=A. penninervis= (feather-nerved). _fl._ yellow; heads about the size of a pea, racemose. April. _l._ phyllodia oblong, acuminated at both ends, straight, 2in. to 3in. long, 1/2in. broad, feather veined. _h._ 4ft. to 6ft. New Holland, 1824.
=A. platyptera= (broad-winged).* _fl._ yellow; heads solitary, on short peduncles. March. _l._ phyllodia short, bifarious, decurrent, obliquely truncate, mucronate; branches broadly winged. _h._ 3ft., Swan River, 1840. Greenhouse species.
=A. pubescens= (downy).* _fl._ yellow; heads small, globose pedicellate, disposed in racemes along the axillary peduncles. March. _l._ with three to ten pairs of pinnæ, each pinna bearing six to eighteen pairs of linear glabrous leaflets. _h._ 6ft. to 10ft. Branches terete, hairy. New Holland, 1790.
=A. pulchella= (pretty).* _fl._ yellow; heads solitary. April. _l._, pinnæ bearing five to seven pairs of oblong-ovate, obtuse leaflets. _h._ 2ft. to 3ft. New Holland, 1803. Greenhouse species. The variety _hispidissima_ has white flowers.
=A. Riceana= (Rice's).* _fl._ pale yellow, in long, solitary, axillary spikes. May. _l._ linear, in clusters, dark green, scattered or whorled. _h._ 20ft. Tasmania. Habit graceful, like a weeping willow. Very handsome and distinct. SYN. _A. setigera_. See Fig. 5.
=A. rotundifolia= (round-leaved). _fl._ yellow; heads globose, solitary, on long peduncles. March. _l._ phyllodia on short petioles, obliquely rounded, obtuse or retuse, mucronate. Branches angular, puberulous. _h._ 6ft. New Holland, 1842.
=A. saligna= (willow-like). _fl._ yellow; heads solitary, on short peduncles. March. _l._ phyllodia linear, attenuated at both ends, quite entire, almost nerveless. _h._ 6ft. to 10ft. New Holland, 1818. Greenhouse species.
=A. Senegal= (Senegal). Gum Senegal. _fl._ white, small, glabrous, distant; spikes axillary, solitary, slender. _l._ with five to eight pairs of pinnæ, each pinna bearing fifteen to eighteen pairs of oblong-linear, obtuse, glabrous leaflets; branches white; prickles sometimes wanting. _h._ 20ft. Arabia, 1823. Stove species.
=A. setigera= (bristly). Synonymous with _A. Riceana_.
=A. sophoræ= (sophora-podded). _fl._ yellow; spikes usually twin, axillary. May. _l._ phyllodia obovate, oblong or lanceolate, quite entire, many nerved; sometimes there are bipinnate leaves at the tops of the branches. _h._ 20ft. New Holland, 1805.