You start your word with the last letter of the previous word, and the next person starts their word with the last letter of your word, and so on, and so on down the line. In this one, it's plants.
First word is... Tiger Grass
Spruce
I'm a tree hugger and I'm proud of it!!!! :D
LOL Sassy Ass wasn't a flora, but let's try...
Elderberry!
Yarrow
That name sounds more like a noise than a plant. lol
Oooh, that's a tough one. Water Lilly!