Thymophylla concinna
Thymophylla
Sonoran dogweed, Sonoran pricklyleaf
pricklyleaf
spreading to ascending or erect.
erect to spreading or decumbent, branched from bases or ± throughout.
alternate;
blades 10–15 mm overall, lobed, lobes (3–)5–9, linear to filiform.
cauline; opposite or alternate; petiolate or sessile;
blades often pinnately lobed, blades or lobes spatulate to linear or filiform, ultimate margins entire or toothed, faces glabrous or arachnose, canescent, floccose, lanate, puberulent, or tomentose (bases little, if at all, bristly-ciliate, oil-glands scattered in laminae or submarginal).
1–5+ mm, glabrous.
obconic to campanulate, 5–6.5 mm.
campanulate to obconic, 2–7 mm diam.
convex, smooth or ± pitted, epaleate.
9–12;
corollas white to pale yellow, laminae 3–4 × 1–3.5 mm.
usually 5, 8, 13, or 21, pistillate, fertile;
corollas usually yellow to orange, rarely white.
ca. 25;
corollas pale yellow, 3–4.5 mm.
16–100+, bisexual, fertile;
corollas yellow to orange, tubes shorter than ± cylindric throats, lobes 5, deltate.
8–16, margins of outer distinct less than 1/2 their lengths, abaxial faces glabrous.
persistent, 8–13(–22) in ± 2 series (strongly connate 2/3–7/8+ their lengths, seldom with outer margins distinct more than 1/2 their lengths, exceptions: T. aurea, T. pentachaeta var. belenidium), usually bearing oil-glands.
0, or of 1–2 subulate bractlets, lengths less than 1/2 phyllaries.
0 or of 1–8 deltate to linear bractlets (bearing oil-glands).
usually radiate, sometimes discoid or radiant, borne singly.
2.5–3 mm;
pappi of 10–15 scales (each comprising 5–9 basally connate bristles) 1–2.5 mm.
obpyramidal, obconic, or cylindro-clavate, glabrous or sparsely strigillose;
pappi persistent, coroniform or of 10(–20) distinct scales (each scale erose, or 1–5-aristate, or a fascicle of 5–9 basally connate bristles).
= 8.
= 16.
Thymophylla concinna
Thymophylla
Species 13 (8 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Leaf blades not lobed (margins entire, toothed, or distally 3-fid); calyculi: lengths of bractlets usually 1/2+ phyllaries | → 2 |
1. Leaf blades usually lobed (lobes 3–15+, linear to filiform, blades linear, usually entire in T. tenuiloba var. wrightii); calyculi 0, or lengths of bractlets less than 1/2 phyllaries | → 4 |
2. Plants green, usually puberulent, sometimes glabrescent, rarely glabrous; leaves mostly opposite | T. acerosa |
2. Plants ashy white, arachnose, lanate, floccose, or tomentose; leaves mostly alternate | → 3 |
3. Stems spreading, often prostrate; leaf blades spatulate | T. micropoides |
3. Stems erect; leaf blades linear to filiform, sometimes distally 3-fid | T. tephroleuca |
4. Perennials or subshrubs (sometimes flowering first year); leaves mostly opposite | → 5 |
4. Annuals (rarely persisting); leaves mostly alternate (sometimes opposite at 1–3 proximal nodes) | → 6 |
5. Plants green, usually puberulent to canescent, sometimes glabrescent or glabrous; calyculi 0 or of 1–5 deltate bractlets | T. pentachaeta |
5. Plants ashy white, tomentose; calyculi of 1–3 subulate bractlets | T. setifolia |
6. Calyculi of 3–8 bractlets; disc florets 50–100+ | T. tenuiloba |
6. Calyculi 0, or of 1–2 bractlets; disc florets 25–45 | → 7 |
7. Margins of outer phyllaries distinct nearly to bases | T. aurea |
7. Margins of outer phyllaries distinct less than 1/2+ their lengths | T. concinna |
WildflowerSearch
iNaturalist
USDA Plants Database
CA
