Western Australian Flora Statistics
2010 Vascular Flora Statistics

Table 1. Analysis of the size of vascular plant divisions for various categories of name; data sourced on 1 June 2010.
Category Pteridophytes Gymnosperms Monocots Dicots* Total
Total names A 141 35 3,727 16,014 19,917
Non-current names B 34 11 1,082 4,295 5,422
Current names C 107 24 2,645 11,719 14,495
Species with infraspecies K 7 0 151 956 1,114
Current taxa D 100 24 2,494 10,763 13,381
Current alien taxa 8 7 359 835 1,209
Current native taxa 92 17 2,135 9,928 12,172
Current species E 98 24 2,336 9,766 12,224
Current alien species 8 7 351 824 1,190
Current native species 90 17 1,985 8,942 11,034
Manuscript names F 0 0 36 224 260
Phrase names G 0 0 267 1,073 1,340
Published species H 98 24 2,060 8,629 10,811
Published alien species I 8 7 351 822 1,188
Published native species J 90 17 1,709 7,807 9,623
  • 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 2010 data with the previous year (2009).

  • the addition of 386 names to the Census of Western Australian Plants database;
  • there are 168 additional taxa recognised as occurring in the State: 158 native taxa and 10 naturalised taxa;
  • the number of published species rose by 87 to 10,811, including 75 native species and 12 naturalised species;
  • a decrease, for the third consecutive year, in the number (-43) of manuscript names in current use, down to 260, due either to their formal publication or their conversion to phrase names as part of the Australian Plant Census project;
  • a significant increase (+118) in the number of phrase names in current use, up to 1,340;
  • therefore, there has been an increase (75) in the number of putative taxa yet to be researched and published, from 1,525 in 2009 to 1,600 in 2010;
  • for the first time, additional figures have been calculated to split the number of current species into native and alien components: of the 12,224 current species of vascular plants in the Census, there are 1,190 naturalised species and 11,034 native species;

New classification

This is also the first floristic summary published subsequent to the WA Herbarium's adoption of the APGIII classification, which has seen a major rearrangement of family (and some generic) concepts and relationships. These changes are not so noticeable at the species rank, however, you will notice that the accompanying 'Green's Census' tables are now arranged according to the new linear sequence and detail the currently accepted familial classification.

Table 2 below compares the number of taxa at each major rank in the four 'classical' vascular plant groups under the old Englerian classification (2009) and the new APGIII classification (2010). (Cf. Table 4 from 'Green's Census'.)

Table 2. Size of Vascular Plant Divisions in 2010 (and 2009)
Group Families Genera Species
2010 2009 2010 2009 2010 2009
Pteridophytes 20 24 45 45 98 96
Gymnosperms 5 5 7 7 24 24
Monocots 50 51 405 408 2,060 2,035
Dicots 136 150 1,136 1,135 8,629 8,569
Total 211 230 1,593 1,595 10,811 10,724

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 2010.

Related content

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).