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Species numbers

You can derive taxon numbers for members of Acacia sens. lat. by using the WorldWideWattle Advanced Search  feature which is located under Species Gallery. Advanced Search enables species (and taxa) numbers to be obtained for Acacia, Acaciella, Mariosousa, Senegalia and Vachellia for countries and various other geographic areas of the world.

For user convenience the Tables below summarize species numbers for major geographic areas and also for some areas and taxa (relevant to Australia) where numbers cannot be obtained via Advanced Search.

Acacia sens. lat. comprises almost 1,500 accepted species and these are distributed in tropical, subtropical and warm temperate parts of the world. The general regions in which these species occur are shown in the table below.

Acacia sens. lat. worldwide

Table 1. Numbers of indigenous, currently accepted, described species1 of Acacia sens. lat. worldwide (numbers derived from WorldWideWattle database)

Genus

Americas

Africa2

Asia

Australia & Pacific

Total no. of spp

Acacia

0

0

11

1059

1064

Acaciella

15

0

0

0

15

Mariosousa

13

0

0

0

13

Senegalia

104

62

43

2

212

Vachellia

61

75

31

9

165

Total number of species

193

137

85

1070

1469

1 Excluding informal taxa and hybrid formula taxa.

2 Including Madagascar, Reunion and Mauritius.

Australian species of Acacia

Within Australia there are 1053 currently accepted, described species of Acacia, but this number increases to 1176 when infraspecific taxa are included. There are also 146 informal (Phrase Name) taxa currently recognized in Australia that require further study. The Australian species are widely and unevenly distributed across the continent (see Info Gallery Distribution for more information) and occur in all States and mainland Territories (see Table 2 below). As shown in Table 3 the Australian Acacia flora is contained in seven taxonomic sections. As noted elsewhere on WorldWideWattle there are only 19 species of Acacia that extend beyond Australia.

The genera Senegalia and Vachellia are poorly represented in Australia being represented by two and nine species respectively.

Table 2. Numbers of Acacia taxa and species in Australian and its States and Territories1 (numbers derived from WorldWideWattle database)

Region

Number of taxa

Number of species

Australia

1176

1053

Western Australia

728

637

Queensland

288

274

New South Wales

250

235

Northern Territory

183

176

South Australia

138

134

Victoria

122

109

Australian Capital Territory

24

23

Tasmania

25

21

1 Excluding informal taxa and hybrid formula, and taxa of Senegalia and Vachellia

Table 3. Numbers of Australian Acacia species in each of the major infrageneric groups, i.e. Sections1 (numbers derived from WorldWideWattle database)

Section

Species numbers

Acacia (syn sect. Phyllodineae)

421

Juliflorae

289

Plurinerves

226

Botrycephalae

44

Pulchellae

27

Alatae

23

Lycopodiifoliae

24

1 Excluding informal taxa and hybrid formula, and taxa of Senegalia and Vachellia

The patterns of distribution of these species across the continent are shown elsewhere on WorldWideWattle.

Page last updated: Thursday 15 December 2016