Helianthemum canadense (L.) Michx.
Longbranch frostweed
Kingdom Plantae Plants, but not fungi, lichens, or algae
Subkingdom Tracheobionta Vascular plants—plants with a “circulatory system” for delivering water and nutrients
Division Magnoliophyta Flowering plants, also known as angiosperms
Class Magnoliopsida Dicotyledons—plants with two initial seed leaves
Subclass Rosidae Roses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
Order Malvales Includes cacao, balsa, lime, linden, basswood, daphnes, hibiscus, hollyhocks, okra, baobab, cotton, kapok, and many others
Family Cistaceae
Genus Helianthemum From the Greek helios , “sun,” and anthemon , “flower,” because the flowers open only in the sun
Species canadense “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
5/25/2010 · Nashua River Rail Trail, Ayer, Massachusetts · ≈ 6 × 9″ (15 × 23 cm) ID is uncertain
6/1/2012 · Pearl Hill State Park, Townsend, Massachusetts · ≈ 7 × 4½″ (17 × 11 cm)
5/25/2010 · Nashua River Rail Trail, Ayer, Massachusetts · ≈ 8 × 5″ (19 × 13 cm) ID is uncertain
6/2/2016 · Townsend Wildlife Management Are, Townsend, Massachusetts
Older scientific or horticultural names
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.
6/2/2016 · Townsend Wildlife Management Are, Townsend, Massachusetts
6/1/2012 · Pearl Hill State Park, Townsend, Massachusetts · ≈ 8 × 5″ (19 × 13 cm)
6/1/2012 · Pearl Hill State Park, Townsend, Massachusetts · ≈ 7 × 4½″ (17 × 11 cm)
6/22/2010 · Nashua River Rail Trail, Ayer, Massachusetts · ≈ 7 × 4½″ (17 × 11 cm)
6/2/2016 · Townsend Wildlife Management Are, Townsend, Massachusetts
6/21/2017 · Pearl Hill State Park, Townsend, Massachusetts · ≈ 4½ × 7″ (12 × 18 cm)
6/2/2016 · Townsend Wildlife Management Are, Townsend, Massachusetts
Range:
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