''Helianthemum canadense'' or ''Crocanthemum canadense'' (known as longbranch frostweed, Canada frostweed, frostweed, rock frost, frostplant, or frostwort) is a species of
rock-rose (
Cistaceae
The Cistaceae are a small family of plants (rock-rose or rock rose family) known for their beautiful shrubs, which are profusely covered by flowers at the time of blossom. This family consists of about 170(-200) species in nine genera that are ...
), native to eastern
North America
North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...
.
Description
It is a flowering perennial in height that blooms from May to June for a single day. Each stem normally has a single flower, but rarely can have two. The flower is yellow in color, with five petals and is between 3/4 and 1 1/4 inches across. The leaves are covered in hairs and alternate in pattern. The stems are also covered in hairs and are brown or green in color.
References
USDA, NRCS. 2019. The PLANTS Database (http://plants.usda.gov, 5 February 2019). National Plant Data Team, Greensboro, NC 27401-4901 USA.wildflower.orgMinnesotawildflowers.info
canadense
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