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waxy coneflower

Habit Plants 5–15 dm.
Stems

glabrous nearly throughout, sometimes pilose or scabrous beneath heads.

Basal leaves

lanceolate to elliptic, 20–50 × 4–10 cm, bases attenuate;

margins entire to sparsely serrate;

tips acute;

surfaces glaucous.

Cauline leaves

similar to basal, 10–25 × 2–8 cm.

Receptacles

conic or columnar, 25–40 × 15–20 mm.

Ray florets

7–15;

rays 25–40 mm.

Disc florets

250–400;

corollas 3–4 mm; yellowish green.

Phyllaries

5–20 mm;

surfaces glabrous.

Fruits

3.5–5 mm; black;

pappi partly fused, scaly crowns.

Heads

radiate; solitary or 2–10 in corymb-like arrays.

2n

=36.

Rudbeckia glaucescens

Distribution
[WildflowerSearch map]
[BONAP county map]
Discussion

Seeps, bogs, marshes, serpentine. Flowering Jun–Sep. 100–1400 m. CR, Sisk. CA. Native.

Source Flora of Oregon, volume 2, page 335
Kenton Chambers
Sibling taxa
R. alpicola, R. hirta, R. occidentalis
Synonyms Rudbeckia californica, Rudbeckia californica var. glauca
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