The Histogenesis and Evolution of Integuments in Onagraceae

The mode of initiation and subsequent growth of the inner (i.1.)and outer (o.i.) integuments were a and compared i in 40 species, representing : all seven tribes and all 17 genera of Onagraceae.The our different types of developmental iude of the o.i. are characterized: D o.i. of subdermal origin--Lopezia (Lopezieae), Fuchsia (Fuchsieae), and Circaea (Circaeeae); 2) 0.1.subdermal cells dividing more a (Onagreae); 3) o.i. of both derm less actively than those of the ame l cells-Hi 4) o.i. of dermal o sonia, Clarkia, Gayophytum, Gongy both dermal and subdermal origin, actively than ee 2 the dermal cells-Oenothera and Stenosiphon subderm with derivatives of the ay, RRE and Calylophus and Gaura (Onagreae); rigin-Ludwigia (J Sere. on aac and Epilobium (Epilobieae); and Camislocarpus, Heterogaura, and unexpected close similarity of Hauya (Hauyeae) to peor dbs iin and Gaura (Onagreae), among which is shared an apparently derived state of this character ra e patterns of relationships suggested on the basis of the ae Sea mode of.the o.i.closely accord with th viden derived from other lines of evidence.The results from Onagraceae confirm that the is bot characters of integuments are valuable indicators of relationship at a generic level.