Thymophylla concinna
Thymophylla pentachaeta
Sonoran dogweed, Sonoran pricklyleaf
five-needle pricklyleaf
spreading to ascending or erect.
erect or spreading.
alternate;
blades 10–15 mm overall, lobed, lobes (3–)5–9, linear to filiform.
mostly opposite;
blades mostly pinnately lobed, 6–28+ mm overall, lobes 3–11 linear to filiform (usually stiff, setiform).
1–5+ mm, glabrous.
20–100 mm, puberulent or glabrous.
obconic to campanulate, 5–6.5 mm.
obconic to campanulate or hemispheric, 4–6 mm.
9–12;
corollas white to pale yellow, laminae 3–4 × 1–3.5 mm.
(8–)12–21;
corollas yellow to orange-yellow, laminae 2–6(–8) × 1–3 mm.
ca. 25;
corollas pale yellow, 3–4.5 mm.
16–40 or 50–80;
corollas yellow, 2–4 mm (tending to zygomorphy in peripheral florets in some plants).
8–16, margins of outer distinct less than 1/2 their lengths, abaxial faces glabrous.
12–21, margins of outer distinct 1/5 to nearly all their lengths, abaxial faces puberulent or glabrous.
0, or of 1–2 subulate bractlets, lengths less than 1/2 phyllaries.
0, or of 1–5 deltate 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.
2–3 mm;
pappi of 10 erose and/or aristate scales mostly 1–3 mm.
= 16.
Thymophylla concinna
Thymophylla pentachaeta
Varieties 4 (4 in the flora).
(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 |
WildflowerSearch
iNaturalist
USDA Plants Database
CalFlora
