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Fiorinia externa, the elongate hemlock scale, was accidentally introduced into North America from Japan and is now established in most parts of the north-eastern U.S. [2] It has become a serious pest of hemlock (Tsuga) and some related conifers from the family Pinaceae. Dense colonies of the scale insect result in yellowing, shedding of leaves ...
This fast-growing plant, with large green leaves and dark berries in the fall, is poisonous and has been known to kill livestock that eat pokeweed growing in pastures. How to avoid toxic plants in ...
The leaves are two- to four-pinnate, finely divided and lacy, overall triangular in shape, up to 50 centimetres (20 inches) long and 40 cm (16 in) broad. [4] Hemlock's flower is small and white; they are loosely clustered and each flower has five petals. [5] A biennial plant, hemlock produces leaves at its base the first year but no flowers. In ...
Poison hemlock is a stout, erect plant with a center stalk and light green stems and fern-like leaves that can grow up to 12 feet tall in Washington state’s temperate climate and rich volcanic ...
Tsuga heterophylla, the western hemlock [2] or western hemlock-spruce, [3] is a species of hemlock native to the northwest coast of North America, with its northwestern limit on the Kenai Peninsula, Alaska, and its southeastern limit in northern Sonoma County, California. [4] [5] The Latin species name means 'variable leaves'. [6]
Elderflower: Its flower blossoms are edible, with leaves that branch off in opposite directions, where hemlock leaves alternate. Cow parsley: Edible, this plant grows shorter than hemlock.
An Eastern Hemlock branch at the Kortright Centre for Conservation. Tsuga canadensis, also known as eastern hemlock, [3] eastern hemlock-spruce, [4] or Canadian hemlock, and in the French-speaking regions of Canada as pruche du Canada, is a coniferous tree native to eastern North America. It is the state tree of Pennsylvania. [5]
Periods of leaf fall often coincide with seasons: winter in the case of cool-climate plants or the dry-season in the case of tropical plants, [19] however there are no deciduous species among tree-like monocotyledonous plants, e.g. palms, yuccas, and dracaenas. The hydrangea hirta is a deciduous woody shrub found in Japan. [citation needed]