ACACIA SEEDLINGS. 405 



Seeds glossy black, oblong, 4 mm. long, 2 mm. broad, 1 

 mm. thick. 



Hypocotyl erect, terete, white or pale below soil, pale 

 green to reddish above, up to 1*8 cm. long, 1*2 to 2 mm. 

 thick at base, *5 to *8 mm. thick at apex, glabrous. 



Cotyledons sessile, slightly auricled or sagittate, oblong, 

 apex rounded, 6 mm. long, 2 mm. broad, outer or underside 

 pale green, with usually one or two raised lines, inner or 

 upperside green, glabrous, soon becoming horizontal and 

 re volute, and sometimes remaining until the advent of the 

 fifth leaf. 



Stem terete, green, almost glabrous but with a few 

 scattered hairs. First internode *5 mm.; second 3 to 5 mm.; 

 third 3 mm. to 2*4 cm.; fourth 4 mm. to 1*6 cm.; fifth 4 mm. 

 to 1*2 cm.; sixth 3 mm. to 1*3 cm.; seventh 6 mm. to 1*5 

 €m.; eighth 7 mm. to 2*3 cm. 



Leaves — No. 1. Abruptly pinnate, petiole 4 to 8 mm. long, 

 green, glabrous; leaflets three pairs, rarely four, oblong, 

 acuminate, 5 to 7 mm. long, 2*5 to 3 mm. broad, venation 

 indistinct, upperside green, underside paler; rachis 5 to 8 

 mm. long, green, glabrous, excurrent. 



No. 2. Abruptly bipinnate, petiole up to 2 cm. long, 

 slender, green, glabrous, excurrent ; leaflets three to four 

 pairs; rachis up to 1 cm. long, excurrent. 



No. 3. Abruptly bipinnate, petiole up to 2*5 cm. long, 

 slender, excurrent; leaflets up to six pairs; rachis up to 

 2 cm. long. 



No. 4. Abruptly bipinnate, petiole up to 3*2 cm. long, 

 slightly dilated vertically, with a few scattered hairs; leaf- 

 lets up to eight pairs, up to 8 mm. long, the inner ones of 

 the basal pair usually much smaller in this and most of the 

 leaves, (Nos. 2 to 7); rachis sometimes with a few scattered 

 hairs; stipules 1 mm. long, flat, tapering to a point, and 

 showing a central nerve under pocket lens. 



