According to observations of naturalists and beekeepers.
Where are you?
NECTAR PRODUCTION:
200 kilograms per ha
SOURCE FOR HONEY BEES:
Major
The distribution of Rocky Mountain maple extends from Alaska south to California, Arizona, and New Mexico and east to Alberta, the Black Hills of South Dakota, and Nebraska. Rocky Mountain maple has also been reported in Mexico.
This plant is present in at least 16 states/provinces in this country.
Rocky Mountain maple is a native, deciduous tall shrub or small tree. It often grows 20 to 30 feet (6.1-9.1 m) tall, with crown widths from 10 to 20 feet (3-6 m) wide and a stem diameter up to 12 inches (30.5 cm), though it can reach 40 feet (12.2 m) tall and 2 feet (0.6 m) in diameter. Rocky Mountain maple is usually tall and spindly in closed stands, with a more dense and brushy growth form in open stands. Though it may have a single dominant stem, Rocky Mountain maple most often occurs as a multi-stemmed shrub 5 to 6.5 feet (1.5-2 m) tall.
Rocky Mountain maple has opposite, ascending to erect branches, rounded twigs, and a narrow crown. The bark of Rocky mountain maple is smooth until maturity when fissures develop. Rocky mountain maple has a wide, spreading root system with a combination of deep and lateral woody roots.
Rocky Mountain maple may be monoecious or dioecious. Flowers are borne in loose terminal cymes arising from lateral buds and grow in drooping clusters. The paired seeds are winged samaras. Seeds are 0.16 to 0.2 inch (4-5 mm) long and samaras are 0.08 to 0.12 inch (20-30 mm) long.
Bud swell of Rocky Mountain maple occurs from late March through April, with budburst occurring in early April to mid-May. Leafing out occurs between mid-April and late May, with leaf growth occurring into late June. Stem elongation begins in late April and continues to late August. Rocky Mountain maple flowers from late April to late June. Buds form in early to mid-July. Fruit develops from June through August and ripens from July into October. Seed dispersal begins in September, but seeds may remain on stems as late as February. Foliage coloration extends from early August to early September, and leaf fall lasts from early August to mid-November. The timing of foliage coloration and leaf fall of Rocky Mountain maple may be related to moisture availability.
Celtis laevigata (aka: Hackberry, Sugarberry, Lowland hackberry, Sugar hackberry, Arizona sugarberry, Netleaf hackberry, Small's hackberry, Southern hackberry, Texas sugarberry)
Acer negundo (aka: Boxelder, Western boxelder, Arizona boxelder, California boxelder, Texas boxelder, Interior boxelder, Violet boxelder)
Acer glabrum (aka: Rocky Mountain maple, Douglas maple, Greene's maple, New Mexico maple, Torrey maple)
Salix lucida (aka: Shining willow, Greenleaf willow, Tail-leaf willow, Whiplash willow, Pacific willow, Lance-leaf willow, Longleaf willow, Red willow, Western shining willow)
Salix exigua (aka: Narrowleaf willow, Coyote willow)
Prunus americana (aka: American plum, Goose plum, River plum, Wild plum)
Malus coronaria (aka: Sweet crab apple, Garland crab, Alabama crab, Allegheny crab, American crab, Baltimore crab apple, Buncombe crab, Dawson crab, Dunbar crab, Fragrant crab, Garland tree, Lanceleaf crab apple, Missouri crab, Sweet-scented crab, Sweet wild crab, Wild crab, Wild sweet crab, Wild Crab Apple)
Crataegus douglasii (aka: Black hawthorn, Douglas hawthorn, River hawthorn, Western thornapple)
Prunus emarginata (aka: Bitter cherry)
Prunus pumila (aka: Sandcherry, Western sandcherry, Eastern sandcherry, Great Lakes sandcherry)
Salix scouleriana (aka: Scouler's willow, Upland willow)
Salix discolor (aka: Pussy willow, American pussy willow, Glaucous willow, Large pussy willow)
Celtis occidentalis (aka: Common hackberry, Bastard elm, Nettle-tree, Northern hackberry)
Malus domestica (aka: Pyrus pumila, Malus pumila, Apple)
Salix drummondiana (aka: Drummond's willow, Beautiful willow, Blue willow)
Salix amygdaloides (aka: Peachleaf willow, Peach leaf willow)
Salix boothii (aka: Booth's willow)
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)
Salix lemmonii (aka: Lemmon's willow, Lemmon willow)
Salix planifolia (aka: Diamondleaf willow, Planeleaf willow)
Astragalus (aka: Milkvetch, Locoweed, Goat's-thorn)
Populus tremuloides (aka: Quaking aspen, Trembling aspen, Aspen, American aspen, Mountain aspen, Golden aspen, Trembling poplar, White poplar, Popple, Alamo Blanco)
Rubus laciniatus (aka: Cutleaf blackberry, Evergreen blackberry, Slashed blackberry)
Acer grandidentatum (aka: Bigtooth maple, Canyon maple, Western sugar maple)
Salix monticola (aka: Park willow, Cherry willow, Mountain willow, Serviceberry willow, White willow)
Salix lutea (aka: Yellow willow)
Salix geyeriana (aka: Geyer willow, Silver willow)
Rhus glabra (aka: Smooth sumac, Common sumac, Rocky Mountain sumac, Red sumac, Western sumac, White sumac)
Allium schoenoprasum (aka: Chives)
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 pensylvanica (aka: Pin cherry, Fire cherry, Bird cherry)
Prunus virginiana (aka: Chokecherry, Western chokecherry, Common chokecherry, Black chokecherry)
