Today’s ID-a-thon target is for you. Echinoderms and
Flowering plants https://www.inaturalist.org/pages/id-a-thon#flowers
Clearly presented by @kestrel out of her CNC and iNat staff experience. 
https://www.inaturalist.org/observations/identify?taxon_id=47125&lrank=subphylum&hrank=subphylum&place_id=any this URL contains half a million obs waiting at flowers (Angiosperm) Use the available filters to bash it down to a manageable size, starting with your preferred location. Then sort by Date Observed (same flowers will come up in their season) and Date Ascending (satisfying to clear an obs that has been ignored for months or even years!)
And learn from each notification that rolls in to meet you.