Back to Top Causes. Toxic megacolon occurs as a complication of inflammatory bowel disease, such as ulcerative colitis and Crohnâs disease, and infections of the colon. The term toxic means that this complication occurs with infection or inflammation and is very dangerous.This is not the same as other forms of megacolon, such as pseudo-obstruction, acute colonic ileus, or congenital colonic dilation. These conditions occur without infection or inflammation.he term toxic means that this complication occurs with infection or inflammation and is very dangerous. This is not the same as other forms of megacolon, such as pseudo-obstruction, acute colonic ileus, or congenital colonic dilation. These conditions occur without infection or inflammation.
Leaf: The green, photosynthetic part of the plant is technically a megaphyll and in ferns, it is often referred to as a frond. New leaves typically expand by the unrolling of a tight spiral called a crozier or fiddlehead fern. This uncurling of the leaf is termed circinate vernation.
Asparagus meyeri âFoxtail Fernâ. Asparagus meyeri is an evergreen arching perennial that has feathery, needle-like, stems. Foxtail Fern is often thought of as a fern but really it is not a true fern, i.e. it produces seeds rather than spores. This âFernâ is however related to the vegetable Asparagus which also has fern-like foliage. Foxtail Fern is very similar to Asparagus Fern only its growth habit is very dense and it produces tail-like fronds for a fluffy âFoxtailâ look. In the summer the plant has small white flowers that are followed by bright red berries.