654 MIMOSACEAE 
4. ACACIELLA Britton & Rose. Shrubs or trees, or sometimes herbs. 
Leaves mostly 2-pinnate, sometimes reduced to phyllodia: leaflets usually nu- 
merous. Spikes capitate or cylindric. Calyx 
cupulate or resembling the cokola: Petals 
distinct or partially united. Filaments dis- 
tinct, or some of them slightly united at the 
base. Pod flat—About 50 species, mostly 
in ope or tropical regions. 
1. A. a (Nutt.) Britton & Rose. chus 
with ig foliage: leaf-pinnae mostly 1 
18: leaflets very Sara qu blades elliptic 
or narrowly elliptic, 4-5 mm. long: spike 
white, Bn or yellowish: pue less then 
1 ong; lobes deltoid, acute: corolla 
2—2.5 mm. Ion ng pod linear, 3- m ong, 
ns mm [A. filicioides (Fl SH. 
SS E m pen. Fla.; also various provinces, Tex. to Ariz., 
ans ., and Mo.—(Mez.) 
. VACHELLIA d & Arn. Shrubs or small trees. Leaves 2-pin- 
nate: leaflets numerous, small. Spikes globose. Calyx-lobes minute "a rela- 
] 
tively short. orolla about twice as long as the calyx, the lobes short. Fila- 
ments distinct. Pod is turgid pide species of wide ge iu distri- 
bution.—Spr.-sum. or all year S.—OPOPANAX. YELLOW-OPOPANAX. POPINACK. 
HINSACH. CASSIE. Pu A NM 
Leaflets d reu blades relatively large 4.5-6.5 mm. long, veiny: spikes over 1 
a in diamet pod blunt or merely abruptly Ec the suture prominently 
ridged. 1. V. Farnesiana. 
Leafets contiguous; blades relatively small, 1.5-3.5 m long, 
not veiny : spikes less mian e mm. in diameter : bod 1 beaked 
p 
Pod beaked, turgid. 
Flower- heads, 1—3 AE the peduncles nearly 2 cm. 
ong: nal mucro of leaf-rachis glabrous or nearly 
so: Soles: SUonoRdguetci) slender. . V. peninsularis. 
Bs p s tog ether, the peduncles mostly less 
Benin alm mucro of leaf-rachis pubes- 
E aries ‘proportionately stout. A V. densiflora. 
Pod ee not turgid. . V. insularis. 
1. V. Farnesiana (L.) Wight & Arn. Stout shrub or small tree, armed wi 
rather short stout spines: leaf-rachis and aa mes D leaflets Es 
dd the longer ones of each rachis 4.5-6 
. long: peduneles elosely fne. pu b ME 
uus fully t io in diameter: calyx about 
2m ] 
m. long: corolla 3—4 mm. he much ex- 
ceeding the ae pod stout, 3. ak ES RE 
ae about 6 mm. long. —Ham , pine 
lands, and ee Coastal Play Fla. 
to Tex.—(W. I., Mez., C. A., S. A.) 
2. V. peninsularis Small. Shrub up to 4 m. 
b armed with slender spines mostly 1—3 
long: leaf-rac ud glabrous: leaflets gla- 
brous the larger ones of each rachis 1.5- r 
m. long: e d eem 2 em. long, w 
few sessile glan Eme: slightly 
puberulent: ET yellow, less than 1 cm. in 
