Pulmonary blood pressure is normally a lot lower than systemic blood pressure. Normal pulmonary artery pressure is 8-20 mm Hg at rest. If the pressure in the pulmonary artery is greater than 25 mm Hg at rest or 30 mmHg during physical activity, it is abnormally high and is called pulmonary hypertension.
Plant Types. Tropical hibiscus (Hibiscus rosa-sinensis) are evergreen, or shrubs that keep their leaves all year. On the other hand, hardy hibiscus, members of the genus Hibiscus with more than 200 species, are deciduous. Their leaves die off in winter. They have heights up to 15 feet and widths from 4 to 8 feet.
Hibiscus syriacus. Rose of Sharon (Hibiscus syriacus) is a deciduous shrub that brings a bit of tropical beauty to more temperate climates. It features a vase-shaped form that grows from 10 to 15 feet high with a spread of three to six feet. Depending on the cultivar, the flowers range from white to deep pinkish purple.