Family: Cistaceae
common rock-rose, long-branch frostweed
[Cistus canadensis L., more...]
Robert W. Freckmann
Derek Anderson
Etymology: Helianthemum: from the Greek helios, "sun," and anthemon, "flower," because the flowers open only in the sun
Plants: erect, perennial, 8"-24" tall forb; stems scattered, branching when mature, the branches becoming taller than the main stem
Leaves: alternate, narrowly-oblong, tapering at the base and tip
Flowers: 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.
Habitat: dry; prairies, woods, inland sands
Conservation Status: Native
Plants: erect, perennial, 8"-24" tall forb; stems scattered, branching when mature, the branches becoming taller than the main stem
Leaves: alternate, narrowly-oblong, tapering at the base and tip
Flowers: 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.
Habitat: dry; prairies, woods, inland sands
Conservation Status: Native
Floristic Rating: Coefficient of Conservatism = 6 Atlas of the Wisconsin Prairie and Savanna Flora: by T.S. Cochrane & H.H. Iltis: habitat, distribution infomation / flowering and fruiting times USDA Plants Database: Federal Distribution and detailed information including photos David G. Smith's "Delaware Wilflowers": Beautiful photographs; descriptions Southwest School of Botanical Medicine: Britton & Brown Illustrated Flora - 2nd Edition (1913) "An Illustrated Flora of the Northern United States and Canada"
Derek Anderson
Merel R. Black
Merel R. Black
Kenneth J. Sytsma
Derek Anderson
Derek Anderson
Derek Anderson
Derek Anderson
Derek Anderson
Aaron_Carlson
Aaron_Carlson
Aaron_Carlson
Aaron_Carlson
