=A. cultriformis= (knife-formed).* _fl._ yellow, in crowded heads, disposed in either axillary or terminal racemes. April. _l._ phyllodia eight to ten lines long, four lines broad, cultriform, ending in an acute hooked point, which bears to one side. _h._ 4ft. New South Wales, 1820.
=A. cuneata= (wedge-shaped).* _fl._ yellow. April. Swan River, 1837. Greenhouse species.
=A. cyanophylla= (blue-leaved). _fl._ yellow; racemes axillary; heads globose. March. _l._ phyllodia lanceolate, often 1ft. long, glaucous green, almost blue; branches drooping. _h._ 18ft. Swan River, 1838. Arboreous.
=A. dealbata= (whitened).* The Silver Wattle. _fl._ yellow, in pedicellate heads, disposed in racemes along the axillary branches. July. _l._ from ten to twenty pairs of pinnæ, each of which bears thirty to thirty-five pairs of linear, much crowded pubescent leaflets. _h._ 10ft. to 20ft. Australia and Tasmania, 1820.
=A. diffusa= (spreading). _fl._ yellow, in globular heads, which are usually twin. May. _l._ phyllodia linear, one-nerved, ending in an oblique acumen; branches diffusely procumbent, angular. _h._ 2ft. Victoria and Tasmania, 1814.
=A. Drummondi= (Drummond's).* _fl._ pale lemon; spikes axillary, drooping, cylindrical, simple. April. _l._ with two pairs of pinnæ, each pinna bearing two to three pairs of linear obtuse leaflets. Plant unarmed, silky. _h._ 10ft. Swan River. Very handsome and one of the best grown, forming a somewhat dwarf shrub.
[Illustration: FIG. 4. ACACIA ARABICA (_a_) Flowering Branch, (_b_) Seed-pod.]
=A. Farnesiana= (Farnesian). _fl._ yellow, sweet-scented, disposed in axillary, usually twin, unequally pedunculate heads. July. _l._ with five to eight pairs of pinnæ, each pinna bearing from fifteen to twenty pairs of linear glabrous leaflets. _h._ 6ft. to 10ft. St. Domingo, 1656. Greenhouse species.
=A. glauca= (milky white).* _fl._ white; spikes globose, stalked, axillary, usually twin. July. _l._ with four to six pairs of pinnæ, each pinna bearing about twelve to fifteen pairs of linear, distant, acute leaflets, which are glaucous beneath. _h._ 5ft. to 10ft. South America, 1690.
=A. glaucescens= (greyish). _fl._ yellow; spikes twin, but solitary on the peduncles, axillary. June. _l._ phyllodia linear-lanceolate, attenuated at both ends, falcate, three-nerved. _h._ 6ft. to 8ft. Queensland, 1822. SYN. _A. homomalla_.