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Photos 1-3 compare D. lucidum (left) with D. microcarpon (middle) and D. dichotomum var. dichotomum (right).

It co-occurs and mingles with microcarpon, and its leaf proportions can be very similar to the autumnal leaves of micro. However, D. lucidum lacks bearded nodes (the lowest one may have some hairs) and its leaves are consistently sized; micro has conspicuously larger vernal leaves. It also has thinner, wirey culms and it has a more horizonal/creeping habit.

D. dichotomum var. dichotomum is more of an upland species and is unlikely to closely associate, but it can occur in uplands adjacent to seeps and is also visually similar. dichotomum has a strictly upright habit, proportionately longer/narrower leaves, and wider culms; its leaves are also held differently (more regular and parallel to the ground?).

Comparison of five species of Dichanthelium, from left to right: D. sphaerocarpon, D. boscii, D. commutatum var. commutatum, D. commutatum var. ashei, D. dichotomum var. dichotomum.

Images compare the spikelets, lowest node, widest leaf, and overall habit.