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Helianthemum canadense (L.) Michx.

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
GenusHelianthemumFrom the Greek helios, “sun,” and anthemon, “flower,” because the flowers open only in the sun
Speciescanadense“Of or from Canada”

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:

The University of Wisconsin's Robert W. Freckmann Herbarium

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

Www.pbase.com

The Lady Bird Johnson Wildflower Center

Helianthemum canadense (longbranch frostweed)

5/25/2010 · Nashua River Rail Trail, Ayer, Mass­a­chu­setts · ≈ 6 × 9″ (15 × 23 cm) ID is uncertain

Helianthemum canadense (longbranch frostweed)

6/1/2012 · Pearl Hill State Park, Townsend, Mass­a­chu­setts · ≈ 7 × 4½″ (17 × 11 cm)

Helianthemum canadense (longbranch frostweed)

5/25/2010 · Nashua River Rail Trail, Ayer, Mass­a­chu­setts · ≈ 8 × 5″ (19 × 13 cm) ID is uncertain

Helianthemum canadense (longbranch frostweed)

6/2/2016 · Townsend Wildlife Management Are, Townsend, Mass­a­chu­setts

Crocanthemum canadense (L.) Britton

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

 

Helianthemum canadense description by Thomas H. Kent, last updated 25 May 2020.

© FloraFinder.org. All rights reserved.


 

Helianthemum canadense (longbranch frostweed)

6/2/2016 · Townsend Wildlife Management Are, Townsend, Mass­a­chu­setts

Helianthemum canadense (longbranch frostweed)

6/1/2012 · Pearl Hill State Park, Townsend, Mass­a­chu­setts · ≈ 8 × 5″ (19 × 13 cm)

Helianthemum canadense (longbranch frostweed)

6/1/2012 · Pearl Hill State Park, Townsend, Mass­a­chu­setts · ≈ 7 × 4½″ (17 × 11 cm)

Helianthemum canadense (longbranch frostweed)

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

Helianthemum canadense (longbranch frostweed)

6/2/2016 · Townsend Wildlife Management Are, Townsend, Mass­a­chu­setts

Helianthemum canadense (longbranch frostweed)

6/21/2017 · Pearl Hill State Park, Townsend, Mass­a­chu­setts · ≈ 4½ × 7″ (12 × 18 cm)

Helianthemum canadense (longbranch frostweed)

6/2/2016 · Townsend Wildlife Management Are, Townsend, Mass­a­chu­setts

Range:

About this map...