[From many - one.]

“Flora are very resilient and could very well have survived the flood”

!!!!
Which flora do you have in mind that are “very resilient?”

Fungal spores are pretty resilient, and can have survived a worldwide flood, but God is not mentioned as having created fungi. Perhaps they don’t exist.

[CottShop]

God isn’t mentioned as creating many things specifically- just everythign in general, and some htings specifically.

Seeds can survive soakings, even sprout on sludge rafts later to take root dry land. pollen also survives. Acorns can survvive, some trees can survive being submerged for weeks- on and on it goes- many can.

[bvw]

Genesis 1:11 -- "Let the earth sprout forth [1] vegetation, [2] plants that have seeds, [3] trees that have fruit with seeds of their own kind, on the earth."

Many translate [1] as grass. But since [2] would include grass, that means [1] is better translated as "vegetation" that does not produce seeds. Not taking mold spore to be seed that means [1] "vegetation" includes things like mold and fungi.