TY - JOUR T1 - Evolution of the helobial flower JF - Aquatic BotanyAquatic Botany Y1 - 1993 A1 - Posluszny, U. A1 - Charlton, W.A. SP - 303 EP - 324 AB - We propose a hypothesis for the derivation of flowers and reproductive structures in the Alismatidae (Helobiae) which is based on evolution of features of 'flower' and 'inflorescence' in different ways from an ancestral pre-floral condition with a multiaxial reproductive structure. We base this proposition on the existence of many cases of structures with attributes of both 'flower' and 'inflorescence'. In one suite of cases the lateral axes appear to have become flower-like while the main axis has become an inflorescence axis; in another the axes have become inflorescence-like proximally and flower-like distally. Like other evolutionary plans, it can also be read in the reverse direction, and would then imply that features of 'flower' and 'inflorescence' had become re-partitioned in different ways in the group. We interpret as reduced the simpler forms of flower among the group. VL - 44 N1 - haufenweise Literaturangaben von Sattler, Kaul, Posluszny, Singh etc. ER - TY - JOUR T1 - Morphology and development of the reproductive shoots of Lilaea scilloides (Poir.) Haum. (Alismatidae) JF - Botanical Journal of the Linnean SocietyBotanical Journal of the Linnean Society Y1 - 1986 A1 - Posluszny, U. A1 - Charlton, W.A. A1 - Jain, D.K. SP - 323 EP - 342 KW - Bisexual flower, floral development, floral morphology, sympodial branching, unisexual flower VL - 92 ER - TY - JOUR T1 - Features of the inflorescence of Triglochin maritima JF - Canadian Journal of BotanyCanadian Journal of Botany Y1 - 1981 A1 - Charlton, W.A. SP - 2108 EP - 2115 AB - The arrangement of floral primordia on the inflorescence has been examined in Triglochin maritima. Different inflorescences have spiral or multijugate forms of phyllotaxis. The inflorescence apex does not seem to give rise directly to a terminal flower, though floral primordia may ultimately arise on or very near the summit of the meristem. In the latter case a residual apex is left. These observations are combined with previous scattered data on the inflorescences of Triglochin. It is concluded that Triglochin inflorescences have a number of characters which are more usually associated with flowers. VL - 59 ER -