Frostweed
Frostweed is a common name for several plants and may refer to: *''Helianthemum'' or ''Crocanthemum ''Crocanthemum'' is a genus of flowering plants in the family Cistaceae. They are native to both North and South America where they are widespread. The common name frostweed relates to the ice crystals which form from sap exuding from cracks near ...'' , in the family Cistaceae *'' Verbesina virginica'' in the family Asteraceae {{Short pages monitor ...
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Helianthemum
''Helianthemum'' , known as rock rose, sunrose, rushrose, or frostweed,''Helianthemum''.
Integrated Taxonomic Information System (ITIS). is a of about 110''Helianthemum''.
Flora of China. species of s in the

Crocanthemum
''Crocanthemum'' is a genus of flowering plants in the family Cistaceae. They are native to both North and South America where they are widespread. The common name frostweed relates to the ice crystals which form from sap exuding from cracks near the base of the stem in the late fall. ''Crocanthemum'' are herbaceous perennials or subshrubs with alternate leaves. With the exception of species in California, they generally produce two types of flowers: showy, yellow chasmogamous (cross-pollinated) produced earlier in the growing season, followed by cleistogamous (self-pollinated) flowers that are smaller and lack petals. All species of ''Crocanthemum'' are fire tolerant and are found in open habitats. Although the genus was first named in 1836 to encompass New World species of ''Helianthemum'', it generally went unrecognized by taxonomists and its species were included in a broad concept of ''Helianthemum'' throughout much of the 1800s and 1900s. However, phylogenetic studies in 20 ...
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