A normal adult thyroid gland weighs 10 to 20 g and receives blood from bilateral superior and inferior thyroid arteries and a small artery called the thyroid ima. The thyroid secretes two hormones. Thyroxine (T 4) makes about 90% of hormone production, and triiodothyronine (T 3) produces the other 10%.
Fast Growing Cold Hardy Tree. - Grows up to 5 ft per year! The Quaking Aspen is well known for thriving in cold climates and poor soil... but it's also a brightly colored tree with many desirable characteristics.
Size and Growth. Corkscrew willows are fast growing and reach a height of about 30 feet. Like other willows, they prefer moist soil. The roots stay shallow and near the surface, sometimes even pushing upwards as the tree ages. Keep this in mind when choosing a site to plant a corkscrew willow.