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Calystegia marginata

(Forest Bindweed)

Common Names

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Common Names in English:

Forest Bindweed


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Family Convolvulaceae

Herbs or shrubs , usually with twining or climbing stems or erect , often with milky juice. Leaves alternate, simple , entire, dissected , or compound , absent in parasitic species. Flowers solitary, axillary or in cymes, racemes , panicles, umbels, or capitula, bisexual , actinomorphic , usually 5-merous, often showy. Sepals free , often persistent , sometimes enlarged in fruit. Corolla sympetalous , funnelform , campanulate , salverform , or urceolate ; limb subentire or deeply lobed . Stamens alternating with corolla lobes , adnate to corolla; filaments filiform , equal or unequal in length ; anthers introrse , laterally and longitudinally dehiscing; pollen smooth or finely spiny . Disc ringlike or cupular. Ovary superior, mostly 2-carpellate, 1- or 2-loculed, rarely 3- or 4-loculed; ovules basal, erect. Styles 1 or 2, terminal (gynobasic in Dichondra) or very short or absent; stigma entire or 2- (or 3) -lobed, rarely peltate. Fruit a capsule, dehiscing by valves , circumscissile, or irregularly shattering, less often a berry or nutlike. Seeds usually trigonous , smooth or pubescent .

About 58 genera and 1650 species: widely distributed in tropical , subtropical , and temperate regions ; 20 genera and 129 species in China.

Aniseia biflora (Linnaeus) Choisy and A. stenantha (Dunn) Ling, recognized in the Fl. Reipubl. Popularis Sin., are here treated as Ipomoea biflora and I. fimbriosepala, respectively, because both have pantoporate and spinulose pollen. Strictly speaking, Aniseia is a neotropical genus of about five species, of which A. martinicensis (Jacquin) Choisy is widely naturalized as a common weed in rice paddies in Thailand and other southeast Asian countries. It will probably be found in S China eventually.

The family is important in China for food plants (Ipomoea batatas (Linnaeus) Lamarck and I. aquatica Forsskål), several ornamentals (Ipomoea), several medicinal plants (Erycibe, Ipomoea, Cuscuta, Merremia, Dichondra, Evolvulus), and numerous noxious weeds (Cuscuta, Calystegia, Convolvulus) .

Pollen aperture type and surface ornamentation are important characters in the classification of Convolvulaceae at the generic level and above. The most critical feature of the pollen is whether the grain surface is spiny or not. This distinction separates the eight tribes recognized by Austin (Ann. Missouri Bot. Gard. 60: 306-412. 1973) into two rather cohesive groups. A low magnification (20 ) is adequate for discerning the presence or absence of minute spines on the surface.

For the successful identification of Convolvulaceae, both flowering and fruiting material should be collected. The first key to genera requires adequate fertile material with both flowers and fruit, and requires use of a pollen character. The second key may be used as an aid to identification where material is lacking flowers or fruit, but in some instances it is still partially dependent upon having both flowers and fruit.[1]

Genus Calystegia

Herbs prostrate or erect to twining to several meters tall, rhizomatous [or woody at base ]. Leaves subsessile to petiolate , oblong to hastate or sagittate [or rarely pedate]. Inflorescences axillary , 1-flowered [or few-flowered] cymes; bracteoles 2, sepal-like, inserted immediately below calyx, ovate and sometimes saccate , enclosing calyx [or remote from calyx and subulate or leaf-shaped], persistent . Sepals subequal , persistent. Corolla white, pink [or pale yellow], funnelform , with 5 distinct midpetaline bands , glabrous . Stamens included , equal. Pollen globose , pantoporate , not spiny . Ovary 1-loculed, 4-ovuled. Style 1, included in corolla; stigmas 2, clavate . Capsule globose, glabrous, indehiscent. Seeds 4, smooth or minutely tuberculate .

Approximately 70 intergrading subspecific taxa which can be arbitrarily combined into about 25 species: mostly temperate but sparingly extending to the tropics; six species in China.

Nearly all taxa in Calystegia intergrade geographically into neighboring taxa with the exception of the widespread coastal species, C. soldanella (Linnaeus) R. Brown. Almost half of the genus is endemic in California, U.S.A., and the exceptions noted in the generic description in brackets [ ] all refer to the Californian endemics. It is impossible to draw clearly defined specific limits , and intermediate forms are always found where two taxa approximate geographically.[2]

Physical Description

Flowers: Bloom Period: June, July, August. • Flower Color: near white, white


Size: 36-48" tall.


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Sunlight: Sun Exposure: Sun to Partial Shade.


