Solidago altissima

Linnaeus

Sp. Pl. 2: 878. 1753.

Common names: Late goldenrod verge d’or haute
Treatment appears in FNA Volume 20. Treatment on page 153. Mentioned on page 151, 152, 156, 157.
Revision as of 20:27, 16 December 2019 by FNA>Volume Importer

Plants 50–200 cm; rhizomes short- to long-creeping. Stems 1–40+, usually short-hairy throughout, sometimes proximally glabrescent. Leaves: basal 0; proximal cauline usually withering by flowering; sessile or subpetiolate, tapering to bases; blades oblanceolate, 95–150 × 16–20 mm, relatively thick and firm, entire to serrate along distal 1/2, strongly 3-nerved, apices acute to acuminate, abaxial faces finely strigose, more so along nerves, adaxial ± scabrous; mid to distal cauline blades oblanceolate (proximally) to lanceolate (distally), mid (30–)45–100(–170) × (5–)7–16(–25) mm, much reduced distally [(15–)25–55 × (3–)4.5–10(–17) mm], margins finely serrate (teeth 0–6(–14) per side on mid), distally usually becoming entire or remotely serrulate, adaxial faces ± scabrous, abaxial moderately strigillose, densely villoso-strigillose along nerves, distal sometimes minutely stipitate-glandular. Heads (15–)100–1200+, secund, in secund, pyramidal, paniculiform arrays, branches divergent and recurved, sometimes ascending-divergent, sometimes merely club-shaped thyrsiform in small plants, 5–30 × 2–25 cm (often 1.5–2 times as long as wide in southern plants). Peduncles 1–3.5 mm, moderately densely short hispiduloso-strigillose, sometimes minutely stipitate-glandular; bracteoles linear, sometimes minutely stipitate-glandular. Involucres narrowly campanulate, 2.5–4.5 mm. Phyllaries in ca. 3 series, strongly unequal; outer lanceolate, acute, inner linear-lanceolate, margins rarely minutely stipitate-glandular, apices acute to obtuse. Ray florets (5–)8–13(–17); laminae 0.7–1.5(–2) × 0.1–0.4(–0.5) mm. Disc florets (2–)3–6(–9); corollas usually 2.3–3.6 mm, lobes 0.5–0.9(–1.2) mm. Cypselae (narrowly obconic) 0.5–1.5 mm, sparsely to moderately strigillose; pappi 2.5–3.5 mm.

Distribution

V20-328-distribution-map.gif

c, e North America, Mexico, introduced worldwide.

Discussion

Subspecies 2 (2 in the flora).

Selected References

None.

Key

1 Involucres usually 3–4 mm; Arizona, California, and Utah, edge of Great plains eastward through e United States, northward in Canada to Nova Scotia and w to Saskatchewan, n of prairies Solidago altissima subsp. altissima
1 Involucres usually 2–3 mm; Great plains e toIllinois Solidago altissima subsp. gilvocanescens
... more about "Solidago altissima"
John C. Semple +  and Rachel E. Cook +
Linnaeus +
Triplinerviae +
Late goldenrod +  and verge d’or haute +
c +, e North America +, Mexico +  and introduced worldwide. +
Altissimae +, Solidago subg. Brachyactis +, Solidago (sect. Undefined) ser. Paniculatae +, Serotinae +, Solidago subg. Triactis +  and Solidago (sect. Undefined) ser. Trinerves +
Solidago altissima +
Solidago subsect. Triplinerviae +
species +