Summer-dormant plants green in fall/winter/spring?
I've observed a garden as a whole does better when there are species in it that are green in very early spring and very late fall. My hypotheses include that those plants compete against winter-growing weeds, and that they feed mycorrizal communities year-round which help summer plants.
But aside from speculation, hot, dry summers are common here and winter-growing plants seem to thrive by taking advantage of cold, even if it's not until mid-spring spring or late spring when they finally bloom. Winter plants are an untapped potential when it comes to maximizing garden space, and I love seeing new growth popping up in the late fall when others plants are dying.
I'm thinking of summer-dormant species like oriental poppies, which leaf out in fall and again in early spring to grow from seed-to-mature much quicker than you'd expect for such a showy plant; Muscari with fall/winter leaves, hardy cyclamen, Arum Italicum (which I've never tried but I'm sure they wouldn't be "invasive" in our semi-arid climate like they are elsewhere), etc.
Can anybody suggest some other species that put on growth in the late fall or early spring - or even all winter - when most plants are dormant? I live in Zone 5.