Solidago riddellii |
Solidago gigantea |
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giant goldenrod, smooth goldenrod |
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Habit | Plants 5–20 dm; rhizomatous. | |
Stems | simple or branched, glabrous, glaucous. |
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Leaves | cauline; blades broadly to narrowly oblanceolate or elliptic, 4–15 cm; margins entire to denticulate or serrulate; tips acute; surfaces glabrous; nerves pilose, sessile or short-petioled. |
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Inflorescences | thyrse-like arrays, rarely club-shaped; bracts reduced distally. |
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Involucres | campanulate, 2–5 mm. |
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Ray florets | 7–20. |
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Disc florets | 5–15; corollas 2.5–4.5 mm. |
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Phyllaries | in 3–5 series, linear-lanceolate; surfaces glabrous; outer gradually shorter. |
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Fruits | 1.3–1.5 mm, slightly strigose. |
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Heads | pedunculate. |
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2n | =18, 36, 54. |
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Solidago riddellii |
Solidago gigantea |
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Distribution | ||
Discussion | Meadows, riverbanks, wetlands, roadsides, disturbed areas. Flowering Jul–Sep. 0–1000 m. BW, Col, Owy, Sisk, WV. CA, ID, NV, WA; throughout North America. Native. |
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Source | Flora of Oregon, volume 2, page 345 Kenton Chambers |
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Sibling taxa | ||
Synonyms | Solidago gigantea var. serotina | |
Web links |