ACACIA SEEDLINGS. 



153 



to 5 mm. from base; leaflets eight to ten pairs; rachis 2*5 

 to 3*6 cm. long, excurrent ; stipules as in Nos. 3 and 4. 



No. 6. Sometimes a phyllode, or abruptly bipinnate, with 

 petiole similar to No. 5; leaflets nine to ten pairs ; rachis 

 3*3 to 4 cm. long. 



No. 7. Either a phyllode, or abruptly bipinnate, petiole 

 vertically flattened to 7 mm. broad, the upper margin con- 

 vex, with a strong nerve or " midrib " extending along the 

 lower portion of the lamina, and usually a short, fine, rather 

 insignificant vein terminating in the upper marginal gland 

 about 5 to 7 mm. from base, the margins nerve-like, the 

 whole blade having a system of lateral anastomosing veins; 

 leaflets ten to eleven pairs; rachis about 4*5 cm. long. 



Nos. 8 and upwards. Phyllodes. 



Uninerves — Racemosae. 



Acacia mabell,e, Maiden, 1 "Black Wattle." Seeds from 

 Milton, N.S.W. Growing on a moderately siliceous soil. 

 • (Plate II, Numbers 5 to 7). 



Seeds black, oval, 4 to 5 mm. long, 3 mm. broad, 2 mm. 

 thick. 



Hypocotyl erect, terete, brownish-red, 1*8 to 3 cm. long, 

 1*5 to 2*4 mm. thick at base, "5 to 1 mm. thick at apex, 

 glabrous, often suddenly constricted just above soil. 



Cotyledons sessile, sagittate, oblong, apex rounded, 5 to 

 6*5 mm. long, 2*5 to 3 mm. broad, at first erect, but becom- 

 ing revolute and cylindrical in a few days, soon falling, 

 outer or underside brownish-red, often with ridge along 

 centre, upperside brownish-green, glabrous. 



Stem terete in lower portion, but becoming angular where 

 leaf-stalks are decurrent on the stem, brownish-green, 

 glabrous, or at first with a few scattered hairs which soon 



1 This Journal, Vol. xlix, (1915), p. 471. 



