achenes ball blow clock common Dandelion dandelion clock dispersal head parachute ball pattern plant puff puff ball puffs round seeds sphere spherical spread spreading Taraxacum officinale texture weed widespread wind-aided wind-blown wind-spread wishie black brittle closeup grow grows heads macro milky nature parachute plants sap seed taproot white wind abstract angled angles appearance atmosphere atmospheric background blended blue climate climatology cloud clouds colors colours conditions curled curved direction directional fine formations light lines meteorological-phenomenon movement pointers shapes skies sky sky-hook southern streaks streaky sun textures thin trail trailing vaporish vapourish variations various-cloud-formations weather wispy