According to observations of naturalists and beekeepers.
Where are you?
200 kilograms per ha
SOURCE FOR HONEY BEES:
Norway maple is native to continental Europe and western Asia. It was introduced to the United States in the mid- to late 1700s in eastern Pennsylvania. A current, accurate description of Norway maple distribution in North America is problematic. It is widely planted throughout much of North America, especially along urban streets and in yards. In many areas, it escapes into the surrounding forest and woodlands, where it may become invasive. Precise distribution information for Norway maple is lacking.
Based on floras and other literature, herbarium samples, and confirmed observations, Norway maple can potentially be found in North America, growing outside cultivation, in the following areas: from New Brunswick and Cape Breton Island west to Minnesota and south to Tennessee and North Carolina. In the West, it is found in British Columbia, Washington, Idaho, and western Montana.
This plant is present in at least 33 states/provinces in this country.
Norway maple is a nonnative tree, usually 40 to 98 feet (12-30 m) in height, with widely spreading, ascending branches. In Europe, Norway maple trees typically grow to a maximum diameter at breast height of 76 inches (190 cm) and live to 150 years. Bark on older trees becomes furrowed.
Flower: Regular (actinomorphic), yellowish-green, approx. 10 mm (0.4 in.) across. Sepals 5, free, triangular, alternating with petals. Petals 5, free, elliptic. Flowers bi- or unisexual. Receptacle nectar-secreting. Stamens 8. Pistil formed from 2 fused carpels. Inflorescence an approx. 20-flowered corymb.
Leaves: Opposite, lacking stipules. Blade palmately lobed with 5 to 7 lobes. Points of lobes long-tapered. Stalk approx. 10 cm (4 in.) long, containing latex. Autumn color varies from deep scarlet to orange and yellow.
Fruits of Norway maple are 2-winged samaras and each half of the fruit is typically 1.4 to 2.2 inches (3.5-5.5 cm) long.
Reproductive buds are formed during summer, overwinter, and open in spring when triggered by warm temperatures. Flowering dates vary geographically, ranging from late April to early June in eastern North America.
Salix arbusculoides (aka: Littletree willow)
Salix bebbiana (aka: Bebb willow, Beak willow, Beaked willow, Long-beaked willow, Diamond willow, Chaton, Petit Minou, Smooth Bebb willow)
Salix geyeriana (aka: Geyer willow, Silver willow)
Rhus glabra (aka: Smooth sumac, Common sumac, Rocky Mountain sumac, Red sumac, Western sumac, White sumac)
Salix richardsonii (aka: Richardson's willow, Woolly willow)
Allium schoenoprasum (aka: Chives)
Brassica napus (aka: Rapeseed)
Sinapis arvensis (aka: Charlock mustard, California rape, Charlock, Corn mustard, Canola, Kaber mustard, Rapeseed mustard)
Calendula officinalis (aka: Marigold, Calendula, Pot marigold, English marigold)
Rubus armeniacus (aka: Himalayan blackberry, Rubus discolor, Rubus procerus)
Brassica rapa (aka: Field mustard, Common mustard, Wild mustard, Wild turnip, Forage turnip, Wild rutabaga, Birdsrape mustard, Rape mustard)
Echium vulgare (aka: Viper's bugloss, Blueweed, Blue thistle)
Chamaenerion angustifolium (aka: Fireweed, Great willowherb, Rosebay willowherb, Saint Anthony's Laurel, French-willow)
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)
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)
Calluna vulgaris (aka: Heather, Scotch heather, Common heather, Ling, Simply heather)
Asteraceae (aka: Aster, Daisy, Composite)