Annual report ..[bulletins and circulars] . 37.—Burs stealing a ride. 64 ture pod in the blossom which was the ovary, and contained theovules or young seeds. Similarly you easily distinguish morning-glory seeds from its fruits, the nasturtium seeds from the all these cases and in hundreds of others the fruit is a pod andopens at maturity to let the seeds escape, but there are also hund-reds of kinds of plants in which the ovary ripens with a singleseed inside of it and does not open at maturity. In this casethe fruit is usually but little larger than the contained seed andoften looks
Annual report ..[bulletins and circulars] . 37.—Burs stealing a ride. 64 ture pod in the blossom which was the ovary, and contained theovules or young seeds. Similarly you easily distinguish morning-glory seeds from its fruits, the nasturtium seeds from the all these cases and in hundreds of others the fruit is a pod andopens at maturity to let the seeds escape, but there are also hund-reds of kinds of plants in which the ovary ripens with a singleseed inside of it and does not open at maturity. In this casethe fruit is usually but little larger than the contained seed andoften looks like a seed itself. However that be, a single-seeded dry fruit that does not open at maturity is called an are what we find in the bur. How do I know? How can j/^?^ tell in other cases? Unfa-miliar akenes found away from the parent plant might not be soeasily detected, for the single seed within is not always readilyfound free from the ovary walls, but it can usually be identifiedby its relation to the plant. You remember t
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