106 R. H. CAMBAGE. 



Sequence in the Development of Leaves. 

 In Part VI, (p. 147), it was mentioned that 95 species 

 had been found to commence with one simply pinnate leaf, 

 while 12 had an opposite pair. The following four may be 

 added to the former list, which brings the total to 99: — 

 A. Catechu Willd., (Hawaii, E. O. Andrews, cultivated), 

 A. Havilandi Maiden, A. Jonesii F.v*M. and Maiden, A. 

 Westoni Maiden. 



To the twelve species commonly having an opposite 

 pair of simply pinnate leaves the following two may be 

 added: — A. arabica Willd., (Hawaii, E. C. Andrews, culti- 

 vated), A. Koa A. Gray, (seeds from Hawaii, E.O.Andrews). 



Although A. Westoni usually has only one simply pinnate 

 leaf it occasionally has an opposite pair. 



A. linifolia may have an opposite pair (J. J. Fletcher). 

 M umber of Pinnae on One Leaf. 



In addition to those phyllodineous Acacias already 

 recorded as having more than one pair of pinnae on one leaf 

 (Part VI, p. 147), the following may be added : — A. difformis, 

 A. longifolia and A. Westoni may have two, and A. 

 melanoxylon nine pairs. 



Closing Up of Fhyllodes at Night. 



The closing up at night of leaflets on plants of the Family 

 Leguminosae, including the genus Acacia, is well known. 

 Recently, however, it was noticed that the phyllodes of 

 A. complanata respond to changes from light to darkness* 

 On a small plant, with the stem bent almost into a hori- 

 zontal position, the lower margins of two almost opposite 

 phyllodes were 7 cm. apart during sunlight, while at night 

 they closed up to within 3 cm. of each other, the movement 

 of each amounting to 2 cm., or just over f of an inch. 

 Flowering Seedlings. 



Several examples have been quoted of Acacia seedlings 

 having flowered in 4, 5 or 6-inch pots, (Part VI, p. 151), and 



