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Bidens sulphurea
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Family:
ASTERACEAE/COMPOSITAE
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Citation: Bidens sulphurea (Cav.) Sch.-Bip. in Seemann, B. Voy. Herald 308. 1856; H.J. Chowdhery in Hajra et al., Fl. India 12: 373. 1995.
Cosmos sulphureus Cav., Ic. 1: 56. t. 79. 1791; Manilal & Sivar., Fl. Calicut 155. 1982; Vajr., Fl. Palghat Dist. 259. 1990.
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Malayalam Name(s):
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Tamil name(s):
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English name(s):
Sulphur Cosmos
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Description:
Herbs, erect, annual, branched upto 1 m high; stems slender, more or less quadrate with large, whitish hairs. Leaves 2-3 pinnatisect; segments acuminate and aristate-tipped, 10-15 cm long, glabrous or with scattered stout hairs; petioles slender, angled, hispid-ciliate at the expanded base. Heads orange, radiate arising at terminal nodes, solitary or few, showy, upto 6 cm across; peduncles slender, apically narrowed, upto 15 cm long with one or more leaf-like bracts. Involucral bracts in 2 series; outer herbaceous, 5-7 mm long; inner membranous, scarious, narrow but broader and longer than the outer bracts. Ray florets few; corolla yellow-orange, obovate, 15-30 mm long, 2-3 denticulate, sparingly pilose. Ovary not fertile. Disc florets many; corolla tubular-cylindrical, 7-12 mm long; apical lobes narrowly obtuse, ciliate on the innerside. Anthers yellow; filament flattened, densely ciliate. Ovary slightly expanded basally, angles with short hairs. Style branches yellow, pilose. Achenes black, compressed, upto 20 mm long, slender, slightly curved, sharply angled, somewhat the upper part narrowed into a linear, ascending strigose beak terminating in 2 stiff, retrorsely strigose bristles, 3 mm long.
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Habit:
Herb
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Flowering & Fruiting:
February-November
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District(s):
All Districts
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Medicinal:
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Habitat:
Cultivated as ornamental, also runs wild
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Distribution:
Native of North America and Africa, introuduced as a garden plant
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Aquatic:
No
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Epiphyte(s):
No
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Saprophyte:
No
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Stem parasite:
No
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Root parasite:
No
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Flower colour(s):
Yellow
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Weed:
No
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Monocot/Dicot:
Dicotyledonous Plants
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Exotic:
Yes
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Garden:
Yes
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Edible:
No
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Vegetable:
No
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Endemic to:
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IUCN status:
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Altitude:
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Localities:
Peechi
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