Terms of flowering honey plants in the USA and Canada

According to observations of naturalists and beekeepers.

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Scientific name:

Cirsium arvense

Life form:

Forb, Herb.

Flowering time:

no data.

Flowering period

in District of Columbia for this plant is: Late JuneEarly September.

NECTAR PRODUCTION: 
Minor
 
SOURCE FOR HONEY BEES:
Minor

General distribution:

Cirsium arvense is a perennial species of flowering plant in the family Asteraceae, native throughout Europe and western Asia, northern Africa, and widely introduced elsewhere. The standard English name in its native area is creeping thistle. It is also commonly known as Canada thistle and field thistle.

Cirsium arvense was accidentally introduced to North America in the 1600s and is designated as a noxious weed in 43 states. It occurs from Alaska east to the Northwest Territories, Quebec, and Newfoundland and south to California, New Mexico, Kansas, Arkansas, and North Carolina.

Map of distribution and habitat in USA

This plant is present in at least 54 states/provinces in this country.

See The Map

Botanical description:

Cirsium arvense (Canada thistle) has a deep and wide-spreading root system with a slender taproot and far-creeping lateral roots. It often forms large patches, and individual clones may reach 35 m in diameter. Most Canada thistle roots are in the top 0.2-0.6 m of soil, but roots can extend as deep as 2-6.75 m.

Canada thistle has slender aerial shoots with leafy stems reaching 0.3-2 m tall. Leaves are 3-18 cm long and 0.5-6 cm wide. Canada thistle leaf morphology (texture, hairiness, loving, and spininess) can vary considerably, even within a geographical region. Canada thistle has numerous above-ground branches that bear several, small flowerheads (1-2 cm in diameter) in clusters. Seeds are 2.4-5 mm long, and 1 mm in diameter with a pappus of feathery bristles.

Seasonal development:

Plants develop new roots and underground shoots in January and begin to elongate in February. New shoots from established Canada thistle plants begin to emerge when the average weekly temperature reaches 41 degrees Fahrenheit (5 °C), with optimum emergence after temperatures are at least 46 degrees Fahrenheit (8 °C). Plants remain short until long days trigger flowering and stem elongation, normally in May and June, or about 3 weeks after emergence. When soil is warm and temperatures are moderate (as in fall) Canada thistle grows vigorously.


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List of honey plants that may be blooming now in District of Columbia
See the entire list

Acer saccharinum (aka: Silver maple, Soft maple)

Salix nigra (aka: Black willow, Swamp willow, Southwestern black willow, Gulf black willow, Scythe-leaved willow)

Cercis canadensis (aka: Eastern redbud, Redbud, Cersis Reniformis)

Malus angustifolia (aka: American crab apple, Buncombe crab apple, Crabtree, Narrowleaf crab, Narrowleaf crab apple, Southern crab, Southern crab apple)

Aronia arbutifolia (aka: Red chokeberry)

Ulmus americana (aka: American elm, White elm, Water elm, Soft elm, Florida elm)

Acer rubrum (aka: Red maple, Scarlet maple)

Salix discolor (aka: Pussy willow, American pussy willow, Glaucous willow, Large pussy willow)

Pyrus communis (aka: European pear, Common pear)

Acer negundo (aka: Boxelder, Western boxelder, Arizona boxelder, California boxelder, Texas boxelder, Interior boxelder, Violet boxelder)

Celtis laevigata (aka: Hackberry, Sugarberry, Lowland hackberry, Sugar hackberry, Arizona sugarberry, Netleaf hackberry, Small's hackberry, Southern hackberry, Texas sugarberry)

Salix lucida (aka: Shining willow, Greenleaf willow, Tail-leaf willow, Whiplash willow, Pacific willow, Lance-leaf willow, Longleaf willow, Red willow, Western shining willow)

Malus domestica (aka: Pyrus pumila, Malus pumila, Apple)

Prunus cerasus (aka: Sour cherry, Tart cherry, Dwarf cherry, Montmorency cherry)

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)

Acer saccharum (aka: Sugar maple, Rock maple, Hard maple)

Populus tremuloides (aka: Quaking aspen, Trembling aspen, Aspen, American aspen, Mountain aspen, Golden aspen, Trembling poplar, White poplar, Popple, Alamo Blanco)

Liriodendron tulipifera (aka: Tuliptree, Blue-poplar, Tulip-poplar, Yellow-poplar, Yellow wood)

Prunus pumila (aka: Sandcherry, Western sandcherry, Eastern sandcherry, Great Lakes sandcherry)

Vaccinium corymbosum (aka: Highbush blueberry, High-bush blueberry, Northern highbush blueberry, Tall blueberry, Rabbiteye blueberry, Blue huckleberry, Tall huckleberry, Swamp huckleberry, High blueberry, Swamp blueberry)

Salix bebbiana (aka: Bebb willow, Beak willow, Beaked willow, Long-beaked willow, Diamond willow, Chaton, Petit Minou, Smooth Bebb willow)

Prunus americana (aka: American plum, Goose plum, River plum, Wild plum)

Ilex opaca (aka: American holly, Dune holly, Hummock holly, Scrub holly)

Acer platanoides (aka: Norway maple)