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Douglas Spruce
The Douglas fir (''Pseudotsuga menziesii'') is an evergreen conifer species in the pine family, Pinaceae. It is native to western North America and is also known as Douglas-fir, Douglas spruce, Oregon pine, and Columbian pine. There are three varieties: coast Douglas-fir (''P. menziesii'' var. ''menziesii''), Rocky Mountain Douglas-fir (''P. menziesii'' var. ''glauca'') and Mexican Douglas-fir (''P. menziesii'' var. ''lindleyana''). Despite its common names, it is not a true fir (genus ''Abies''), spruce (genus ''Picea''), or pine (genus ''Pinus''). It is also not a hemlock; the genus name ''Pseudotsuga'' means "false hemlock". Description Douglas-firs are medium-size to extremely large evergreen trees, tall (although only ''Pseudotsuga menziesii var. menziesii'', common name coast Douglas-firs, reach heights near 100 m) and commonly reach in diameter, although trees with diameters of almost exist. The largest coast Douglas-firs regularly live over 500 years, with the olde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles-François Brisseau De Mirbel
Charles-François Brisseau de Mirbel (27 March 1776 – 12 September 1854) was a French botanist and politician. He was a founder of the science of plant cytology. A native Parisian, at the age of twenty, he became an assistant-naturalist with the French National Museum of Natural History. While there he began to examine plant tissue under a microscope. In 1802, Mirbel published his treatise ''Traité d'anatomie et de physiologie végétale'' which established his position as a founder of cytology, plant histology and plant physiology in France. He proposed that all plant tissue is modified from parenchyma (supporting tissue). His observation, in 1809, that each plant cell is contained in a continuous membrane, remains a central contribution to cytology. In 1803, Mirbel obtained the post of superintendent of the gardens of Napoleon's Château de Malmaison. There he studied and published on structure of plant tissue and the development of plant organs. He also studied and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
