Thymophylla concinna
Thymophylla aurea
Sonoran dogweed, Sonoran pricklyleaf
manyawn pricklyleaf
spreading to ascending or erect.
erect (branched from bases).
alternate;
blades 10–15 mm overall, lobed, lobes (3–)5–9, linear to filiform.
alternate;
blades 15–40 mm overall, lobed, lobes 5–13, linear.
1–5+ mm, glabrous.
10–70 mm, glabrous or puberulent.
obconic to campanulate, 5–6.5 mm.
obconic to campanulate, 5–6 mm.
9–12;
corollas white to pale yellow, laminae 3–4 × 1–3.5 mm.
8–12;
corollas bright yellow, laminae 4–6 × 2–3 mm.
ca. 25;
corollas pale yellow, 3–4.5 mm.
30–45;
corollas yellow, 3 mm.
8–16, margins of outer distinct less than 1/2 their lengths, abaxial faces glabrous.
12–15, margins of outer distinct almost to bases, abaxial faces glabrous or puberulent.
0, or of 1–2 subulate bractlets, lengths less than 1/2 phyllaries.
0, or of 1–2 subulate bractlets, lengths less than 1/2 phyllaries.
2.5–3 mm;
pappi of 10–15 scales (each comprising 5–9 basally connate bristles) 1–2.5 mm.
3 mm;
pappi either of erose scales 0.3–0.6 mm, or of 3–5-aristate scales 2–3 mm.
= 16.
Thymophylla concinna
Thymophylla aurea
Varieties 2 (2 in the flora).
The two varieties of Thymophylla aurea are sometimes found in mixed populations, which may include intermediate plants.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Pappi of 18–20, 3–5-aristate scales 2–3 mm | var. polychaeta |
1. Pappi of 8–10 erose scales 0.3–0.6 mm | var. aurea |
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