Robert W. Freckmann Herbarium


  Helianthemum canadense (L.) Michx. image
Photographer: Merel R. Black           

Derek Anderson

Kenneth J. Sytsma

Merel R. Black

Robert W. Freckmann
Family Cistaceae
Helianthemum canadense (L.) Michx.
common rock-rose, long-branch frostweed
Helianthemum: from the Greek helios, "sun," and anthemon, "flower," because the flowers open only in the sun
canadense: of or referring to Canada
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: erect, perennial, 8"-24" tall forb; stems scattered, branching when mature, the branches becoming taller than the main stem
Flower: yellow, 5-parted, 2/3"-1 1/8" wide; inflorescence of 1-2 flowers in a branched cluster (cyme) at the top of the stem; blooms May-June, usually 2-3 weeks earlier than H. bicknellii.
Leaf:alternate, narrowly-oblong, tapering at the base and tip
Habitat: dry; prairies, woods, inland sands
Notes: early morning moisture, driven up from the roots, bursts the stems causing a hoarfrost effect.
(Glossary)

More Information Natural Communities Herbarium Specimens
All Helianthemum list Ethnobotany Information Google- Images or Text
Synonyms 
Cistus canadensis L.
Crocanthemum canadense (L.) Britton
Helianthemum canadense (L.) Michx. var. sabulonum Fernald

         
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