I spent a lot of my weekend looking at clusters of three heart-shaped leaves. You may have done the same, possibly (just possibly) in the company of a Guiness or something similar. And in the course of all that shamrock-ogling, I became slightly vexed that the shamrock’s officially recognized botanical representative is Trifolium dubium, the common suckling clover. Dubium, indeed. Its leaves are dinky, and they’re not even consistently heart-shaped. So for your consideration, I hereby nominate the various species of Oxalis (wood sorrel) that are overtaking my yard as shamrock alternatives.