Section 1: Prickly acacia—ecology and threat - Weeds Australia
Section 1: Prickly acacia—ecology and threat - Weeds Australia
Section 1: Prickly acacia—ecology and threat - Weeds Australia
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Table 1: Differences between prickle bushes<br />
Pod colour,<br />
hairiness<br />
Flowers<br />
Mesquite<br />
Prosopis spp.<br />
Pod shape Up to 20 cm<br />
long; slight<br />
constrictions<br />
between<br />
seeds; straight<br />
or slightly<br />
curved<br />
Strawcoloured,<br />
sometimes<br />
purple;<br />
no hairs<br />
Cylindrical,<br />
greenishyellow<br />
spike,<br />
5–8 cm long<br />
Leaves Fernlike; 1–4<br />
pairs; often<br />
with a gap<br />
between<br />
leaves<br />
<strong>Prickly</strong> acacia<br />
Acacia nilotica<br />
Up to 23 cm<br />
long;<br />
constrictions<br />
between<br />
seeds<br />
Blue-grey;<br />
fine hairs<br />
Ball-shaped,<br />
golden<br />
yellow, about<br />
1 cm across<br />
Fernlike;<br />
4–10 pairs;<br />
often<br />
overlapping<br />
Parkinsonia<br />
Parkinsonia<br />
aculeata<br />
Up to 10 cm<br />
long; thin<br />
constrictions<br />
between<br />
seeds;<br />
straight<br />
Strawcoloured;<br />
no hairs<br />
Five petals,<br />
mainly<br />
yellow, one<br />
with an<br />
orange spot<br />
Long,<br />
flattened leaf<br />
stalk with<br />
tiny oblong<br />
leaflets<br />
along each<br />
side<br />
Mimosa<br />
Mimosa pigra<br />
3–8 cm long;<br />
one-seeded,<br />
bristled<br />
segments,<br />
which fall<br />
away from the<br />
pod leaving<br />
a skeletal<br />
outline<br />
Brown when<br />
mature;<br />
covered with<br />
dense bristles<br />
Round, fluffy,<br />
pink or<br />
mauve balls,<br />
1–2 cm<br />
across<br />
Central leaf<br />
stalk prickly;<br />
20–25 cm<br />
long. Each<br />
leaf contains<br />
about 15<br />
opposite<br />
segments,<br />
5 cm long<br />
<strong>and</strong> divided<br />
Leaflets 6–18 pairs 10–25 pairs into pairs of 8–18 pairs<br />
leaflets that<br />
fold up when<br />
touched or<br />
injured<br />
Mimosa bush<br />
Acacia farnesiana<br />
Cigar-shaped;<br />
up to 6 cm<br />
long;<br />
slightly<br />
curved<br />
Brown to<br />
black;<br />
no hairs<br />
Ball-shaped,<br />
golden<br />
yellow, about<br />
1 cm across<br />
Fernlike; 2–4<br />
pairs; with a<br />
gap between<br />
leaves<br />
5
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