This taxon name is not current. The available references for this name are:
Acaena echinata var. tylacantha Orchard is more recently known as Acaena echinata Nees
Reason: See D.E. Symon et al. in J.Adelaide Bot.Gard. 19:55 (2000)
See also: A longer explanation of these and other terms in our Plant Names Primer.
A taxon name which is no longer current will retain its ‘Threatened’ status until publication of the next Threatened Flora - Rare Flora Notice.
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Western Australian Herbarium (1998–). FloraBase—the Western Australian Flora. Department of Biodiversity, Conservation and Attractions. https://florabase.dpaw.wa.gov.au/