The Middlemist Red Camellia, or Camellia japonica 'Middlemist's Red,' is an exceptionally rare flower with vibrant pinkish-red petals. With only two known living specimens in the world, both located in New Zealand and the United Kingdom, it holds the title of the rarest flowering plant on Earth.

The Middlemist's red belongs to the camellia genus and was imported from China as a luxury item in 1804, but was wiped from its native country. The credit for bringing the flower to Chiswick, West London, goes to a nurseryman from Shepherd's Bush named John Middlemist, who the flower was named after.

Agave Americana Blooms Once Every Hundred Years You have to admit the plant looks like it's from another time (Jurassic or Triassic) or possibly from another planet. But no, the agave americana is definitely from Earth.

Celosia can bloom from June until frost. The flowers are tough, long-lasting and unlikely to fall off the plant after they die, so you will need to snip them off to keep the plant looking fresh. Deadheading your Celosia will also encourage new blooms.