Heliotropism Reference Libraries
The sunflower (Helianthus annuus) is an annual plant in the family Asteraceae. The stem of the flower can grow up to 3 meters tall and the large flower head can reach up to 30cm in diameter. The sunflower is notable for turning to face the Sun, a behavior known as heliotropism. History Sunflowers are native to the Americas, and were domesticated around 1000 B.C. Francisco Pizarro found...
- A Roman unit of weight, 1⁄1728 of a pound.
- A weight of four grains used in weighing gold and precious stones; a carat.
- In anatomy, a formation suggesting a husk or pod.
- The lowest unit in the Roman coinage, the twenty-fourth part of a solidus.
- A coin of base silver of the Gothic and Lombard kings of Italy.