Western underground orchid
(Rhizanthella gardneri) (Credit: Andrew Brown)
This unusual orchid spends its entire life underground. It even flowers underground, in late May and early June, producing more than a hundred cream to reddish flowers, and a strong fragrance.
It only lives in the Broom bush shrubland in western Australia. It lacks chlorophyll so cannot draw energy from sunlight like most plants.
Instead it takes nutrients from the roots of broom bush, by parasitizing the fungi associated with it.
There are thought to be fewer than 50 plants. The species has not been assessed by the IUCN, but Western Australia classes it as critically endangered.
(Mammillaria herrerae) (Credit: Petar43 / Wikimedia, CC by SA 4.0)
Found only in the mountains of Queretaro in Mexico, the golf ball is a small white-ish cactus that looks, you’ve guessed it, like a golf ball.
Its beautiful pink flowers have made it popular among horticulturists, so many wild cacti are illegally collected.
As a result, the population has dropped more than 95% over the last 20 years.