The primary cause of respiratory alkalosis is hyperventilation. This rapid, deep breathing can be caused by conditions related to the lungs like pneumonia, lung disease, or asthma. More commonly, hyperventilation is associated with anxiety, fever, drug overdose, carbon monoxide poisoning, or serious infections.
By Rhonda Stewart. Lady Fern is a native perennial upright fern that can reach 2-5 feet in height. The leaves are a bright green, with a fine-textured lacy appearance, and single fronds can measure up to 1â wide and 3â in length. The frond stalks are green to purple or red in color.
These ferns, whose native habitats are usually under woodland canopies, don't do well in full sun, but they can thrive in shade that's too much for most other plants. The Western maidenhair fern (Adiantum aleuticum), for example, is a shade-loving native of western North America, ranging from Alaska to Mexico.