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 Propagation from Hibiscus Cuttings. Both hardy and tropical hibiscus are propagated from cuttings. Hibiscus cuttings are normally the preferred way of propagating hibiscus because a cutting will grow to be an exact copy of the parent plant.When using hibiscus cuttings to propagate hibiscus, start by taking the cutting. The cutting should be taken from new growth or softwood.ropagating Hibiscus from Hibiscus Seeds. While both tropical hibiscus and hardy hibiscus can be propagated from hibiscus seeds, typically only hardy hibiscus is propagated this way. This is because the seeds will not grow true to the parent plant and will look different from the parent.