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Giant sequoia. Silvics of North America (1991), [1] a forest inventory compiled and published by the United States Forest Service, includes many conifers. [a] It superseded Silvics of Forest Trees of the United States (1965), which was the first extensive American tree inventory. [3]
The Jean Iseli Memorial Grant provides a $4,000 annual grant to a public garden or arboretum that has demonstrated its support of the development, conservation and propagation of conifers. The Society makes annual Reference Garden Grants to assist with development of conifer collections and has begun making Conservation and Research Grants.
Conifers are a group of cone-bearing seed plants, a subset of gymnosperms.Scientifically, they make up the division Pinophyta (/ p ɪ ˈ n ɒ f ɪ t ə, ˈ p aɪ n oʊ f aɪ t ə /), also known as Coniferophyta (/ ˌ k ɒ n ɪ f ə ˈ r ɒ f ɪ t ə,-oʊ f aɪ t ə /) or Coniferae.
'Beehive' – a very small dwarf shrub typically growing to 1 m (3 ft 3 in) high and 1.5 m wide, resembling a spreading beehive in form 'Bennett' – a dwarf shrub reaching 1 m (3 ft 3 in) high and 1.5 m (4 ft 11 in) wide, with upper branchlets that first ascend and then arch upper, this selection prefers partial shade.
Coast Douglas-fir is the fourth tallest conifer and fifth tallest of all trees in the world (after sitka spruce).Currently, coast Douglas-fir trees 60–75 metres (197–246 ft) or more in height and 1.5–2 metres (4.9–6.6 ft) in diameter are common in old growth stands, [4] and maximum heights of 100–120 metres (330–390 ft) and diameters up to 4.5–5.5 metres (15–18 ft) have been ...
The conifers, division Pinophyta, are one of 13 or 14 division level taxa within the Kingdom Plantae. They are cone -bearing seed plants with vascular tissue; all extant conifers are woody plants , the great majority being trees with just a few being shrubs .
The great majority of conifer genera and species are evergreen, retaining their leaves for several (2–40) years before falling, but unusual deciduous conifers occur in five genera (Larix, Pseudolarix, Glyptostrobus, Metasequoia and Taxodium), shedding their leaves in autumn and leafless through the winter.
Pinus mugo, known as dwarf mountain pine, [4] mountain pine, scrub mountain pine, Swiss mountain pine, [5] bog pine, creeping pine, [6] or mugo pine, [7] is a species of conifer, native to high elevation habitats from southwestern to Central Europe and Southeast Europe.