milkweed family

milkweed family

noun
the plant family Asclepiadaceae, characterized by herbaceous plants, shrubs, and vines having simple, opposite or whorled leaves, usually milky juice, umbellike clusters of small flowers, and long pods that split open to release tufted, airborne seeds, and including the anglepod, butterfly weed, milkweed, stephanotis, and wax plant.
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Encyclopedia Britannica
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milkweed family

the milkweed family of the flowering-plant order Gentianales, including more than 280 genera and about 2,000 species of tropical herbs or shrubby climbers, rarely shrubs or trees. Most members of the family have milky juice, flowers with five united petals, podlike fruits, and, usually, tufted seeds. The silky-haired seeds are drawn out of their pods by the wind and are carried off. Male and female parts of each flower are united in a single structure. The pollen is massed in bundles called pollinia, pairs of which are linked by a yokelike bar of tissue contributed by the stigma of the pistil. Parts of the pollinia stick to visiting insects, which then carry them to other flowers. In some species the fertility is low, and many-flowered plants often produce few fruits

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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