Rearrangement of the Herbarium collections

As part of a move to new premises in 2011, the Western Australian Herbarium rearranged its vascular plant collections. The revised arrangement is largely based on the phylogeny of the Angiosperm Phylogeny Group (APGIII), a global collaborative effort to better understand the relationships of plant groups. The change to the APGIII system involved some family level changes. Some of these required the simple merging of one or more families (e.g. Epacridaceae into Ericaceae; Sterculiaceae and Tiliaceae into Malvaceae; Papilionaceae, Mimosaceae and Caesalpiniaceae into Fabaceae), whilst others necessitated more complex changes to family circumscriptions.

The changes reflect the vastly improved modern knowledge of flowering plant relationships resulting from the APGIII project and other taxonomic work around the world. The previous arrangement of families at the Herbarium, based on the Engler and Prantl sequence of 1905, had been in use since the time of Charles Gardner, and was becoming increasingly out of step with this modern understanding.

Many herbaria around the world are adopting similar phylogenetic arrangements based on APGIII. Being based on a wide range of evidence and repeatable analysis methods, it is expected that this system will be relatively stable, although further changes are always possible as new evidence comes to light.

The tables below list the families that have been changed in the Herbarium (and hence in FloraBase and Max updates). Table 1 lists cases where an entire family has moved or been renamed. Table 2 lists cases where some genera have been moved to a new family and others retained, or where different genera have moved to different families. An introduction to the Linear Sequence number we use to arrange our collection is also available.

Table 2. Family changes involving splits to old families; cases where some genera have been moved to a new family and others retained, or where different genera have moved to different families
Old Family Genus New Family
Alliaceae Agapanthus Agapanthaceae
Anthericaceae Arthropodium Asparagaceae
  Laxmannia Asparagaceae
  Murchisonia Asparagaceae
  Sowerbaea Asparagaceae
  Thysanotus Asparagaceae
  Chamaescilla Asparagaceae
  Chlorophytum Asparagaceae
  Dichopogon Asparagaceae
  Agrostocrinum Hemerocallidaceae
  Arnocrinum Hemerocallidaceae
  Caesia Hemerocallidaceae
  Hensmania Hemerocallidaceae
  Hodgsoniola Hemerocallidaceae
  Johnsonia Hemerocallidaceae
  Stawellia Hemerocallidaceae
  Corynotheca Hemerocallidaceae
  Tricoryne Hemerocallidaceae
Apiaceae Hydrocotyle Araliaceae
  Neosciadium Araliaceae
  Trachymene Araliaceae
  Uldinia Araliaceae
Capparaceae Cleome Cleomaceae
Clusiaceae Hypericum Hypericaceae
Cunoniaceae Aphanopetalum Aphanopetalaceae
Dasypogonaceae Acanthocarpus Asparagaceae
  Chamaexeros Asparagaceae
  Lomandra Asparagaceae
  Xerolirion Asparagaceae
Euphorbiaceae Antidesma Phyllanthaceae
  Breynia Phyllanthaceae
  Bridelia Phyllanthaceae
  Flueggea Phyllanthaceae
  Glochidion Phyllanthaceae
  Margaritaria Phyllanthaceae
  Phyllanthus Phyllanthaceae
  Poranthera Phyllanthaceae
  Sauropus Phyllanthaceae
  Leptopus Phyllanthaceae
  Petalostigma Picrodendraceae
  Drypetes Putranjivaceae
Hydrophyllaceae Phacelia Boraginaceae
  Wigandia Boraginaceae
  Hydrolea Hydroleaceae
Potamogetonaceae Ruppia Ruppiaceae
Restionaceae Anarthria Anarthriaceae
Scrophulariaceae Lindernia Linderniaceae
  Centranthera Orobanchaceae
  Striga Orobanchaceae
  Bartsia Orobanchaceae
  Parentucellia Orobanchaceae
  Elacholoma Phrymaceae
  Glossostigma Phrymaceae
  Mimulus Phrymaceae
  Peplidium Phrymaceae
  Dopatrium Plantaginaceae
  Bacopa Plantaginaceae
  Gratiola Plantaginaceae
  Limnophila Plantaginaceae
  Stemodia Plantaginaceae
  Veronica Plantaginaceae
  Misopates Plantaginaceae
  Linaria Plantaginaceae
  Maurandya Plantaginaceae
  Scoparia Plantaginaceae
  Buchnera Orobanchaceae
  Euphrasia Orobanchaceae
  Rhamphicarpa Orobanchaceae
  Microcarpaea Phrymaceae
  Kickxia Plantaginaceae
  Cymbalaria Plantaginaceae
Simaroubaceae Harrisonia Rutaceae
Zygophyllaceae Nitraria Nitrariaceae

Written by Kevin Thiele and the Curation Team; 19 January 2010.