According to observations of naturalists and beekeepers.
Where are you?
In North America, Halberd willow occurs in northern Alaska, the mountains of central Alaska, including the Alaska Range, and extreme northwestern Canada. It is most common near the Arctic Coast. Halberd willow also occurs in northern Europe and Asia, southward in the mountains of both.
This plant is present in at least 3 states/provinces in this country.
Halberd willow is a native, multibranched, spreading shrub typically between 3 and 6 feet (1-2 m) tall. It has small, simple, alternate, deciduous leaves. Male and female flowers occur on separate plants in 0.75- to 2-inch-long (1.5-5 cm), erect catkins. Halberd willow has a remarkable characteristic of plasticity; its growth form adapts readily to a wide variety of habitats.
Halberd willow flowers in late spring or midsummer (May-June). The fruit ripens soon after flowering, followed by seed dispersal in late July and early August.
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)
Crataegus douglasii (aka: Black hawthorn, Douglas hawthorn, River hawthorn, Western thornapple)
Populus tremuloides (aka: Quaking aspen, Trembling aspen, Aspen, American aspen, Mountain aspen, Golden aspen, Trembling poplar, White poplar, Popple, Alamo Blanco)
Salix scouleriana (aka: Scouler's willow, Upland willow)
Acer circinatum (aka: Vine maple)
Malus fusca (aka: Oregon crab, Oregon crab apple, Pacific crab apple, Western crab apple)
Rubus spectabilis (aka: Salmonberry)
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)