Flower such as the "Sarracenia" or lady-slipper orchids, have elaborate designs to ensure pollination while preventing self-pollination. "Anemophilous": flowers use the wind to move pollen from one flower to the next, examples include the grasses, Birch trees, Ragweed and Maples. They have no need to attract pollinators and therefore tend not to grow large blossoms. Whereas the pollen of entomophilous flowers tends to be large-grained, sticky, and rich in protein (another "reward" for pollinators), anemophilous flower pollen is usually small-grained, very light, and of little nutritional value to insects, though it may still be gathered in times of dearth. Honeybees and
Slipper launch launches have also been owned by other famous names, including one by the British 1950's singing trio, the Beverley Sisters and another by Louis Renault, of car company fame. In the 1960s & 1970s launches were also built by Alf Parrott at Henley-on-Thames . Alf Parrott slipper launches were initially built in marine ply then later in glass fibre, in length with Stuart Turner single-cylinder petrol engines. Alf Parrott launches can still be seen on the River Thames. During a renovation project the hull shape and construction can be viewed along with the rarely seen framing of the slipper stern.