112 LEGUMINOSAE, [ Acacia. 
the base of the petiole. Raceme terminal, short and few-flowered, with 
occasionally a few flowers on short pedicels in the upper axils. Flowers 
yellow. Two of the anthers large oblong, 4 or 5 others like them but 
espnaph the 3 uppermost small and sterile, Pod linear, slightly curved, 
3—5‘ long, about 3” broad, at t flat with the edges ee but 
sabilae at length as thick as shia Benth. Fl. Hongk. p. 
f early introduction mon on all islands along roads and in oa 
Widely dispersed over all ay region 
The 3 following species are also occasio und as escapes from gardens: C, glauca 
C. age he vimined. Besides these there are in varerviebetsn C. alata, C. ‘auricutata, 
rida, C. mimosioides and other shrubby species. orn, apace trees: C. grandis, 
C. Parahjba, C. Fistula, C. Javanica, C. marginata, C. nodos 
SUBORDER III. MIMOSEAE. 
Sepals 5, rarely 4 or 8, free or united. Petals as many, equal, valvate 
ind 
dense globular heads or cylindrical spikes. 
23. ACACIA, WILLD. 
4 or 3, free or united. Petals as many, free or united. Sta- 
mens hte usually very numerous, free, or slightly connected at the 
ba d linear or oblong, flat or nearly cylindrical, opening in 2 valves 
or dadehincont — Trees or shrubs. Leaves twice pinnate or apparently 
simple, the petiole dilating into a phyllodium and taking the place of 
the true leaf. Flowers usually _ or yellow, in globular heads or 
cylindrical spikes, often polygamo 
A very large genus, one half Aust a an, a remainder dispersed 0 the warmer 
regions of the Globe. The Polynesian — of which there are 3 besid if = the Hawaiian 
(natives of the Samoa, Viti, N. Caledoni a and N. Hebrides Islands), belong to the Aus- 
tralia spe i with phyllodia instead of ivan 
Phyliodia instead of true leaves; pod flat; 
Sepals and ore united ; flower- heads in und racemes : 
i i bela 
and ¢ 2. r 
Sepa and Sats free; flower-heads in a terminal panicle ‘ A. ras auaiensis. 
Only true leaves present; pod cylindri 
1, A. Koa, Gray, Bot. U. S. E. Pile p. 480. — A tall tree, often at- 
taining a height of 50—60 ft., with far spreading branches. The adult 
tree bears only phyllodia, or vais true leaves springing from adventitious 
buds near the base of the trunk. The true leaves of the young plant 
have a margined or winged pubescent ama of 6—7’ in length, with 
5—7 pairs of pinnae and an oblong pitted gland halfway between the 
lowest pair and the base, each pinna dais 18—24 pairs of subsessile, 
oblong, mucronate leaficts, about 3“ long and over 1“ broad. Phyllodia 
