Western Australian Flora Statistics
2017 Vascular Flora Statistics

Table 1. Analysis of the size of vascular plant divisions for various categories of name; data sourced on 1 June 2017.
Category Pteridophytes Gymnosperms Monocots Dicots* Total
Total names A 144 41 3,984 17,301 21,470
Non-current names B 36 14 1,256 5,209 6,515
Current names C 108 27 2,728 12,092 14,955
Species with infraspecies K 8 0 146 974 1,128
Current taxa D 100 27 2,582 11,118 13,827
Current alien taxa 8 10 373 915 1,306
Current native taxa 92 17 2,209 10,203 12,521
Current species E 98 27 2,422 10,130 12,677
Current alien species 8 10 361 898 1,277
Current native species 90 17 2,061 9,232 11,400
Manuscript names F 0 0 6 32 38
Phrase names G 0 0 227 1,018 1,245
Published species H 98 27 2,200 9,202 11,527
Published alien species I 8 10 361 896 1,275
Published native species J 90 17 1,839 8,306 10,252
Named hybrids L 0 0 26 39 65
Un-named hybrids 0 0 2 36 38
  • 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 2017 data with the previous year (2016).

  • the addition of 182 vascular plant names to the Census of Western Australian Plants database (including 143 synonyms);
  • there are 42 additional taxa recognised as occurring in the State: 40 native taxa and only 2 naturalised taxa;
  • the number of published species rose by 91 to 11,527, including 90 native species and just 1 naturalised species;
  • a decrease of 54 putative taxa awaiting analysis and description: manuscript names (down by 8 to 38), and phrase names (down by 46 to 1,245), due predominantly to their transition into published taxa;
  • so, for the seventh year in succession, there has been a decrease (-54) in the number of putative taxa yet to be researched and published, from 1,337 in 2016 to 1,283 in 2017;
  • note that at this rate of reduction (54 taxa per year), and assuming no further discoveries and no increase in taxonomic resource in the State, it could take another 24 years to complete the inventory of just the vascular plant species in the State.

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 8 June 2017.

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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).