According to observations of naturalists and beekeepers.
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Pin cherry occurs from Newfoundland and southern Labrador west across Canada to British Columbia and southern Northwest Territories. It is widespread in New England and the Lake States; south of Pennsylvania, it occurs only in the Appalachian Mountains to northern Georgia and eastern Tennessee. Scattered stands are also found in the Rocky Mountains, south to Colorado and southeast to the Black Hills of South Dakota.
This plant is present in at least 41 states/provinces in this country.
Pin cherry is a shrub or small tree. It generally has a straight trunk and a narrow, round-topped crown, though it may form thickets. Branches, at first ascending, become more or less horizontal and spreading with age. Pin cherry generally grows 15 to 50 feet (5-15 m) tall and 4 to 20 inches (10-51 cm) in diameter. However, trees up to 100 feet tall (30 m) have been found in the southern Appalachians, with the largest size attained on western slopes of the Great Smoky Mountains. In western North America, pin cherry may be generally smaller with an arching shrub form, growing 5 to 15 feet (1.5-4.5 m) tall and spreading 5 to10 feet (1.5-3 m).
Pin cherry has thin foliage, with leaves 1.5 to 4.3 inches (4-11 cm) long and 0.5 to 1.75 inches (1-4.5 cm) wide. Flowers grow in small clusters of 5 to 7 with individual flowers 0.4 inches (1 cm) across. Fruit are drupes 0.15 to 0.3 inch (4-8 mm) across with 1 large seed. Seeds are 0.15 to 0.24 inch (4-6 mm) in diameter with a thick seed coat. There are 13,600 to 22,700 seeds per pound (30,000-50,000 seeds/kg).
Pin cherry has a shallow root system.
Pin cherry is short-lived, maturing rapidly and dying off at 20 to 40 years.
Flower buds form in August or September and flowers bloom with the expanding leaves from late March through June. Fruit matures from July to September and may persist on trees through the autumn. Seed dispersal occurs from July into the winter months.
Salix lucida (aka: Shining willow, Greenleaf willow, Tail-leaf willow, Whiplash willow, Pacific willow, Lance-leaf willow, Longleaf willow, Red willow, Western shining willow)
Prunus pumila (aka: Sandcherry, Western sandcherry, Eastern sandcherry, Great Lakes sandcherry)
Astragalus (aka: Milkvetch, Locoweed, Goat's-thorn)
Robinia pseudoacacia (aka: Black locust, False acacia, Yellow locust, White locust, Green locust, Post locust, Falsa acacia, Robinia)
Rhamnus cathartica (aka: Common buckthorn, European buckthorn, Dahurian buckthorn)
Sinapis arvensis (aka: Charlock mustard, California rape, Charlock, Corn mustard, Canola, Kaber mustard, Rapeseed mustard)
Gleditsia triacanthos (aka: Honey locust, Honey shucks locust, Common honeylocust, Sweet bean locust)
Prunus serotina (aka: Black cherry, Wild black cherry, Rum cherry, Mountain black cherry, Wild cherry)
Prunus pensylvanica (aka: Pin cherry, Fire cherry, Bird cherry)
Tilia americana (aka: American basswood, Basswood, Linden)
Rubus idaeus (aka: Raspberry, Black-haired red raspberry, Brilliant red raspberry, American red raspberry, Red raspberry, Smoothleaf red raspberry, Wild raspberry, Wild red raspberry, Grayleaf raspberry)
Amorpha fruticosa (aka: Desert false indigo, False indigo-bush, Bastard indigobush, Indigo Bush)
Asclepias syriaca (aka: Сommon milkweed, Butterfly flower, Silkweed, Silky swallow-wort, Virginia silkweed)
Brassica rapa (aka: Field mustard, Common mustard, Wild mustard, Wild turnip, Forage turnip, Wild rutabaga, Birdsrape mustard, Rape mustard)
Cirsium arvense (aka: Creeping Thistle, Canada thistle, Field thistle, California thistle, Lettuce from hell thistle, Corn thistle, Cursed thistle, Green thistle, Hard thistle, Perennial thistle, Prickly thistle, Small-flowered thistle, Way thistle, Stinger-needles)
Agastache foeniculum (aka: Giant hyssop, Blue giant hyssop, Anise hyssop, Fragrant giant hyssop, Lavender giant hyssop)
Borago officinalis (aka: Borage, Starflower, Common borage, Cool-tankard, Tailwort)
Prunus virginiana (aka: Chokecherry, Western chokecherry, Common chokecherry, Black chokecherry)
Diervilla lonicera (aka: Northern bush honeysuckle, Bush-honeysuckle, Dwarf bush-honeysuckle, Herbe bleue)