Origin and development of primary vascular tissues in seed plants

摘要: In conclusion it seems appropriate to indicate some of the basic concepts that have determined writer’s approach in present evaluation terms, and interpretations. Morphological categories terms are tools we need describe our observations. If these conceived narrowly on basis a static picture plant structure, if, addition, they used injudiciously, become obstructions stand between us facts revealed by pure observation. At their best, inadequate express fully common tendency living organisms intergrade structure function with other related produce, within themselves, transitional types different cells, tissues or organs. But tools, require language observations, wish this be uniform clearly understood. view nature subject, concepts, must broadly an emphasis dynamic aspects organization plants. Living not conglomerations separable parts, merely cell networks, but aggregations elements intimately associated adjacent them time space.