Adjective modifier

• white: Group 11 Changing Colors pure white perianth with pale lemon-yellow shades & white then pale pink corona.

• yellow: Look out for its rather dog-eared, pale primrose yellow perianth chiseled, richer yellow trumpet, and slightly nodding poise.

Modifies a noun

• segment: Under much higher magnification, the tip of the perianth segment is covered with tiny, short, curved hairs.

• tube: It has stout, upright, goblet-shaped clean white blooms, which are produced in autumn and supported on sturdy, green perianth tubes.