Common Whitlowgrass used be separated into three subspecies of Erophila verna but these are now three separate species: E. glabrescens, E. verna and E. majuscula. Very, very roughly E. glabrescens is mostly bald with only a few hairs, E. verna has hairs all over and E. majuscula is densely hairy.

BUT..... it isn't as simple as that because the features of the plant as a budding rosette can be quite different from the mature plant with both flowers and seeds. I have been shown the differences between these three plants by no less a person than Dr Tim Rich but my frequent subsequent examination of Whitlowgrasses hasn't always led to a definite conclusion. Fortunately we were shown this one on our WFS meeting so I'm happy to accept the word of our leader.