ACACIA SEEDLINGS. 155 



Plurinerves — (Nervosse). 



Acacia melanoxylon R.Br. "Tasmanian Black Wood." 

 SeeJs from Jenolan Caves, Robertson, N. S. Wales, 

 (F. A. Hynes), Port Arthur, Tasmania, (0. Hedley), 

 Maleny, Queensland, (Walter Oambage). (Plate VIII, 

 Numbers 1 to 3). 



Seeds oval to oblong-oval, 5 to 6 mm. long, 3 mm. broad, 

 1 to 1*5 mm. thick. 



Hypocotyl terete, pale to brownish-red, 1'5 to 2 cm. long, 

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

 except that in one Robertson seedling two roots appeared 

 just below the middle. 



Cotyledons sessile, sagittate, oblong to oblong-oval, 5 to 

 6 mm. long, 2 to 3 mm. broad, upperside green, underside 

 at first yellowish-green, becoming pale green and some- 

 times tipped with light red, with raised line along centre 

 and sometimes a second shorter one, glabrous. 



Stem at first slightly angular, becoming terete, slightly 

 striate with decurrent leaf stalks, pilose to somewhat 

 pubescent. First internode "5 mm.; second 1 to 5 mm.; 

 third and fourth 2 to 7 mm.; fifth to seventh 5 mm. to 

 1*4 cm.; eighth to tenth 5 mm. to 4 cm. 



Leaves — No. 1. Abruptly pinnate, petiole 3 to 5 mm., 

 glabrous; leaflets three to five pairs, oblong-acuminate, up 

 to 5 mm. long, 1*5 to 2 mm. broad, midrib and sometimes 

 secondary vein showing under pocket lens, upperside dark 

 green, underside paler, margins often red ; rachis 5 to 6 mm. 

 glabrous, excurrent. 



No. 2. Abruptly bipinnate, petiole 4 to 6 mm., glabrous; 

 leaflets three to five pairs, oblong-acuminate, up to about 

 4 to 5 mm. long, 1*5 mm. broad; rachis 4 to 7 mm., glabrous, 

 excurrent. 



Nos. 3 to 5. Abruptly bipinnate, petiole terete, 4 mm. 

 to 1*5 cm., pilose, No. 5 sometimes having a faint gland; 



