— pop out of bed". Several regional subspecies have been described, but they are not considered distinct by all authorities: Calystegia sepium subsp. americana. North America. Calystegia sepium subsp. angulata. North America. Calystegia sepium subsp. appalachiana. Eastern North America. Calystegia sepium subsp. binghamiae. Western North America (California). Calystegia sepium subsp. erratica. North America. Calystegia sepium subsp. limnophila. Southern North America. Calystegia sepium subsp. roseata. Western Europe, coasts. Flowers pink. Calystegia sepium subsp. sepium. Europe, Asia. Calystegia sepium subsp. spectabilis. Siberia. Flowers often pinkish. As a weed While appreciated for its flowers, C. sepium can grow as a vigorous weed plant, and is able to overwhelm and pull down cultivated plants including shrubs and small trees. It is self-seeding (seeds can remain viable as long as 30 years), can rapidly regrow into whole plants from individual pieces such as discarded roots, and the success of its creeping rhizomes (they can be as long as ) cause it to be a persistent weed and have led to its classification in some American states as a noxious weed. C. sepium is highly sensitive to glyphosate, a systemic herbicide, but eradication may require several doses. Similar species Calystegia silvatica, giant bindweed, is sometimes treated as a subspecies of C. sepium Convolvulus arvensis, field bindweed, is a similar vine with much smaller features. The rear margin leaf projections are sharp. The leaves of Ipomoea pandurata, wild potato vine, are shaped like a heart, not like an arrowhead. Gallery References External links Flora Europaea: Calystegia sepium . One of the Flowers of Loveliness for 1838 combining an engraved picture, White Rose and Night Convolvulus, from Eliza Sharpe with a poetical illustration from Letitia Elizabeth Landon. Species Accounts, Botanical Society of Britain and Ireland: Calystegia sepium Oregon State Weed Guide Ohio Perennial & Biennial Weed Guide sepium Flora of North America Flora of Asia Flora of Europe Flora of Western Australia Plants described in 1753 Taxa named by Carl Linnaeus Taxa named by Robert Brown (botanist, born 1773)