Western Australian Flora Statistics
2009 Vascular Flora Statistics

Table 1. Analysis of the size of vascular plant divisions for various categories of name; data sourced on 1 June 2009.
Category Pteridophytes Gymnosperms Monocots Dicots* Total
Total names A 141 35 3,635 15,720 19,531
Non-current names B 36 11 1,062 4,111 5,220
Current names C 105 24 2,573 11,609 14,311
Current taxa D 98 24 2,430 10,661 13,213
Current alien taxa 8 7 352 832 1,199
Current native taxa 90 17 2,078 9,829 12,014
Current species E 96 24 2,271 9,669 12,060
Manuscript names F 0 0 39 264 303
Phrase names G 0 0 222 1,000 1,222
Published species H 96 24 2,035 8,569 10,724
Published alien species I 8 7 343 818 1,176
Published native species J 88 17 1,692 7,751 9,548
  • 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)


A brief comparison of the 2009 data with the previous year (2008).

  • the addition of 254 names to the Census of Western Australian Plants database;
  • a decrease, for the second consecutive year, in the number (-71) of manuscript names in current use, down to 303, due to the formal publication of some of these putative taxa combined with the conversion of many manuscript names to phrase names as part of the Australian Plant Census project;
  • a small increase (+36) in the number of phrase names in current use, up to 1222;
  • a continued increase in the number of published species, up 116 (111 native and 5 alien) to 10,724 species.
  • For the first time, additional figures have been calculated to split the number of current taxa into native and alien components.
    Of the 13,213 current taxa of vascular plants in the Census, there are 1,199 naturalised aliens and 12,014 native plants.

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 2009.

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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).