Figure 4
From: Pattern and process in the evolution of the sole dioecious member of Brassicaceae
Flower morphology of dioecious Lepidium sisymbrioides and two hermaphroditic relatives. (A) L. naufragorum, hermaphroditic flower with full-sized petals, four stamens (two medial and two lateral), and a functional gynoecium. (B) L. tenuicaule, hermaphroditic flower with four medial stamens and a functional gynoecium (petals absent). (C-F) L. sisymbrioides. (C) Young male flower with reduced petals (one visible, arrowhead), six stamens (four medial and two lateral), and an aborted gynoecium. (D) Mature male flower with reduced petals (two visible, arrowheads), functional stamens, central pistillode, and interstaminal nectaries (asterisks). (E) Young female flower with reduced petals (one visible, arrowhead), six stamens (four medial and two lateral) slightly delayed in their development, and gynoecium. (F) Mature female flower with reduced petals (one visible, arrowhead), staminodes, functional gynoecium, and interstaminal nectaries (asterisks). Scale bar = 250 μm. G, gynoecium; P, petal; Pd, pistillode; Se, sepal; St (l), lateral stamen; St (m), medial stamen; Std, staminode.