Capellan flower
A Capellan flower was a flowering plant native to the planet Capella IV that had a lifespan of only a few hours. 

Sarah April had a Capellan flower while she was on board the  as it traveled to the planet Babel in 2270. 

When the Enterprise was accidentally pulled into the Beta Niobe supernova and into an antimatter universe, it was discovered that the flower was reversing in age to the point that it reverted to the seed from which it had germinated. 

After the ship and crew returned to their "positive matter universe" the flower was given a second chance to began its life anew. ()

Plants