Difference between revisions of "Chaetopappa asteroides"

(Nuttall) de Candolle in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 301. 1836.

Common names: Tiny lazy daisy
Illustrated
Basionym: Chaetanthera asteroides Nuttall J. Acad. Nat. Sci. Philadelphia 7: 111. 1834
Treatment appears in FNA Volume 20. Treatment on page 208. Mentioned on page 207.
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Revision as of 22:54, 13 August 2020

Annuals, 3.5–30 cm; taprooted, eglandular or glandular. Leaves not densely overlapping, proximal to mid cauline blades oblanceolate to linear-oblanceolate, 4–15 × 1–4 mm, herbaceous, not clasping, flat, faces strigose, often orangish gland-dotted. Involucres cylindro-turbinate, 2.5–4 × 2.5–5 mm. Ray florets 5–18; corollas usually white, sometimes lavender-pink to deep lavender-rose. Disc florets 6–25, bisexual or central florets often functionally staminate. Cypselae 5(–6)-nerved, 1.6–2 mm, faces strigose; pappi in 2 series, outer of (4–)5(–6), scarious, irregular scales 0.1–1.4 mm plus inner of (4–)5(–6), tawny, awnlike, thick bristles 1.5–3 mm. 2n = 16.

Distribution

V20-462-distribution-map.gif

Ark., Kans., Mo., Okla., Tex., Mexico.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Ray florets 5–13; disc florets 6–15; pappus scales 0.1–0.8 mm Chaetopappa asteroides var. asteroides
1 Ray florets 10–18; disc florets 15–25; pappus scales 0.5–1.4 mm Chaetopappa asteroides var. grandis