Thymophylla pentachaeta
Thymophylla aurea
five-needle pricklyleaf
manyawn pricklyleaf
erect or spreading.
erect (branched from bases).
mostly opposite;
blades mostly pinnately lobed, 6–28+ mm overall, lobes 3–11 linear to filiform (usually stiff, setiform).
alternate;
blades 15–40 mm overall, lobed, lobes 5–13, linear.
20–100 mm, puberulent or glabrous.
10–70 mm, glabrous or puberulent.
obconic to campanulate or hemispheric, 4–6 mm.
obconic to campanulate, 5–6 mm.
(8–)12–21;
corollas yellow to orange-yellow, laminae 2–6(–8) × 1–3 mm.
8–12;
corollas bright yellow, laminae 4–6 × 2–3 mm.
16–40 or 50–80;
corollas yellow, 2–4 mm (tending to zygomorphy in peripheral florets in some plants).
30–45;
corollas yellow, 3 mm.
12–21, margins of outer distinct 1/5 to nearly all their lengths, abaxial faces puberulent or glabrous.
12–15, margins of outer distinct almost to bases, abaxial faces glabrous or puberulent.
0, or of 1–5 deltate bractlets, lengths less than 1/2 phyllaries.
0, or of 1–2 subulate bractlets, lengths less than 1/2 phyllaries.
2–3 mm;
pappi of 10 erose and/or aristate scales mostly 1–3 mm.
3 mm;
pappi either of erose scales 0.3–0.6 mm, or of 3–5-aristate scales 2–3 mm.
Thymophylla pentachaeta
Thymophylla aurea
Varieties 4 (4 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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. Involucres cylindric, 2–3.5 mm diam.; disc florets 16–40 | var. hartwegii |
1. Involucres obconic, campanulate, or hemispheric, mostly 4–5 mm diam.; disc florets 50–80 | → 2 |
2. Peduncles 20–50 mm; margins of outer phyllaries distinct almost to bases | var. belenidium |
2. Peduncles (40–)50–100 mm; margins of outer phyllaries distinct less ca. 1/2 or ca. 1/3 their lengths | → 3 |
3. Leaf lobes mostly 9–11; phyllaries usually glabrous or glabrescent, rarely hairy | var. pentachaeta |
3. Leaf lobes mostly 5–7(–10); phyllaries densely puberulent | var. puberula |
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 |
CalFlora
WildflowerSearch
iNaturalist
USDA Plants Database
KS Wildflowers
