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Asteraceae (12)
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 Image: Basionym: Genus Basionym: Notes:

1. Megalodonta beckii var. hendersonii Sherff. Megalodonta beckii var. hendersonii Sherff. one image specimen; one type description (pdf)

2. Cirsium undulatum (Nutt.) Spreng. var. ciliolatum Hend. Cirsium undulatum (Nutt.) Spreng. var. ciliolatum Hend.

3. Cirsium howellii Petrak Cirsium howellii Petrak

4. Senecio howellii Greenman Senecio howellii Greenman Senecio

5. Cirsium howellii Petrak Cirsium howellii Petrak Cirsium

6. Cirsium undulatum (Nutt.) Spreng. var. ciliolatum Hend. Cirsium undulatum (Nutt.) Spreng. var. ciliolatum Hend. Cirsium

7. Artemisia arachnoidea Sheldon Artemisia arachnoidea Sheldon Artemisia

8. Megalodonta beckii var. hendersonii Sherff. Megalodonta beckii var. hendersonii Sherff. Megalodonta fl. 8/14/31; frt. 8/8/34

9. Senecio howellii Greenm. Senecio howellii Greenm. Senecio

10. Artemisia arachnoidea Sheldon Artemisia arachnoidea Sheldon

11. Senecio howellii Greenman Senecio howellii Greenman

12. Senecio howellii Greenm. Senecio howellii Greenm.
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