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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.
Cedrus, common English name cedar, a genus of coniferous trees in the plant family Pinaceae Cedrus libani, the Lebanon cedar, native to Lebanon, western Syria and south-central Turkey; Cedrus atlantica, the Atlas cedar, native to the Atlas Mountains of Morocco and Algeria; Cedrus deodara, the Deodar cedar, native to the western Himalayas
Pseudolarix is a genus of coniferous trees in the pine family Pinaceae containing three species, the extant Pseudolarix amabilis and the extinct species Pseudolarix japonica and Pseudolarix wehrii. Pseudolarix species are commonly known as golden larch, but are not true larches (Larix) being more closely related to Keteleeria, Abies and Cedrus.
The Pinaceae (/ p ɪ ˈ n eɪ s iː ˌ iː,-s i ˌ aɪ /), or pine family, are conifer trees or shrubs, including many of the well-known conifers of commercial importance such as cedars, firs, hemlocks, piñons, larches, pines and spruces. The family is included in the order Pinales, formerly known as Coniferales.
Larix decidua is a medium-size to large deciduous coniferous tree reaching 25–45 m tall, with a trunk up to 1.5 m diameter (exceptionally, to 53.8 m tall [5] and 11.20 m girth [3.56 m diameter] [6]). The crown is conic when young, becoming broad and often irregular with age; the main branches are level to upswept, with the side branches often ...
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 .
He’s a real conifer-sseur. A visit to the Rockefeller Center Christmas tree — dizzyingly tall, dazzlingly lit — is one of NYC’s most treasured holiday rituals.
Christmas trees are also vulnerable to fungal pathogens and their resultant illnesses such as root rot, and, in the U.S. state of California, sudden oak death. Douglas-fir trees in particular are vulnerable to infections from plant pathogens such as R. pseudotsugae. Larger pests also pose a threat to Christmas tree plantations and harvests.