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Helianthemum canadense

Helianthemum canadense (L.) Michx.

Crocanthemum canadense (L.) Britton

Helianthemum canadense (L.) Michx. var. sabulonum Fernald

Longbranch Frostweed

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassRosidaeRoses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
OrderMalvalesIncludes cacao, balsa, lime, linden, basswood, daphnes, hibiscus, hollyhocks, okra, baobab, cotton, kapok, and many others
FamilyCistaceae
GenusHelianthemum
Speciescanadense

About plant names...

Helianthemum means roughly “sunflower,” from the Greek Ἥλιος (helios), or sun, and ανθέμιον (anthemion), or flower. These plants are native to North America.

Identification: Plants are 8-24" (20-60 cm) tall, branching from a single stem to multiple branches when mature, with the new branches larger than the original. Leaves are alternate, narrow, tapered at both ends. Flowers are bright yellow, with five overlapping petals, ⅝-1" (1.7-2.9 cm) in diameter. Flowers appear from May to June.

Online References:

Helianthemum canadense at the University of Wisconsin's Robert W. Freckmann Herbarium

Helianthemum canadense on Plants for a Future, a resource and information centre for edible and otherwise useful plants

Helianthemum canadense on www.pbase.com

Helianthemum canadense at the Lady Bird Johnson Wildflower Center

Helianthemum canadense (Longbranch Frostweed)

5/25/2010 · Nashua River Rail Trail, Ayer, MA
≈ 3½ × 6" (9.7 × 15 cm) ID is uncertain

Helianthemum canadense (Longbranch Frostweed)

6/1/2012 · Pearl Hill State Park, Townsend, MA
≈ 4 × 4½" (10 × 11 cm)

Helianthemum canadense (Longbranch Frostweed)

5/25/2010 · Nashua River Rail Trail, Ayer, MA
≈ 2½ × 2½" (6.7 × 6.2 cm) ID is uncertain

Helianthemum canadense (Longbranch Frostweed)

6/2/2016 · Townsend Wildlife Management Area, Townsend, MA

Helianthemum canadense description by Thomas H. Kent, last updated 17 Jun 2016.

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Helianthemum canadense (Longbranch Frostweed)

6/2/2016 · Townsend Wildlife Management Area, Townsend, MA

Helianthemum canadense (Longbranch Frostweed)

6/1/2012 · Pearl Hill State Park, Townsend, MA
≈ 7 × 4½" (16 × 11 cm)

Helianthemum canadense (Longbranch Frostweed)

6/1/2012 · Pearl Hill State Park, Townsend, MA
≈ 4½ × 5" (11 × 12 cm)

Helianthemum canadense (Longbranch Frostweed)

6/22/2010 · Nashua River Rail Trail, Ayer, MA
≈ 7 × 4½" (17 × 11 cm)

Helianthemum canadense (Longbranch Frostweed)

6/2/2016 · Townsend Wildlife Management Area, Townsend, MA

Helianthemum canadense (Longbranch Frostweed)

6/21/2017 · Pearl Hill State Park, Townsend, MA
≈ 3½ × 6" (9.4 × 14 cm)

Helianthemum canadense (Longbranch Frostweed)

6/2/2016 · Townsend Wildlife Management Area, Townsend, MA

Range:

About this map...