Ground covers, Perennials, Flowers
Diverse genus of about 2,000 species, ranging from small flowery annuals to sculptural trees. The flower is technically a cyathium, consisting of fused bracts that form a cup around the much-reduced true flowers. Cyathia may appear singly or in clusters. In some cases, as with poinsettia (E. pulcherrima), additional bracts below provide most of the color. The fruit is usually a dry capsule that releases seeds explosively, shooting them up to several feet away. Many euphorbias are succulents; these often mimic cacti in appearance and are as diverse in form and size.
All euphorbias have milky white sap that is irritating on contact or toxic if ingested (degree of irritation or toxicity varies, depending on the species). Before using cut flowers in arrangements, dip stems in boiling water or hold in a flame for a few seconds to prevent sap bleed. All need well-drained soil.
From Europe. Neatly rounded hemisphere to 1 1/2 ft. high, 2 ft. wide, with deep green leaves symmetrically arranged on closely set, hairy stems. From midspring to midsummer, plant is covered with rounded clusters of bright yellow flowers surrounded by whorls of yellow-green bracts. Effect is of a gold mound suffused with green. Displays good fall color (yellow to orange or red) before going dormant. Used in rock gardens and perennial borders. Short-lived but reseeds.
Botanically speaking, violas, pansies, and almost all violets are perennials belonging to the genus
Strong grower to 3–4 ft. tall, about half as wide, with deep purplish pink, orang...
From South America. Grows to 6 in. high and 1 1/2 ft. across. Trailing, branching reddish stems are se...