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.
a.k.a., Ponytail Fern, Bottle Brush Fern, Emerald Fern. Asparagus densiflorus 'Meyersii'. Foxtail Ferns, though a member of the Lily family and not a fern at all, tempts the Indoor Gardener with its fascinating architectural shape, graceful draping, and ease of care. An evergreen shrub with needlelike stems, Foxtail Ferns exhibit more density than the closely related and more common Asparagus Fern - Sprengeri. Also called the Ponytail, Bottle Brush, and Emerald fern, the foxtail's branches create a cylindrical pattern around its core, growing upward like spires.