ACACIA SEEDLINGS. 115 



Nos. 21 to 30. Some of these may be linear phyllodes, or 

 abruptly bipinnate, petiole up to 12 cm. long, up to 5 mm. 

 broad, midrib distinct, lamina finely striate with parallel 

 nerves on each side of midrib. 



Nos. 31 to 40. Usually linear phyllodes, similar to the 

 dilated petiole of Nos. 21 to 30. 



Plurinerves — (Micron eurse). 



Acacia Oswaldi F.v.M. Seeds from Boggabri (Mrs. P. O. S. 

 Holt), Oobar (Archdeacon P. E. Haviland), Broken 

 Hill(E. O.Andrews), and Tottenham, New South Wales. 

 (Plate III, Numbers 6 to 8). 



Seeds very dark brown to black, oblong-oval to almost 

 orbicular, up to 8 mm. long, up to 6 mm. broad, 3 mm. thick, 

 areola 4 to 5 mm. long. The seeds germinate very quickly, 

 and in hot weather the seedling may appear in six days 

 after the seed has been planted. 



Hypocotyl terete, pale green to reddish-brown, 1'5 to 

 3*4 cm. long, 2 to 3 mm. thick at base, up to 2 mm. at apex, 

 expanding into flange at base. 



Cotyledons sessile, sagittate, obovate, 8 mm. to 1 cm. 

 long, 5 to 8 mm. broad, thick or somewhat fleshy, upper- 

 side at first pale green, becoming dark green, underside at 

 first yellowish-green, becoming pale green, sometimes 

 remaining until the phyllodes appear. One plant had three 

 cotyledons, one of normal size and two smaller. 



Stem terete, brownish-green to grey, glabrous. First 

 internode *5 to 1 mm.; second and third 2 to 4 mm.; fourth 

 to sixth 2 to 5 mm. 



Leaves — Nos. 1 and 2. Simply pinnate, forming an oppo- 

 site pair, petiole 7 mm. to 1*2 cm., often slightly dilated, 

 glabrous; leaflets one to four pairs, 7 mm. to 1*4 cm. long, 

 3 to 5 mm. broad, oblong-acuminate, the apical pair some- 

 times obovate, venation distinct, green on both sides ; 

 racliis 1 to 2 cm., with terminal seta. 



