Thymophylla concinna |
Thymophylla setifolia |
|
---|---|---|
Sonoran dogweed, Sonoran pricklyleaf |
Texas pricklyleaf |
|
Habit | Annuals, green, 3–12+ cm, glabrous. | |
Stems | spreading to ascending or erect. |
|
Leaves | alternate; blades 10–15 mm overall, lobed, lobes (3–)5–9, linear to filiform. |
|
Peduncles | 1–5+ mm, glabrous. |
|
Involucres | obconic to campanulate, 5–6.5 mm. |
|
Ray florets | 9–12; corollas white to pale yellow, laminae 3–4 × 1–3.5 mm. |
|
Disc florets | ca. 25; corollas pale yellow, 3–4.5 mm. |
|
Phyllaries | 8–16, margins of outer distinct less than 1/2 their lengths, abaxial faces glabrous. |
|
Calyculi | 0, or of 1–2 subulate bractlets, lengths less than 1/2 phyllaries. |
|
Cypselae | 2.5–3 mm; pappi of 10–15 scales (each comprising 5–9 basally connate bristles) 1–2.5 mm. |
|
2n | = 16. |
|
Thymophylla concinna |
Thymophylla setifolia |
|
Phenology | Flowering spring, following rains. | |
Habitat | Sandy washes and flats, in deserts | |
Elevation | 50–100 m (200–300 ft) | |
Distribution |
AZ; Mexico (Sonora)
|
NM; TX; Mexico |
Discussion | Varieties 2 (1 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 21, p. 245. | FNA vol. 21, p. 240. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Pectidinae > Thymophylla | Asteraceae > tribe Heliantheae > subtribe Pectidinae > Thymophylla |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Hymenatherum concinnum, Dyssodia concinna | Dyssodia setifolia |
Name authority | (A. Gray) Strother: Sida 11: 376. (1986) | Lagasca: Gen. Sp. Pl., 25. (1816) |
Web links |