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Publishing author : R.Br. Publication : Prodromus Florae Novae Hollandiae 1810 (27 Mar. 1810)

Similar Species

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Members of the genus Calystegia

ZipcodeZoo has pages for 67 species, subspecies, varieties, forms, and cultivars in this genus:

C. atriplicifolia (Night-Blooming Bindweed) · C. atriplicifolia subsp. buttensis (Nightblooming False Bindweed) · C. catesbeiana (Catesby's Bindweed) · C. catesbiana (Catesby's False Bindweed) · C. collina (Coast Range Bindweed) · C. collina tridactylosa (Coast Range False Bindweed) · C. collina subsp. oxyphylla (Coast Range False Bindweed) · C. collina subsp. tridactylosa (Coast Range False Bindweed) · C. collina subsp. venusta (Coast Range False Bindweed) · C. hederacea (Japanese False Bindweed) · C. hederacea 'Flore Pleno' (Creeping Verbena) · C. japonica (Calystegia) · C. longipes (Paiute False Bindweed) · C. macounii (Macoun's Bindweed) · C. macrostegia (Island Bindweed) · C. macrostegia arida (Coast Range False Bindweed) · C. macrostegia intermedia (Island False Bindweed) · C. macrostegia macrostegia (Island False Bindweed) · C. macrostegia subsp. amplissima (Island False Bindweed) · C. macrostegia subsp. arida (Island False Bindweed) · C. macrostegia subsp. cyclostegia (Island False Bindweed) · C. macrostegia subsp. intermedia (Island False Bindweed) · C. macrostegia subsp. tenuifolia (Island False Bindweed) · C. malacophylla (Sierra Bindweed) · C. malacophylla (Greene) Munz var. berryi (Eastw.) Brummitt (Berry Morning-Glory) · C. malacophylla pedicellata (Sierra False Bindweed) · C. malacophylla subsp. pedicellata (Sierra False Bindweed) · C. marginata (Forest Bindweed) · C. occidentalis (Chaparral False Bindweed) · C. occidentalis fulcrata (Chaparral False Bindweed) · C. occidentalis occidentalis (Chaparral False Bindweed) · C. occidentalis var. tomentella (Chaparral False Bindweed) · C. occidentalis subsp. fulcrata (Chaparral False Bindweed) · C. peirsonii (Peirson's False Bindweed) · C. pellita (Calystegia) · C. purpurata (Pacific Bindweed) · C. purpurata saxicola (Pacific False Bindweed) · C. purpurata solanensis (Solano False Bindweed) · C. purpurata subsp. saxicola (Pacific False Bindweed) · C. purpurata subsp. solanensis (Solano False Bindweed) · C. sepium (Bearbind) · C. sepium americana (American Bindweed) · C. sepium binghamiae (Bearbind) · C. sepium spectabilis (Wild Morning-Glory) · C. sepium subsp. americana (Hedge False Bindweed) · C. sepium subsp. angulata (Hedge False Bindweed) · C. sepium subsp. appalachiana (Appalachia False Bindweed) · C. sepium subsp. binghamiae (Bingham's False Bindweed) · C. sepium subsp. erratica (Hedge False Bindweed) · C. sepium subsp. limnophila (Hedge False Bindweed) · C. silvatica (Shortstalk False Bindweed) · C. silvatica fraterniflora (Hedge False Bindweed) · C. silvatica silvatica (Shortstalk False Bindweed) · C. silvatica subsp. fraterniflora (Shortstalk False Bindweed) · C. soldanella (Beach Morning Glory) · C. spithamaea (Low Bindweed) · C. spithamaea stans (Low False Bindweed) · C. spithamaea subsp. purshiana (Low False Bindweed) · C. spithamaea subsp. stans (Low False Bindweed) · C. spithamaeus (Upright Bindweed) · C. stans (Low False Bindweed) · C. stebbinsii (Stebbins' False Bindweed) · C. subacaulis (Hill Bindweed) · C. subacaulis episcopalis (Hillside False Bindweed) · C. subacaulis subacaulis (Hillside False Bindweed) · C. subacaulis subsp. episcopalis (Hillside False Bindweed) · C. tuguriorum (Powhiwhi)

More Info

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Further Reading

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Data Sources

Accessed through GBIF Data Portal February 28, 2008:



  1. Ruizheng Fang & George Staples "Convolvulaceae". in Flora of China Vol. 16 Page 271. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at [back]
  2. Fang Rhui-cheng, Richard K. Brummitt "Calystegia". in Flora of China Vol. 16 Page 286. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at [back]
Last Revised: 2014-05-09