to above 4 inches long, and from 1 i 

 to 2 inches broad. A further series of this species collected in 

 the same locality by the writer (August, 1915), from an old tree, 

 are narrow and normally two-veined, ranging in size from 2 x ^ 

 to 6 X f inch, and in shape from straight to falcate, with a long, 

 acuminate apex. The description of Acacia-seedlings given by 

 Mr. R. H. Cambage(7; p. 97) discloses variation in shape, size, 

 number of leaflets, degree of pilosity, colour, venation, length 

 and dilation of petiole, and distance of internodes, in the seed- 

 ling-plants. In a concluding note, Mr. Cambage says (p.ll8) — 

 " In all the above descriptions the measurements quoted of the 

 various parts of the seedlings are either the average lengths or 

 the extremes so far met with, but in some cases the variation is 

 so considerable that it seems likely further investigation may 

 show that the greatest extremes of length have not yet been 

 recorded." 



The spiny leaves of Daviesia acicularis Sm., 1). idicina 8m., 

 and D genist'ifolia A.Cunn., are progressively merged, and those 

 of D. latifolvi R.Br., and D. corymbosa Sm., are, in many in- 

 stances, inseparable. Of the latter, Mr. Maiden (15; p.8), notes 

 the commingling of glaucous and non-glaucous forms; and a series 

 of leaves of this species illustrating variation was noted by the 

 writer (13; 1914, p.254). Local botanical collectors have, pro- 

 bably witiiout exception, noticed the variability in the foliage of 

 Dillmyniaerlcifolia Sm., and the similarity in the leaves of other 

 species within the genus. Mr. R. H. Cambage (5; 1900, p.GOO) 

 records some very marked features in the foliage of Cassia eremo- 



