Caltha
Botanical name: Caltha
Caltha
Botanical name: Caltha
Description
Caltha are cold-hardy, flowering perennials with small, often clustered white to bright yellow blooms. The plants contain noxious chemicals that make them unappetizing to wildlife, but their flowers attract a variety of beetles, bees, and hoverflies. The seeds of several species have developed to be spread by water, usually via rainstorms. 
Species of Caltha
Marsh-marigold 'Flore Pleno'
Marsh-marigold 'Flore Pleno' is a winner of the Award of Garden Merit and a double version of the usual marigold. A more manageable and beautiful variety, marsh-marigold 'Flore Pleno' was cultivated as a hybrid and named after the Latin word for "full flower" due to its double blooms. This cultivar is popular for its vibrant and prolific blooms and ease of care.
Marsh-marigold 'Alba'
Marsh-marigold 'Alba' are cold-hardy, flowering perennials with small, often clustered white to bright yellow blooms. The plants contain noxious chemicals that make them unappetizing to wildlife, but their flowers attract a variety of beetles, bees, and hoverflies. The seeds of several species have developed to be spread by water, usually via rainstorms.
Yellow marsh marigold
Yellow marsh marigold (Caltha palustris) is a perennial wildflower that grows from 30 to 91 cm tall. It produces bright yellow buttercup-like blossoms that bloom from spring to summer. It is commonly found growing in moist woodlands and boggy areas. It is a favorite of grazing cows and attracts butterflies and bees. Its seeds can be collected after blooming for replanting in other locations.
Howell's marsh marigold
Howell's marsh marigold is a snowbank flower native to the western parts of North America. This plant always blooms around the time when snow melts and winter ends. Each stalk typically produces only one flower. In spite of the name, howell's marsh marigold is not closely related to true marigolds.
Yellow caltha
Yellow caltha are cold-hardy, flowering perennials with small, often clustered white to bright yellow blooms. The plants contain noxious chemicals that make them unappetizing to wildlife, but their flowers attract a variety of beetles, bees, and hoverflies. The seeds of several species have developed to be spread by water, usually via rainstorms.
White caltha
White caltha are cold-hardy, flowering perennials with small, often clustered white to bright yellow blooms. The plants contain noxious chemicals that make them unappetizing to wildlife, but their flowers attract a variety of beetles, bees, and hoverflies. The seeds of several species have developed to be spread by water, usually via rainstorms.
Caltha leptosepala subsp. howellii
Caltha leptosepala subsp. howellii are cold-hardy, flowering perennials with small, often clustered white to bright yellow blooms. The plants contain noxious chemicals that make them unappetizing to wildlife, but their flowers attract a variety of beetles, bees, and hoverflies. The seeds of several species have developed to be spread by water, usually via rainstorms.
Floating marsh marigold
Floating marsh marigold are cold-hardy, flowering perennials with small, often clustered white to bright yellow blooms. The plants contain noxious chemicals that make them unappetizing to wildlife, but their flowers attract a variety of beetles, bees, and hoverflies. The seeds of several species have developed to be spread by water, usually via rainstorms.
Caltha palustris var. barthei
Yellow flowers stand out.
Alpine marsh-marigold
Alpine marsh-marigold are cold-hardy, flowering perennials with small, often clustered white to bright yellow blooms. The plants contain noxious chemicals that make them unappetizing to wildlife, but their flowers attract a variety of beetles, bees, and hoverflies. The seeds of several species have developed to be spread by water, usually via rainstorms.
Scientific Classification
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