Margarita V. Remizowa

TL;DR: The family Hydatellaceae was recently reassigned to the early-divergent angiosperm order Nymphaeales rather than the monocot order Poales, and several hypotheses on the homologies of reproductive units in Hy datellaceae are explored.

TL;DR: In monocots, morphogenetic studies and analysis of character correlations lead to a hypothesis that the ancestral monocot conditions were postgenital fusion between carpels and presence of septal (gynopleural) nectaries, which contrasts with optimizations of individual morphological characters.

TL;DR: Most features of the ovule and embryo sac of Trithuria are consistent with a close relationship with other Nymphaeales, especially Cabombaceae.

TL;DR: Teratological forms of T. submersa indicate a tendency to fasciation and demonstrate that the inside-out structure-the primary feature that separates RUs of Hydatellaceae from more orthodox angiosperm flowers-can be at least partially modified, thus producing a morphology that is closer to an orthodox flower.

TL;DR: A single genus of Hydatel-laceae, Trithuria, is distinguished, which consists of one species in New Zealand, ten species in Australia and two species in India, and is hypothesize that two south-western Australian endemics known as Hydatella dioica and Trithia occidentalis represent male and female individuals, respectively, of the same biological species.