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Genus Calystegia Family Convolvulaceae

Description: Perennial herbs with trailing or twining stems.

Leaves simple, entire, often sagittate or hastate, ± glabrous; hairs simple.

Flowers axillary, solitary or rarely in few-flowered cymes, with large persistent bracteoles ± enclosing the calyx. Sepals 5, free, subequal. Corolla campanulate to funnel-shaped, entire or shallowly 5-lobed, glabrous, with distinct mid-petaline bands. Stamens 5, subequal with short hairs along the basal fused margins of the filaments up to about the point of attachment. Ovary 1- or incompletely 2-locular with 4 ovules, glabrous; style 1, bearing 2 oblong or elliptic stigmatic lobes.

Capsule globose or ovoid, splitting longitudinally into 4 valves.

Distribution and occurrence: World: c. 25 species, mainly temperate regions. Australia: 4 species (3 species native, 1 species naturalized), all States except N.T.

Text by R. W. Johnson
Taxon concept:

Taxa not yet included in identification key
Calystegia affinis

 Key to the species 
1Trailing, rarely weakly twining, plants; leaves rounded, reniformCalystegia soldanella
Twining plants; leaves more or less acute2
2Peduncles longer than petioles; corolla more than 2.5 cm long3
Peduncles not longer than petioles; corolla less than 2.5 cm long
                       Back to 1
Calystegia marginata
3Bracteoles to 15 mm wide, acuteCalystegia sepium
Bracteoles more than 15 mm wide, rounded to emarginate
                       Back to 2
Calystegia silvatica

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