Someone was  talking about colchicums, autumn crocus, the other day and this morning I went out to look at mine. I stepped out onto the piazza, pulled out an armload of lemon balm and moved the inevitable shoots of wisteria, and there they were.  Palely loitering in the shade, through no fault of their own. I planted the autumn crocus bulbs at the foot of the wisteria years ago when the herb bed was not yet full.  Of…