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Calystegia sylvatica (Kit.) Griseb.

2414 (3). C. sylvatica (Kit.) Griseb., Spicil. Fl. Rum. Bythin. II (1844) 74; Boiss., Fl. Or. IV (1875) 111; Vel., Fl. Bulg. (1891) 387; Brummitt, Fl. Eur. III (1972) 79; Convolvulus silvaticus Waldst. et Kit., Pl. Rar. Hung. III (1812) 290; Convolvulus silvestris Waldst. et Kit. ex Willd., Enum. PI. Horti Berol (1809) 202 et PI. Rar. Hung. III (1810—11) 290, t. 261; Calystegia sylvestris (Waldst. et Kit. ex Willd.) Roem. et Schultes, Syst. Veget. IV (1819) 183; Hayek, Prodr. Fl. Penins. Balc. II (1928) 41; C. sepium subsp. silvatica (Choisy) Stoj. et Stef., Фл. Бълг. изд. 2 (1933) 824 — Горско чадърче

Fam: Convolvulaceae Vent.
Genus: Calystegia R. BR.
Species: Calystegia sylvatica (Kit.) Griseb.
English Name: Giant bindweed, Large bindweed

Description:

Perennial plant. The rhizome is massive, long, creeping, with underground branches. Stem twisty, thin, up to 2 - 3 (-4) m long, bare, smooth. Leaves of (2-) 3 - 5 (-6) cm long petioles, triangular heart-shaped to ovate, (3,5-) 7 - 10 (-13) cm long and 3 - 6 (-11) cm wide, in base heart-shaped or heart-shaped arrowheads, shares entire or two-lobed, rounded or pointed, naked. The blossoms of (2-) 3 - 5 (-8) cm long petioles, usually exceeding the leaf blades. Bracts 15 - 25 mm long and 14 - 30 (-38) mm wide, rounded ovate to nearly circular, at the base more or less swollen, at the atop rounded to incised or nearly pointed, overlapping, covering almost entirely the calyx. Sepals ovate or ovate lance, acute to blunt, shorter than the bracts, pale green, marginally ciliate, entire. Corolla 5.5 - 9.0 cm long and 5.0 - 6.0 cm in diameter, funnel-shaped, white, rarely pink outside. Stamens much shorter than the corolla, (24-) 28-36 (-40); bases broadly expanded, fibrous; anthers 6 - 8 mm long. Box spherical to conical, short pointed, 1 cm in diameter, bare. Seeds 1.0 - 2.5 mm long, elliptical to spherical, black, glabrous.

From:   „Флора на Н Р България”, том VIII, БАН, София, (1982)

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The morning glory Calystegia silvatica (syn. Calystegia sepium silvatica, C. inflata, and C. sylvestris) is known by the common name giant bindweed orlarge bindweed.[1] It is the largest species of bindweed and is a strong rampant climber.
It is native to southern Europe but has been introduced to many other areas because it is an attractive garden plant. Calystegia silvatica subsp. fraterniflora(Mack. & Bush) Brummitt (short-stalked false bindweed) is native to North America.[2][3]
It has large, arrow-shaped leaves and showy white trumpet-shaped flowers up to 9 centimeters in diameter. It is considered a weed in some areas where it has escaped cultivation and now grows wild. It spreads easily via hardy rhizomes. There are several subspecies.

From Wikipedia, the free encyclopedia

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Flowering Time: Blooms: V - VIII.

Distribution in Bulgaria: Growing in humid coastal forests and shrubs, from grassy places, to gardens and yards, in lowlands and hills. Distributed from sea level up to 1000 m altitude. (Conspectus of the Bulgarian Vascular Flora) = conspectus&gs_l= Zlc.

Distribution: Growing in humid coastal forests and shrubs, from grassy places, to gardens and yards, in lowlands and hills. Distributed from sea level up to 1000 m altitude.

Conservation status and threats: not protected species in Bulgaria by the Biodiversity Law. - Biological Diversity Act - http://eea.government.bg/bg/legislation/biodiversity/zbran_22.08.15.pdf

Medical plant: it is not medical plant - Medicinal Plants Act - http://eea.government.bg/bg/legislation/biodiversity/ZLR_en.pdf

References: „Флора на Н Р България”, том VIII, БАН, София, (1982), Wikipedia, the free encyclopedia

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