Once income has been verified, use the following to determine qualifying quarters: If the year is: Credit 1 quarter for at least this amount. Credit 2 quarters for at least this amount. Credit 3 quarters for at least this amount. Credit 4 quarters for at least this amount.
Making the world better, one answer at a time. Periwinkles reproduce annually with internal fertilization of egg capsules that are then shed directly into the sea. The female periwinkle lay 10,000 to 100,000 eggs. Periwinkles reproduce annually with internal fertilization of egg capsules that are then shed directly into the sea. The female periwinkle lay 10,000 to 100,000 eggs.
By Bonnie L. Grant. Madagascar or rosy periwinkle plant (Catharantus roseus) is a spectacular plant used as a ground cover or trailing accent. Previously known as Vinca rosea, this species does not have the hardiness its look-alike cousin, Vinca minor, has attained.here to Grow Madagascar Periwinkles. Starry flowers, glossy leaves and persistent fruits characterize the rosy periwinkle plant. It is a perennial in its native region of Madagascar and in tropical to semi-tropical regions. The flowers may be found in white, pink and rosy-purple.