According to observations of naturalists and beekeepers.
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Pear trees are native to southern, central and western Europe and grow best in light, deep soils in a mild climate.
The common pear is probably of European origin and has been cultivated since ancient times. The pear was introduced into the New World by Europeans as soon as the colonies were established. Early Spanish missionaries carried the fruit to Mexico and California. In most pear-growing countries of the world outside Asia, by far the most widely grown pear variety is Williams’ Bon Chrétien, known in the United States as Bartlett.
This plant is present in at least 43 states/provinces in this country.
The common pear tree is broad-headed and up to 13 meters (43 feet) high at maturity. The trees are relatively long-lived (50 to 75 years) and may reach considerable size unless carefully trained and pruned. The roundish to oval leathery leaves, somewhat wedge-shaped at their bases, appear about the same time as the flowers, which are about 2.5 cm (1 inch) wide and usually white. Pear flowers are usually white or pink and have five petals and sepals; the bases of the five styles are separated. Pear fruits are generally sweeter and of a softer texture than apples and are distinguished by the presence of hard cells in the flesh, the so-called grit, or stone cells. In general, pear fruits are elongate, being narrow at the stem end and broader at the opposite end. Pears are usually propagated by budding or grafting onto a rootstock, usually of Pyrus communis origin.
The pear blooming before the leaf shoots. Main bloom time: Early spring, Late spring, Mid spring.
Aronia arbutifolia (aka: Red chokeberry)
Pyrus communis (aka: European pear, Common pear)
Acer negundo (aka: Boxelder, Western boxelder, Arizona boxelder, California boxelder, Texas boxelder, Interior boxelder, Violet boxelder)
Salix lucida (aka: Shining willow, Greenleaf willow, Tail-leaf willow, Whiplash willow, Pacific willow, Lance-leaf willow, Longleaf willow, Red willow, Western shining willow)
Amelanchier arborea (aka: Common serviceberry, Downy serviceberry, Juneberry, Shadbush, Shadblow, Sugarplum)
Acer saccharum (aka: Sugar maple, Rock maple, Hard maple)
Prunus cerasus (aka: Sour cherry, Tart cherry, Dwarf cherry, Montmorency cherry)
Populus tremuloides (aka: Quaking aspen, Trembling aspen, Aspen, American aspen, Mountain aspen, Golden aspen, Trembling poplar, White poplar, Popple, Alamo Blanco)
Salix bebbiana (aka: Bebb willow, Beak willow, Beaked willow, Long-beaked willow, Diamond willow, Chaton, Petit Minou, Smooth Bebb willow)
Acer rubrum (aka: Red maple, Scarlet maple)
Ulmus americana (aka: American elm, White elm, Water elm, Soft elm, Florida elm)
Malus domestica (aka: Pyrus pumila, Malus pumila, Apple)
Acer platanoides (aka: Norway maple)
Catalpa speciosa (aka: Northern catalpa, Hardy catalpa, Western catalpa, Cigar tree, Catawba-tree, Bois chavanon)
Acer pensylvanicum (aka: Striped maple, Moosewood, Goosefoot maple, Whistlewood)
Rubus canadensis (aka: Smooth blackberry, Thornless blackberry, Canadian blackberry, Smooth highbush blackberry)
Robinia pseudoacacia (aka: Black locust, False acacia, Yellow locust, White locust, Green locust, Post locust, Falsa acacia, Robinia)
Ajuga reptans (aka: Bugle, Blue bugle, Bugleherb, Bugleweed, Carpetweed, Carpet bugleweed, Common bugle, St. Lawrence plant)
Acer spicatum (aka: Mountain maple, Low maple, Moose maple, Water maple, Plaine batarde, Fouereux)
Astragalus (aka: Milkvetch, Locoweed, Goat's-thorn)
Brassica napus (aka: Rapeseed)
Allium schoenoprasum (aka: Chives)
Sinapis arvensis (aka: Charlock mustard, California rape, Charlock, Corn mustard, Canola, Kaber mustard, Rapeseed mustard)
Aronia melanocarpa (aka: Black chokeberry, Rowan, Mountain Ash, Sorbus)
Prunus serotina (aka: Black cherry, Wild black cherry, Rum cherry, Mountain black cherry, Wild cherry)
Prunus pensylvanica (aka: Pin cherry, Fire cherry, Bird cherry)
Calendula officinalis (aka: Marigold, Calendula, Pot marigold, English marigold)
Rhamnus cathartica (aka: Common buckthorn, European buckthorn, Dahurian buckthorn)
