Adenophyllum cooperi |
|
---|---|
Cooper dyssodia, Cooper's dogweed |
|
Habit | Perennials or subshrubs, 30–50+ cm. |
Leaves | mostly not lobed, blades oblanceolate to ovate, 8–25 × 4–8 mm (bases sometimes toothed or obscurely lobed, oil-glands 1–2 pairs near base, 1 near tip, each leaf). |
Peduncles | 60–150 mm. |
Involucres | campanulate to obconic, 15–18 mm. |
Ray florets | (0–)7–13; corollas yellow-orange, becoming red-orange; tubes 5 mm, laminae 8–10 × 2.5–4 mm. |
Disc florets | 50–80+; corollas yellow, 8–10 mm. |
Phyllaries | ca. 20, lanceolate to linear, separating in fruit. |
Calyculi | of 12–22 linear-attenuate, gland-bearing, bractlets 5–8 mm. |
Cypselae | 5–7 mm; pappi of 15–20 scales 7–10 mm, each comprising 5–9, basally connate bristles. |
2n | = 26. |
Adenophyllum cooperi |
|
Phenology | Flowering spring–fall. |
Habitat | Sandy and gravelly soils of washes and alluvial fans in deserts |
Elevation | 0–1300 m (0–4300 ft) |
Distribution |
AZ; CA; NV
|
Source | FNA vol. 21, p. 239. |
Parent taxa | |
Sibling taxa | |
Synonyms | Dyssodia cooperi |
Name authority | (A. Gray) Strother: Sida 11: 376. (1986) |
Web links |