Self-pollination in the case of the short-styled form, for example, is not excluded.
"Darwin and Modern Science" by A.C. Seward and Others
Pollination in most grasses is brought about by wind, though in a few cases self-pollination occurs.
"A Handbook of Some South Indian Grasses" by Rai Bahadur K. Ranga Achariyar
This is necessary to prevent self-pollination.
"Manual of American Grape-Growing" by U. P. Hedrick
I believe all apple blossoms are self-pollinating, and there is no advantage in mixed plantings.
"The Apple" by Various
This favours cross-pollination as compared with self-pollination.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 7" by Various
DICHOGAMY, in flowers, the condition in which anthers and stigmas ripen at different times, whereby self-pollination is effectually prevented.
"The New Gresham Encyclopedia" by Various
The tomato is largely but not wholly self pollinated and pollen is not carried far.
"The Tomato" by Paul Work
Pollination, self and cross.
"A Civic Biology" by George William Hunter
While in a few self- pollinating plants, pollen reaches the stigma before the flower opens, most flowers have various schemes to prevent being pollinated by their own pollen.
Tomatoes are one of the plants that can self- pollinate from the same flower, but most farmers agree that cross- pollination yields healthier seedlings and bigger fruit.
Self-pollinating hepatica is one the earliest wildflowers to bloom in spring.
Heirlooms are self-pollinating so their seeds produce the same fruit generation to generation.
Pomegranates are both self-pollinated and cross- pollinated by bees.
Pomegranates are self-pollinating, so it doesn't need another tree.