Nearly all taxa in Calystegia intergrade geographically into neighboring taxa with the exception of the widespread coastal species, C. soldanella (Linnaeus) R. Brown. It is impossible to draw clearly defined specific limits, and intermediate forms are always found where two taxa approximate geographically[
Calystegia dahurica (Herb.) Choisy
Calystegia sepium dahurica (Herb.) Choisy
Convolvulus dahuricus Herb.
Calystegia pellita is a Pherbaceous perennial plant producing stems 40 - 80cm long, but up to 100cm,from a wide-spreading, branched rhizomatous rootstock. The stems are prostrate to weakly climbing, sometimes more or less erect[
The plant is sometimes harvested from the wild for local use as a food.
Although no reports of toxicity have been seen for this species, at least some, if not all members of this genus are purgative[
], some caution is advised.
E. Asia - Siberia, ?Mongolia, northern and eastern China, Korea
Grassy places and mountain slopes, sometimes a weed of cultivation; at elevations from 300 - 1,700 metres[
]. Dry, herbaceous slopes, meadows, shrubby thickets, fallow land, sometimes among crops[
Easily grown in ordinary garden soil in a sunny position, but plants are apt to become invasive[
Root - cooked[
Young shoots - cooked[
Seed - sow spring in a cold frame in a free draining compost and only just cover. The seed usually germinates in 1 - 3 months at 15°c[
]. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in a cold frame for at least their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts.
Division in early spring whilst dormant[