Pachymitus

{{short description|Genus of plant}}

{{Speciesbox

|image = Pachymitus cardaminoides.jpg

|image_caption = Pachymitus cardaminoides at Terrick Terrick National Park

|genus = Pachymitus

|parent_authority = O.E.Schulz

|species = cardaminoides

|authority =(F.Muell.) O.E.Schulz{{cite web |url=http://www.anbg.gov.au/cgi-bin/apni?TAXON_NAME=Pachymitus|title= Pachymitus|accessdate=19 April 2011|work= Australian Plant Name Index (APNI), IBIS database|publisher = Centre for Plant Biodiversity Research, Australian Government, Canberra}}

|synonyms =

• Blennodia cardaminoides (F.Muell.) Benth.
• Blennodia lucae (F.Muell.) Maiden & Betche
• Erysimum lucae F.Muell.
• Pachymitus lucae (F.Muell.) O.E.Schulz
• Sisymbrium cardaminoides F.Muell.
• Sisymbrium lucae (F.Muell.) F.Muell.

}}

Pachymitus is a monotypic plant genus in the mustard family Brassicaceae. The sole species is Pachymitus cardaminoides, commonly known as sand cress, which is native to Australia.{{cite web |url=http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=gn&name=Pachymitus |title=Genus Pachymitus|accessdate=19 April 2011|author=|work= PlantNET - New South Wales Flora Online |publisher=Royal Botanic Gardens & Domain Trust, Sydney Australia}}{{cite book |title=Wild Plants of Victoria (database)|year=2009 |publisher=Viridans Biological Databases & Department of Sustainability and Environment}} It occurs in the states of New South Wales, Victoria and South Australia.

Originally collected from near the mouth of the Murray River, the species was originally described as Sisymbrium cardaminoides by Ferdinand von Mueller in 1855,{{cite web |url=http://www.anbg.gov.au/cgi-bin/apni?taxon_id=23774 |title= Sisymbrium cardaminoides F.Muell.|accessdate=23 April 2011|work= Australian Plant Name Index (APNI), IBIS database|publisher = Centre for Plant Biodiversity Research, Australian Government, Canberra}} before the genus Pachymitus was erected by Otto Eugen Schulz in 1924.

Pachymitus cardaminoides is a small herbaceous shrub which grows to 30 cm (12 in) in height. It is found in inland New South Wales, Victoria, and South Australia.{{NSW Flora Online|genus=Pachymitus |species=cardaminoides |author=L. Retter & G. J. Harden}}