Epiphyllous stamens arise from

In a flower, the stamens are attached to the petals, and when the petals are removed, the stamens are attached to the tepals.

Epiphyllous flowers have stamens that appear to emerge from the perianth lobe (tepals).

Epipetalous flowers have stamens that appear to emerge from the petals. Tube-rose contains epiphyllous stamens.

As a result, the right answer is 'Perianth lobes.'

Hence, the correct answer is option B : Perianth lobes