According to observations of naturalists and beekeepers.
Where are you?
This plant is present in at least 6 states/provinces in this country.
Richardson's willow is an erect, much-branched shrub usually forming dense clumps 3 to 6 feet (1-2 m) tall, sometimes to 15 feet (4.5 m). Young twigs are stout and densely hairy; older twigs are glabrous. The bark of Richardson's willow is smooth. Shrubs are composed of light wood that becomes brittle with age; a single trunk rarely survives 60 years. In silty loam containing much organic matter, the roots of Richardson's willow are numerous in the top 7.5 inches (19 cm) of soil, but become less abundant at 9 inches (23 cm). In the frozen ground, roots of Richardson's willow do not exceed 9 inches (23 cm), but as the ground thaws roots will grow up to 17 inches (43 cm) deep.
Richardson's willow flowers from May through July or August. The fruit ripens soon after flowering, followed by seed dispersal in early to midsummer.
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 planifolia (aka: Diamondleaf willow, Planeleaf willow)
Salix pulchra (aka: Tealeaf willow, Flatleaf willow, Flat-leaved willow, Paneleaf willow, Thin red willow)
Astragalus (aka: Milkvetch, Locoweed, Goat's-thorn)
Salix alaxensis (aka: Feltleaf willow, Alaska willow)
Salix richardsonii (aka: Richardson's willow, Woolly willow)
Salix myrtillifolia (aka: Blueberry willow, Low blueberry willow, Tall blueberry willow)
Salix fuscescens (aka: Alaska bog willow)
Salix glauca (aka: Grayleaf willow, Gray willow, Gray-leaved willow)
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)
Chamaenerion angustifolium (aka: Fireweed, Great willowherb, Rosebay willowherb, Saint Anthony's Laurel, French-willow)