TICKSEED SUNFLOWER
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| File Size: 57 KB |
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Bidens aristosa (Michx. ) Britton
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| [=Bidens polylepis S.F. Blake] |
| Riley County, Kansas |
| Annual |
| Height: 1-4 feet |
| Family: Asteraceae - Sunflower Family |
| Flowering Period: July, August, September |
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| Also Called: | | Coreopsis begger-ticks. | | Stems: | | Erect, often much-branched, glabrous. | | Leaves: | | Opposite, simple, short-stalked, 3 to 6 inches long, 1-2 times pinnately divided; segments 5-7, linear-lanceolate, narrow; margins toothed. | | Inflorescences: | | Heads, numerous, 1 to 2 inches wide, on slender stalks; outer bracts 12-30, linear-lanceolate, to 1 inch long, curling or bending downward, margins conspicuously bristle-fringed; inner bracts lanceolate, about equal to disk. | | Flowers: | | Ray florets generally 8, golden yellow, to 1 inch long; disk florets 5-lobed, yellow with purplish brown anthers; chaffy bracts slender, taller than disk florets. | | Fruits: | | Achenes, egg-shaped, flat, hairy, dark brown, tipped with 2 short teeth or bristles, enclosing small seed. | | Habitat: | | Moist prairies, damp lowlands, open marshy sites, ditches, and stream banks. | | Distribution: | | East 1/3 of Kansas. |
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| Tickseed sunflower |  | | 148 KB | | Riley County, Kansas |
| | Tickseed sunflower bracts |  | | 68 KB | | Riley County, Kansas |
| | Tickseed sunflower |  | | 66 KB | | Douglas County, Kansas |
| | Tickseed sunflower |  | | 147 KB | | Douglas County, Kansas |
| | Tickseed sunflower |  | | 198 KB | | Douglas County, Kansas |
| | Tickseed sunflower leaves |  | | 63 KB | | Douglas County, Kansas |
| | Tickseed sunflower |  | | 92 KB | | Linn County, Kansas |
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