ACACIA SEEDLINGS. 147 



No. 6 and upwards. Phyllodes, the first few being linear 

 and almost straight, the later ones becoming falcate and 

 remarkably decurrent on the stem, all being striate with 

 several nerves, and tapering into a pungent point. In a 

 seedling 8 to 10 cm. high, the phyllodes reach about 1*8 cm. 

 long, by 1 to 1*5 mm. broad. 



Uninerves — Brevifolise. 



Acacia hispidula, Willd. Seeds from Cheltenham, near 

 Sydney. Growing on Hawkesbury Sandstone formation. 

 (Plate I, Numbers 2 to 3a.) 

 Seeds dull black, oval-oblong, 7 mm. long, 4 mm. broad, 



3 mm. thick. 



Hypocotyl erect, terete, sometimes brownish just above 

 soil, pale green in upper portion, up to 3 cm. long, 1*7 to 

 2*3 mm. thick at base, *8 to 1 mm. at apex, swelling sud- 

 denly into the root, which in the case of No. 2, Plate I, 

 reached a length of 10 cm. in a few days, glabrous. 



Cotyledons sessile, sagittate, ovate, soon becoming 

 revolute, and cylindrical, 8 mm. long, 4 to 4*5 mm. broad, 

 outer or underside at first pale yellow, becoming pale green, 

 with a ridge about 1 mm. wide along central portion; upper- 

 side at first pale green, becoming dark green, glabrous. 



Stem terete, hispid; becoming scabrous in upper portion. 

 First internode *5 to 1 mm.; second 5 mm. to 2*5 cm.; third 

 5 mm. to 1*2 cm.; fourth 2 to 5 mm.; fifth 2 to 9 mm.; sixth 

 2 to 7 mm., varying in different individuals. 



Leaves — No. 1. Abruptly pinnate, petiole 6 mm. to l*4cm. 

 long, green, pilose ; leaflets four to five pairs, oblong, 

 acuminate, often mucronate, midrib and secondary vein 

 usually distinct, 6 mm. to 1*1 cm. long, 2*5 to 4 mm. broad, 

 upperside green, underside paler, glabrous; rachis 1*7 to 

 2*6 cm. long, green, sometimes glabrous or with a very few 

 scattered hairs, excurrent. 



