Solidago elongata |
Solidago arguta |
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Cascade Canada goldenrod, narrow goldenrod, west coast Canada goldenrod, west coast goldenrod, west coast or Cascade Canada goldenrod |
Atlantic goldenrod, cut-leaf or sharp-leaf or Atlantic goldenrod, forest goldenrod |
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Habit | Plants 25–150 cm; rhizomes short to long creeping, forming few- to many-stemmed clones. | Plants 50–120 cm; caudices branching. | ||||||||||||
Stems | 1–20+, erect, proximally sparsely to moderately strigoso-villous, distally usually moderately to densely so. |
1 usually, erect, round, proximally glabrous, strigose in arrays. |
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Leaves | basal 0; proximal cauline sessile, blades narrowly to broadly oblanceolate, 35–75(–100) × (6–)7.5–14(–20) mm, proximal much smaller, tapering to bases, margins subentire or finely serrulate to coarsely, sharply serrate (teeth 0–9 per side), ciliate, 3-nerved, sometimes obscurely so, apices acute, abaxial faces glabrate to sparsely short-strigose, adaxial glabrous; mid to distal cauline sessile, blades oblanceolate, becoming lanceolate distally, 20–60 × 4–8(–11) mm, largest near mid stem, somewhat to much reduced distally, margins entire or finely serrulate, rarely serrate (teeth 1–8 per side), usually becoming entire to sparsely serrulate distally, ciliate, apices acute, faces glabrous or sparsely strigoso-villous, more so along abaxial nerves. |
basal and proximal cauline tapering abruptly to winged, thin petioles, blades broadly ovate, 100–300 × 30–100 mm, margins sharply serrate, apices acute to acuminate, adaxial faces glabrous or slightly scabrous, or sometimes strigose or strigillose; mid to distal cauline sessile, lanceolate, 50–72 × 10–14 mm, reduced distally, becoming entire. |
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Peduncles | 2–7 mm, sparsely to moderately short strigoso-villous; bracteoles 1–3, linear, rarely minutely stipitate-glandular. |
1.5–3 mm, glabrous or moderately short hispido-strigose, bracteoles 1–5, lanceolate-oblong, often grading into phyllaries. |
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Involucres | narrowly campanulate, 2.5–3.5(–4) mm. |
2.5–4.5(–5) mm. |
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Ray florets | (8–)11–15(–17); laminae 1–2.5 × 0.1–0.4(–0.7) mm. |
2–8; laminae 4–4.5 × 0.4–0.6 mm. |
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Disc florets | (3–)5–11(–16); corollas 2.6–3.7(–4) mm, lobes 0.5–1.2 mm. |
8–20; corollas 3.5–4 mm, lobes 0.6–1.5 mm. |
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Phyllaries | in 3–4 series, strongly unequal, margins sparsely long ciliate, acute, faces glabrous, rarely sparsely minutely stipitate-glandular; outer lanceolate, inner linear-lanceolate. |
in 3–4 series, unequal; outer ovate, acute, inner linear-oblong, ciliate, obtuse. |
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Heads | 12–500+, sometimes secund, in short to long, thyrsiform or narrowly secund-pyramidal paniculiform arrays, usually congested, club-shaped to rarely wand-shaped, (2.5–) 10–20 × (2–)4–8(–10) cm, branches usually ascending or sometimes arching spreading. |
25–250, secund, in open, leafy, paniculiform arrays with recurved branches (sometimes elongate), branches and peduncles hairy. |
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Cypselae | (narrowly obconic) 1–1.5 mm, sparsely to moderately strigose; pappi 2.5–3.3 mm. |
1.5–2 mm, distinctly ridged, glabrous or strigose distally; pappi 3–3.5 mm. |
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2n | = 18, 36. |
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Solidago elongata |
Solidago arguta |
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Phenology | Flowering Aug–Oct. | |||||||||||||
Habitat | Sandy, gravelly soils, coastal headlands, thickets, open woods, meadows, along streams and creeks | |||||||||||||
Elevation | 0–2800 m (0–9200 ft) | |||||||||||||
Distribution |
CA; OR; WA; Mexico (Baja California)
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AL; AR; CT; DE; FL; GA; IL; KS; KY; LA; MA; MD; ME; MO; MS; NC; NH; NJ; NY; OH; OK; PA; SC; TN; TX; VA; VT; WV; ON
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Discussion | In California, coastal plants of Solidago elongata often have thicker leaves; those of the Sierras are often membranous and obscurely triple-nerved. This species can be similar to S. lepida, which usually has much larger distal cauline leaves. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 2 (2 in the flora). Solidago arguta is reputedly in Ohio but its presence there is unconfirmed. The species includes a number of regional and ecotypal races investigated by G. H. Morton (1973, 1975). A. Cronquist (1980) is followed here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 20, p. 154. | FNA vol. 20, p. 131. | ||||||||||||
Parent taxa | Asteraceae > tribe Astereae > Solidago > sect. Solidago > subsect. Triplinerviae | Asteraceae > tribe Astereae > Solidago > sect. Solidago > subsect. Argutae > ser. Argutae | ||||||||||||
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Subordinate taxa | ||||||||||||||
Synonyms | S. canadensis subsp. elongata, S. caurina, S. elongata var. microcephala, S. lepida var. caurina, S. lepida var. elongata | Aster argutus | ||||||||||||
Name authority | Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 327. (1841) | Aiton: Hort. Kew. 3: 213. (1789) | ||||||||||||
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