Breeding systems in New Zealand plants 5.Pseudowintera colorata(Winteraceae)

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Abstract
The main flowering time for Pseudowintera colorata in eastern Canterbury is September. The first flowering shoot in a leaf axil can bear up to three flowers, and on each side of the resulting scar there can be a single flower in a later year. The numbers of flower parts and seeds are: petals, 4–9; stamens, 7–23; carpels, 1–4; ovules, 3–15; seeds, 1–14. Flowers are protogynous with three stages: female, 3–4 days; hermaphrodite, I day; male, 3–7 days. Insect visits appeared rare during the day. Isolated plants set few if any fruits with low seed number per fruit. Two cultivated plants self-pollinated by hand set no fruits but reciprocal crosses were successful, as were crosses with wild plants. Self-sterility is not due to inhibition of pollen-tube growth in the stigmatic tissue as pollen tubes regularly enter ovules after self-pollination. Protogyny is the rule in hermaphrodite flowers of primitive woody angiosperms.

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