Western Australian Flora Statistics
2011 Vascular Flora Statistics

Table 1. Analysis of the size of vascular plant divisions for various categories of name; data sourced on 1 June 2011.
Category Pteridophytes Gymnosperms Monocots Dicots* Total
Total names A 141 38 3,736 16,182 20,097
Non-current names B 34 14 1,088 4,415 5,551
Current names C 107 24 2,648 11,767 14,546
Species with infraspecies K 7 0 151 958 1,116
Current taxa D 100 24 2,497 10,809 13,430
Current alien taxa 8 7 360 843 1,218
Current native taxa 92 17 2,137 9,966 12,212
Current species E 98 24 2,337 9,831 12,290
Current alien species 8 7 352 832 1,199
Current native species 90 17 1,985 8,999 11,091
Manuscript names F 0 0 36 173 209
Phrase names G 0 0 267 1,084 1,351
Published species H 98 24 2,062 8,704 10,888
Published alien species I 8 7 352 830 1,197
Published native species J 90 17 1,710 7,874 9,691
  • 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 2011 data with the previous year (2010).

  • the addition of 180 names to the Census of Western Australian Plants database;
  • there are 49 additional taxa recognised as occuring in the State: 40 native taxa and 9 naturalised taxa;
  • the number of published species rose by 77 to 10,888, including 68 native species and 9 naturalised species;
  • a decrease, for the fourth consecutive year, in the number (-51) of manuscript names in current use, down to 209, due either to their formal publication or their conversion to phrase names as part of the Australian Plant Census project;
  • a small increase (+11) in the number of phrase names in current use, up to 1,351;
  • therefore, for the first time since these statistics have been tracked (Paczkowska and Chapman, 2000), there has been an decrease (-40) in the number of putative taxa yet to be researched and published, from 1,600 in 2010 to 1,560 in 2011 (equal to the 2008 figure).

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 2011.

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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).