While most Lovegrasses are difficult to distinguish, a couple of them are fairly easy. All have spearhead-shaped spikelets.
Eragrostis cilianensisStinkgrass Spearhead Spikelets
Eragrostis curvulaWeeping Lovegrass Very Long, Thin Leaves
Eragrostis mexicanaMexican Lovegrass Spearpoint Spikelets