The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

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
from FNA
AZ; CA; NV
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 21, p. 239.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Pectidinae > Adenophyllum
Sibling taxa
A. porophylloides, A. wrightii
Synonyms Dyssodia cooperi
Name authority (A. Gray) Strother: Sida 11: 376. (1986)
Web links