Difference between revisions of "Chaetopappa asteroides"
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 301. 1836.
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|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Chaetopappa | |genus=Chaetopappa | ||
Revision as of 20:28, 16 December 2019
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
sc United States, 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 |