depends on structure
has visible part
quality of
whole plant
non-senesced flower head
plant structure presence
non-senesced flower head presence
non-senesced flower heads absent
A 'non-senesced flower head presence' (PPO:0002039) trait that is a 'quality of' (RO:0000080) a 'whole plant' (PO:0000003) that does not have any non-senesced flower heads (PPO:0001036).
unopened flower heads absent
open flower heads absent