ACACIA SEEDLINGS. 



121 



Bipinnate — ( Botryocephalse). 



Acacia discolor Willd. Seeds from Woodburn near Milton, 

 Medlow and Mosman, New South Wales. (Plate V, 

 Numbers 7 to 9. 



Seeds black, oval to oblong-oval, 4 to 5*5 mm. long, 2*5 

 to 3*5 mm. broad, about 1*5 mm. thick. 



Hypocotijl terete, reddish to red, 1*2 to 4 cm. long, up 

 to 2*5 mm. thick at base, 1 mm. at apex, glabrous except 

 sometimes with a few roots. 



Cotyledons sessile, sagittate, obovate-oval, up to 6 mm. 

 long, 4 mm. broad, upper and underside red, the latter with 

 a raised line along centre, becoming revolute in a few 

 days. 



Stem at first angular, becoming terete, brownish-red to 

 brownish-green, glabrous in the Milton specimens, with a 

 slight tomentum in the Medlow plants. First internode 

 '5 mm.; second 3 mm. to 2*7 cm.; third 3 to 6 mm.; fourth 

 to seventh 4 mm. to 1*7 cm. 



Leaves — No. 1. Abruptly pinnate, petiole 2 to 6 mm., 

 glabrous; leaflets four to six pairs, oblong-acuminate, often 

 mucronate, 4 to 8 mm. long, up to 2 mm. broad, upperside 

 reddish-green, underside red; rachis 5 mm. to 2*1 cm., 

 reddish, with terminal seta. 



No. 2. Abruptly bipinnate, petiole 5 to 9 mm., pilose to 

 hirsute, a gland on upper margin, terminal seta present; 

 leaflets four to nine pairs, oblong-acuminate, the apical 

 pair often obovate, 3 to 5 mm. long, 1 to 3 mm. broad, 

 mucronate, upperside reddish-green, underside red; rachis 

 8 mm. to 1*8 cm. 



Nos. 3 and 4. Abruptly bipinnate, petiole 7 mm. to 1 

 cm., with a gland, hirsute; leaflets four to eight pairs on 

 No. 3, eight to twelve pairs on No. 4; rachis 1*1 to 2*5 cm. 

 No. 4 may have two pairs of pinnae. 



