Solidago elongata |
Solidago macrophylla |
|
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Cascade Canada goldenrod, narrow goldenrod, west coast Canada goldenrod, west coast goldenrod, west coast or Cascade Canada goldenrod |
large-leaf goldenrod, verge d'or à grandes feuilles |
|
Habit | Plants 25–150 cm; rhizomes short to long creeping, forming few- to many-stemmed clones. | Plants 20–105 cm; rhizomes short, thick, woody. |
Stems | 1–20+, erect, proximally sparsely to moderately strigoso-villous, distally usually moderately to densely so. |
usually 1, erect, strigose in arrays. |
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 narrowing abruptly to elongated petioles, blades spatulate to lanceolate or ovate, 60–120(–150) × 14–45(–65) mm, gradually reduced distally, margins serrate (teeth 4–17), abaxial faces glabrous, glabrous or hairy along nerves, adaxial glabrous or sparsely strigose; mid to distal cauline petiolate to sessile, abruptly to gradually tapering to short broadly winged petiole-like bases, blades lanceolate, 22–46(–57) × 8–20(–29) mm, bases rounded, margins entire to slightly serrate, apices acute to acuminate, faces glabrous or sparsely hairy. |
Peduncles | 2–7 mm, sparsely to moderately short strigoso-villous; bracteoles 1–3, linear, rarely minutely stipitate-glandular. |
5–25 mm, densely short hispido-strigose; bracteoles 0–3, linear. |
Involucres | narrowly campanulate, 2.5–3.5(–4) mm. |
campanulate, (8.6–)9.5–11.5(–12.5) mm. |
Ray florets | (8–)11–15(–17); laminae 1–2.5 × 0.1–0.4(–0.7) mm. |
7–13; laminae (4–)4.5–6.5 × 1–2 mm. |
Disc florets | (3–)5–11(–16); corollas 2.6–3.7(–4) mm, lobes 0.5–1.2 mm. |
14–29; corollas (4.4–)5–6 mm; lobes 1–2 mm. |
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 2–3 series, sometimes weakly unequal, glabrate, margins ciliate; outermost ovate, 3–5(–7) mm, acuminate, innermost lanceolate, 1-nerved, tapering to rounded tip. |
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. |
2–110+ (1–10 per branch) in leafy, racemiform or short, axillary and terminal racemiform-paniculiform clusters, lateral branches erect, 4–43 cm. |
Cypselae | (narrowly obconic) 1–1.5 mm, sparsely to moderately strigose; pappi 2.5–3.3 mm. |
(± linear-obconic) 1.4–4.4 mm, glabrous; pappi (3.7–)5–6.5(–7.3) mm. |
2n | = 18, 36. |
= 18. |
Solidago elongata |
Solidago macrophylla |
|
Phenology | Flowering Aug–Oct. | Flowering Aug–Sep. |
Habitat | Sandy, gravelly soils, coastal headlands, thickets, open woods, meadows, along streams and creeks | Sandy and gravelly soils, rocky ledges, and outcrops, open areas in woods and thickets |
Elevation | 0–2800 m (0–9200 ft) | 0–1000+ m (0–3300+ ft) |
Distribution |
CA; OR; WA; Mexico (Baja California)
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ME; NH; NY; VT; NB; NS; ON; PE; QC; SPM; Nfld and Labr
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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.) |
Solidago ×calcicola (Fernald) Fernald (S. virgaurea Linnaeus var. calcicola Fernald) is considered to be a hybrid between S. macrophylla and possibly a member of subsect. Triplinerviae. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 154. | FNA vol. 20, p. 129. |
Parent taxa | Asteraceae > tribe Astereae > Solidago > sect. Solidago > subsect. Triplinerviae | Asteraceae > tribe Astereae > Solidago > sect. Solidago > subsect. Glomeruliflorae |
Sibling taxa | ||
Synonyms | S. canadensis subsp. elongata, S. caurina, S. elongata var. microcephala, S. lepida var. caurina, S. lepida var. elongata | Aster thyrsoideus, S. macrophylla var. thyrsoidea, S. mensalis, S. thyrsoidea |
Name authority | Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 327. (1841) | Banks ex Pursh: Fl. Amer. Sept. 2: 542. (1813) |
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