1 ) , the stenosis was classified according to the Stanford classification [ 7 ] system into 4 types : ( i ) type I describes a partial obstruction of the SVC ( up to 90 % ) with remaining patency and antegrade perfusion of the azygos vein ; ( ii ) type II shows increasing obstruction ( 90-100 % ) ; ( iii ) type III is complete obstruction with ...
The tulip tree is a deciduous tree with a moderate to rapid growth rate. It has a tendency to produce a strong central leader that forms a tall, straight trunk. When young, this tree tends to have a canopy with an upright pyramidal growth habit, As it ages, the tree becomes columnar or more spreading and open.
Liriodendron tulipifera âknown as the tulip tree, American tulip tree, tuliptree, tulip poplar, whitewood, fiddle-tree, and yellow poplar âis the Western Hemisphere representative of the two-species genus Liriodendron, and the tallest eastern hardwood.riginally described by Linnaeus, Liriodendron tulipifera is one of two species (see also L.chinense) in the genus Liriodendron in the magnolia family. The name Liriodendron is Greek for lily tree. It is also called the tuliptree Magnolia, or sometimes, by the lumber industry, as the tulip poplar or yellow poplar.