Line drawings of Siderasis spectabilis M.Pell. & Faden. A bracteole B front view of a bisexual flower, showing the petals ciliate with non-moniliform hairs C detail of the petal margin, showing the non-moniliform hairs D lower stamen, showing the rectangular anther connective E upper stamen, showing the quadrangular anther connective F Detail of the gynoecium, showing the velutine ovary and bent style. Line drawings by M.O.O. Pellegrini.