Plant cell the major classes of cells and tissues of roots, stems, leaves, flowers, and reproductive structures, each of which may be composed of several cell types. Parenchyma cells are living cells that have functions ranging from storage and support to photosynthesis (mesophyll cells) and phloem loading (transfer cells). Apart from the xylem and phloem in their vascular bundles, leaves are composed mainly of parenchyma cells. Some parenchyma cells, as in the epidermis, are specialized for light penetration and focusing or regulation of gas exchange, but others are among the least specialized cells in plant tissue, and may remain totipotent, capable of
Kiaeria (plant) Kiaeria (plant) Kiaeria is a genus of mosses of the family Dicranaceae. The genus is named after Franz Caspar Kiaer (1835-1893), a Norwegian doctor and bryologist. The moss is similar to small "Dicranum" species and form loose to dense cushions. The stems are erect, 1-2 inches high (occasionally higher) and are sparsely fibrous with rhizoids below. The leaves are lanceolate, erect-spreading, sometimes falcate, with full margins, to cut up against the blade tip, with emerging veining. The leaf cells are elongated at the leaf base and smooth, the top sheet portion extends to approximately square and smooth. The leaf wing