By the R5 stage, the plant has completed most of its flowering but a few newly opened flowers may be present on branches and upper main stem nodes.
(the plant; has completed; most of its flowering; T:By the R5 stage) (a few newly opened flowers; may be; present on branches and upper main stem nodes)
the plant a few newly opened flowers
has completed may be
most of its flowering T:By the R5 stage
present on branches and upper main stem nodes