BLACK-EYED SUSAN
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File Size: 90 KB |
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Rudbeckia hirta L.
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Riley County, Kansas |
Biennial or short-lived perennial |
Height: 1-3 feet |
Family: Asteraceae - Sunflower Family |
Flowering Period: May, June, July, August, September |
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Stems: | | Erect, 1 to several, usually branched, coarsely spreading-hairy. | Leaves: | | Variable, alternate, simple, stalked below to sessile above, oblanceolate to elliptic, to 6 inches long, 1/2 to 2 inches wide, coarsely hairy; margins entire or shallow-toothed; tips mostly blunt; upper leaves lance-linear to oblong, reduced; tips pointed. | Inflorescences: | | Heads, solitary, terminal, on long stalks, hemispheric to egg-shaped, 2 to 3 inches wide; bracts sometimes prominently elongate, stiff-hairy. | Flowers: | | Ray florets 8-21, 1 to 1.5 inch long, orange-yellow; disk florets dark purplish brown. | Fruits: | | Achenes, 4-angled, glabrous, black, without bristles or scales at tips, enclosing small seed. | Habitat: | | Disturbed prairies, waste ground and roadsides. | Distribution: | | Principally east 1/2, sporadically in west of Kansas. | Toxicity: | | Rudbeckia species are thought to be poisonous to livestock. | Comments: | | Black-eyed Susan is a weedy forb, but vigorous stands of native grass limit its spread. |
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Black-eyed Susan ray florets | ![](thumbnails/blackeye5.jpg) | 65 KB | Riley County, Kansas |
| Black-eyed Susan inflorescences | ![](thumbnails/blackeye4.jpg) | 75 KB | Riley County, Kansas |
| Black-eyed Susan disk florets | ![](thumbnails/blackeye6.jpg) | 66 KB | Riley County, Kansas |
| Black-eyed Susan | ![](thumbnails/blackeyes.jpg) | 156 KB | Riley County, Kansas |
| Black-eyed Susan | ![](thumbnails/blackeye9.jpg) | 139 KB | Ellsworth County, Kansas |
| Black-eyed Susan | ![](thumbnails/blackeyedsusan18.jpg) | 63 KB | Cherokee County, Kansas |
| Black-eyed Susan | ![](thumbnails/blackeyedsusan16.jpg) | 116 KB | Cherokee County, Kansas |
| Black-eyed Susan | ![](thumbnails/blackeyedsusan19.jpg) | 191 KB | Cherokee County, Kansas |
| Black-eyed Susan leaves | ![](thumbnails/blackeyedsusan17.jpg) | 78 KB | Cherokee County, Kansas |
| Black-eyed Susan | ![](thumbnails/blackeyedsusan20.jpg) | 65 KB | Cherokee County, Kansas |
| Black-eyed Susan | ![](thumbnails/blackeyedsusan22.jpg) | 152 KB | Shawnee County, Kansas |
| Black-eyed Susan florets | ![](thumbnails/blackeyedsusan30.jpg) | 48 KB | Cherokee County, Kansas |
| Black-eyed Susan | ![](thumbnails/blackeyedsusan36.jpg) | 144 KB | Marshall County, Kansas |
| Black-eyed Susan | ![](thumbnails/blackeyedsusan35.jpg) | 171 KB | Marshall County, Kansas |
| Black-eyed Susan | ![](thumbnails/blackeyedsusanstem.jpg) | 149 KB | Marshall County, Kansas |
| Black-eyed Susan | ![](thumbnails/blackeyedsusan34.jpg) | 224 KB | Marshall County, Kansas |
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