DOI: 10.2307/3514848
关键词: Woodland 、 Vegetation 、 Lichen 、 Salt marsh 、 Ecology 、 Devonian 、 Paleosol 、 Swamp 、 Geology 、 Habit (biology)
摘要: The phrase «plant formation» denotes the structure, growth habit and general appearance of vegetation, regardless its exact taxonomic composition. Plant formations such as heath woodland can now be recognized from fossil records both plants soils. There is a problem, however, with some kinds polar desert vegetation geologically early plant on well drained These consist thalloid only rhizoids, or slender rhizomes, runners fibrous roots, even in non-peaty non-waterlogged term «polsterland» has been proposed for soils dominated by lichens lacking true roots