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;Common names: <small>Butterfly Weed, Canada Root, Chigger Flower, Chiggerflower, Fluxroot, Indian Paintbrush, Indian Posy, Orange Milkweed, Orange Swallow-wort, Pleurisy Root, Silky Swallow-wort, Tuber Root, Yellow Milkweed, White-root, Windroot</small> '''Butterfly weed''' (''Asclepias tuberosa'') is a species of [[milkweed]] native to eastern [[North America]]. It is a [[perennial plant]] growing to 0.6-2 m (1 -2 feet) tall, with clustered orange or yellow [[flower]]s from early summer to early fall. The [[leaf|leaves]] are spirally arranged, lanceolate, 5-12 cm long and 2-3 cm broad. This plant favors dry, sand or gravel soil, but has also been reported on stream margins. It requires full sun. The common name comes from the [[butterfly|butterflies]] that are attracted to the plant by its color and its copious production of [[nectar]]. Butterfly weed is also the [[larva]]l food plant of the [[Queen (butterfly)|Queen]] and [[Monarch (butterfly)|Monarch]] butterflies. The butterfly weed grows to be 1-3 feet long. The plant looks similar to the [[Lanceolate milkweed]] (''Asclepias lanceolata''), but is uniquely identified by the larger number of flowers, and the hairy stems that are not milky when broken. It is most commonly found in fields with dry soil. {{Inc| Asclepias tuberosa, Linn. Butterfly-weed. Pleurisy Root. Hairy, 2-3 ft. high, from long, horizontal roots, with more or less alternate, lance-oblong or lance-linear Lvs.: umbels several, short-peduncled: pods pubescent, erect. Dry banks and fields; widespread, and not infrequent. —A handsome plant. }} ==Cultivation== <!--- Type cultivation info below this line, then delete this entire line --> ===Propagation=== Butterfly weed is easily propagated by cuttings in water. ===Pests and diseases=== <!--- Type pest/disease info below this line, then delete this entire line --> ==Species== Subspecies indicated: *''Asclepias tuberosa interior'', Central United States. *''Asclepias tuberosa rolfsii'' (Rolfs Milkweed), Southeast United States. *''Asclepias tuberosa tuberosa'', Eastern United States. ==Gallery== <gallery> Image:Butterfly Weed Whole Flowering Plant 1676px.jpg|Entire plant from the ground to the flower Image:Butterfly Weed Asclepias tuberosa Young Plant 1938px.JPG|Young stems during spring Image:Butterfly Weed Asclepias tuberosa Young Leaf 3008px.jpg|A young leaf Image:Butterfly Weed Asclepias tuberosa Flower Buds 3008px.jpg|An emerging flower head Image:Butterfly Weed Asclepias tuberosa Stalk Closeup 3008px.JPG|Closeup of the hairy stems Image:Butterfly Weed Asclepias tuberosa Bud Closeup 2816px.JPG|Closeup of unopened buds Image:Butterfly Weed Entire Flower Head 2608px.jpg|Flower head Image:Butteryfly Weed 3 Stages of Bloom 2240px.jpg|Closeup showing unopened, opening, and fully opened flower buds File:Butterfly Weed Asclepias tuberosa Umbel.jpg|Orange flowers File:Butterfly Weed Asclepias tuberosa Striped.jpg|Red-striped orange flowers File:Butterfly Weed Asclepias tuberosa Yellow.jpg|Yellow flowers </gallery> ==References== <references/> *[[Standard Cyclopedia of Horticulture]], by L. H. Bailey, MacMillan Co., 1963 <!--- xxxxx *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381 --> <!--- xxxxx *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432 --> <!--- xxxxx *Sunset National Garden Book. Sunset Books, Inc., 1997. ISBN 0376038608 --> ==External links== *{{wplink}} {{stub}} __NOTOC__
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