Spectral type and absolute magnitude relationships of dwarfs (black pluses), subdwarfs (red dots) and extreme subdwarfs (blue diamonds). M0 = 0, M5 = 5, L0 = 10, L5 = 15. Green and black lines on the left-hand panels are best fits of dwarfs and all subdwarfs, respectively. Green, cyan and magenta lines on the right-hand panels are best fits of dwarfs, subdwarfs and extreme subdwarfs, respectively. M and L subdwarfs with two independent parallax measurements are plotted twice.