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The species was first described by Linnaeus in 1753 in his book Species Plantarum [1] There are six recognized subspecies, originally named by Tolken, [2] as follows: . C. tetragona subsp. acutifolia, stems decumbent, rooting at internodes, and sharply acute leaf apices.
They are green to yellowish, hairless, and leathery and somewhat waxy in texture. It is a dioecious species, with male and female structures on separate plants. The male cone is brown with spiralling scales and measures 5 to 15 mm (0.20 to 0.59 in) long by 3 mm (1 ⁄ 8 in) wide. It grows from the leaf axils.
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 ...
Leaves of most plants include a flat structure called the blade or lamina supported by a network of veins, a petiole and a leaf base; [1] but not all leaves are flat, some are cylindrical. [ citation needed ] Leaves may be simple, with a single leaf blade, or compound, with several leaflets .
Larix laricina, commonly known as the tamarack, [3] hackmatack, [3] eastern larch, [3] black larch, [3] red larch, [3] or American larch, [3] is a species of larch native to Canada, from eastern Yukon and Inuvik, Northwest Territories east to Newfoundland, and also south into the upper northeastern United States from Minnesota to Cranesville Swamp, West Virginia; there is also an isolated ...
Cedrus atlantica foliage and mature female cone Male cones beginning to shed pollen. Fully grown, Atlas cedar is a large coniferous evergreen tree, 30 to 35 m (98 to 115 ft) (rarely 40 m) tall, with a trunk diameter of 1.5 to 2 m (4.9 to 6.6 ft).
Dendrolycopodium obscurum, synonym Lycopodium obscurum, commonly called rare clubmoss, [2] ground pine, [3] or princess pine, [4] is a North American species of clubmoss in the family Lycopodiaceae. [5] It is a close relative of other species such as D. dendroideum and D. hickeyi, also treelike.
P. macrophyllus seed cones with two seeds. It is a small to medium-sized evergreen tree, reaching 20 m (66 ft) tall. [4] The leaves are strap-shaped, 6–12 cm (2.4–4.7 in) long, and about 1 cm broad, with a central midrib.