https://earthsky.org/earth/the-odd-life-of-an-underground-orchid/ http://www.earthsendangered.com/profile.asp?gr=P&view=c&ID=9&sp=1107 http://www.sbs.utexas.edu/fowler/streptanthus/bracted_twistflower.htm https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.139880/Helianthus_paradoxus https://wordpress.org/openverse/?referrer=creativecommons.org http://www.environment.gov.au/biodiversity/threatened/species/pubs/20109-conservation-advice-16122016.pdf