Solidago elongata |
Solidago curtisii |
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Cascade Canada goldenrod, narrow goldenrod, west coast Canada goldenrod, west coast goldenrod, west coast or Cascade Canada goldenrod |
Curtis' goldenrod, mountain decumbent goldenrod |
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Habit | Plants 25–150 cm; rhizomes short to long creeping, forming few- to many-stemmed clones. | Plants (20–)40–90(–100) cm; caudices woody. | ||||
Stems | 1–20+, erect, proximally sparsely to moderately strigoso-villous, distally usually moderately to densely so. |
1–4, erect, straight, glabrous or moderately hirtello-strigose. |
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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 withering by flowering; proximal to mid cauline weakly petiolate or sessile, blades lanceolate to elliptic, (36–)95–150(–180) × (10–)19–43(–60) mm, margins serrate (with (3–)8–20(–36) teeth), faces glabrous or sparsely hairy, more so along nerves; distal cauline sessile, blades narrowly lanceolate to narrowly elliptic, (5–)37–90(–130) × (3.5)5–18(–34) mm, margins entire to sparsely serrate (0–9(–14) teeth), faces glabrous or sparsely hairy, sometimes more pilose along nerves. |
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Peduncles | 2–7 mm, sparsely to moderately short strigoso-villous; bracteoles 1–3, linear, rarely minutely stipitate-glandular. |
2–6 mm, moderately to densely finely strigose; bracteoles 0–3, linear-oblong. |
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Involucres | narrowly campanulate, 2.5–3.5(–4) mm. |
narrowly campanulate, (5–)5.6–7(–8) mm. |
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Ray florets | (8–)11–15(–17); laminae 1–2.5 × 0.1–0.4(–0.7) mm. |
2–4(–6); laminae (2–)2.5–4(–4.6) × 1–2 mm. |
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Disc florets | (3–)5–11(–16); corollas 2.6–3.7(–4) mm, lobes 0.5–1.2 mm. |
3–7(–9); corollas mostly 2–3 mm, lobes 1–1.7(–2.4) 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, strongly unequal, outermost 1–1.4(–2) mm, innermost (2.5–)3–4(–4.4) mm, obtuse to acute, 1-nerved. |
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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. |
20–800 in short axillary and terminal racemiform/paniculiform, non-secund arrays (2–)8.5–38.5(–65) cm. |
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Cypselae | (narrowly obconic) 1–1.5 mm, sparsely to moderately strigose; pappi 2.5–3.3 mm. |
1–2(–3) mm, sparsely to moderately strigose; pappi (2–)2.7–3.6(–4.5) mm. |
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2n | = 18, 36. |
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Solidago elongata |
Solidago curtisii |
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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; GA; KY; MS; NC; SC; TN; VA; WV
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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.) |
Varieties 2 (2 in the flora). Solidago curtisii is similar to S. caesia and may be confused with robust, pressed and dried specimens of the latter if they are mounted such that the arching habit cannot be observed. (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. 126. | ||||
Parent taxa | Asteraceae > tribe Astereae > Solidago > sect. Solidago > subsect. Triplinerviae | Asteraceae > tribe Astereae > Solidago > sect. Solidago > subsect. Glomeruliflorae | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | S. canadensis subsp. elongata, S. caurina, S. elongata var. microcephala, S. lepida var. caurina, S. lepida var. elongata | S. ambigua var. curtisii, S. caesia var. curtisii | ||||
Name authority | Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 327. (1841) | Torrey & A. Gray: Fl. N. Amer. 2: 200. (1842) | ||||
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