Tragopogon porrifolius 2 Published May 24, 2020 at 736 × 1000 in Tragopogon porrifolius 2 People keep wanting to know the ‘weed’ which has appeared in their gardens. It is Tragopogon porrifolius or Salsify which was once used as a root vegetable. Its common name is ‘Jack go to bed at noon’ as the flowers close up after midday. Ann Fritchley