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Conifers are the largest and economically most important component group of gymnosperms, but nevertheless they comprise only one of the four groups. The division Pinophyta consists of just one class, Pinopsida, which includes both living and fossil taxa. Subdivision of the living conifers into two or more orders has been proposed from time to time.
In most of the genera, two to ten or more scales are fused together into a usually swollen, brightly coloured, soft, edible fleshy aril. Usually, only one or two scales at the apex of the cone are fertile, each bearing a single wingless seed, but in Saxegothaea several scales may be fertile. The fleshy scale complex is 0.5–3 cm long, and the ...
A pine is any conifer tree or shrub in the genus Pinus (/ ˈ p aɪ n ə s /) [2] of the family Pinaceae. Pinus is the sole genus in the subfamily Pinoideae.. World Flora Online accepts 134 species-rank taxa (119 species and 15 nothospecies) of pines as current, with additional synonyms, [3] and Plants of the World Online 126 species-rank taxa (113 species and 13 nothospecies), [4] making it ...
Unusually for a pine, the cones normally point forward along the branch, sometimes curling around it. That is an easy way to tell it apart from the similar lodgepole pine in more western areas of North America. The cones on many mature trees are serotinous. They open when exposed to intense heat, greater than or equal to 50 °C (122 °F). [16]
The two-volume, illustrated encyclopedia is a complete reference book covering all recognised conifer cultivars and species, both hardy and tropical. The 1,500-page work features names, synonyms, and brief descriptions, as well as information about height and spread after 10 years, where known, for over 8,000 cultivars and all 615 conifer ...
Podocarpus (/ ˌ p oʊ d ə ˈ k ɑːr p ə s / [2]) is a genus of conifers, the most numerous and widely distributed of the podocarp family, the Podocarpaceae. Podocarpus species are evergreen shrubs or trees, usually from 1 to 25 m (3 to 82 ft) tall, known to reach 40 m (130 ft) at times.
Apart from two species in the yew family, all are in either the pine family (including firs, larches, spruces, pines, Douglas firs and hemlocks) or the cypress family (including junipers, redwoods, giant sequoias, bald cypresses and four genera of cedars). [2] [6] [7] [b] Softwood from North American conifers has a variety of commercial uses.
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 .