Western Australian Flora Statistics
2012 Vascular Flora Statistics

Table 1. Analysis of the size of vascular plant divisions for various categories of name; data sourced on 1 June 2012.
Category Pteridophytes Gymnosperms Monocots Dicots* Total
Total names A 141 38 3,758 16,341 20,278
Non-current names B 34 14 1,110 4,523 5,681
Current names C 107 24 2,648 11,818 14,597
Species with infraspecies K 7 0 147 962 1,116
Current taxa D 100 24 2,501 10,856 13,481
Current alien taxa 8 7 361 848 1,224
Current native taxa 92 17 2,140 10,008 12,257
Current species E 98 24 2,342 9,883 12,347
Current alien species 8 7 353 837 1,205
Current native species 90 17 1,989 9,046 11,142
Manuscript names F 0 0 35 156 191
Phrase names G 0 0 265 1,101 1,366
Published species H 98 24 2,069 8,758 10,949
Published alien species I 8 7 353 834 1,202
Published native species J 90 17 1,716 7,924 9,747
Named hybrids L 0 0 28 33 61
Un-named hybrids 0 0 2 18 20
  • The term taxa here refers to entities at species level and below
  • The term species refers only to those entities at species rank
  • * The term dicot is here used in its traditional sense to retain compatibility with previous tables and for ease of use. ‘Dicotyledons’ is now strictly a paraphyletic assemblage of the Nymphaeales, ‘magnoliids’ and ‘eudicot’ clades (cf. New Systematic Sequence)

Highlights

A brief comparison of the 2012 data with the previous year (2011).

  • the addition of 179 vascular plant names to the Census of Western Australian Plants database;
  • there are 51 additional taxa recognised as occuring in the State: 45 native taxa and 6 naturalised taxa;
  • the number of published species rose by 61 to 10,949, including 56 native species and 5 naturalised species;
  • a decrease, for the fifth consecutive year, in the number (-18) of manuscript names in current use, down to 191, due either to their formal publication or their conversion to phrase names as part of the Australian Plant Census project;
  • a small increase (+15) in the number of phrase names in current use, up to 1,366;
  • therefore, for the second year in succession, there has been a small decrease (-3) in the number of putative taxa yet to be researched and published, from 1,560 in 2011 to 1,557 in 2012;
  • the addition, for the first time, of figures for the number of named and putative hybrid species recorded in the Census.

Compiler’s Note

While the current contents are manual concatenations of census data, or static tables drawn from recent published works, it is intended that future versions of this page will contain live flora statistics drawn directly from the constantly maintained datasets held at the Western Australian Herbarium. At that time we would also seek to disseminate the standard logic behind the accurate calculation of these statistics. In this way, not only will the latest figures be available at all times, but the correct methodology for calculating and applying those figures will become better understood.

Compiled by Alex Chapman; last updated on 1 June 2012.

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Did you notice?

There is a diminishing relationship between figures in subsequent rows of the table, as figures in each category are subtracted from the ones above. For example: in each column: A − B = C.

Highlighted rows

Highlighted rows are the recommended figures if you need:

  • to cite the actual number of known entities in WA (D), or
  • a conservative estimate of the number of well-documented species (H).