Dawsonia (plant) lamella – chains of small cells on the upper surface of the leaves analogous to the mesophyll cells of vascular plant leaves. They increase the surface area of cell walls available for CO uptake, while at the same time maintaining layers of moist air between lamellae, reducing water loss. Lamella margins have a surface wax layer which prevents water from flooding into the interlamellar spaces. Dawsonia (plant) Dawsonia is a genus of acrocarpous mosses. "Dawsonia", along with other members of the order Polytrichales, are taller than most mosses and have thicker leaves. Their sporophytes have conducting systems analogous to those
Morphological symptoms of plant diseases decreased production of the number of cells. Hypoplasia results in plants or plant parts of sub-normal size. Atrophy is the reduction in the size of plant cells produced. This also results in stunted plants or plant parts. Dwarfing is the failure of a plant or a plant part to attain its full size. Rosetting is a condition where the internode of a plant do not elongate, and hence, the leaves appear close together in a cluster. Hyperplasia is the enlargement of a plant tissue due to excessive increase in the number of plant cells produced. Hyperplasia results in overdevelopment in