Filaments ca. 1.5 mm, united forming an open sheath, inside of sheath arachnoid, lower 1/2 of sheath adnate with petals.

• 花丝长约1.；5毫米，合生形成开放的鞘，鞘内具蛛丝状毛，鞘下部1/2与花瓣贴生。