What low-growing/groundcover plants can you think of with flowers under 1 cm in diameter and overall plant height under 6 inches? It’s for a new project. Here is what I have so far:
Also, what do you think should be the height cutoff for the plant? The purpose of the project is to draw attention to tiny, oft-overlooked wildflowers such as chickweed etc.
It’s a Myosotis, probably arvensis or ramosissima. It depends on the fruiting pedicel:calyx ratio and if calyx at fructification is opened or closed.
PS: actually these are pretty large, if you want a real micro-one try with Galium murale
what exactly do you mean by flower? does it have to have petals?
edit: and what about composite flowers whose individual flowers are tiny?
edit 2: and I guess you don’t intend to include grasses?
in that case –
many Medicago species, Polygonum aviculare / arenastrum / equisetiformes, Prunella vulgaris, Sagina procumbens, Cardamine hirsuta / flexuosa, Polycarpon tetraphyllum, Mollugo verticillata, Anchusa aggregata, Phyla nodiflora, Lotus corniculatus / pedunculatus, Sherardia arvensis, Draba verna.
Of course you don’t have to include them all, but I’ve observed most of these.
Opening iNat page with list for a region will be more helpful, with current number of plants listing all with small flowers seems like a way to never get to your goal (people will never name them all), plus your measurements (15sm and 1sm flower diameter) fit tons of species.