Solidago lepida |
Solidago kralii |
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Canada goldenrod, Rocky Mountain goldenrod, verge d'or élégante, western Canada goldenrod, western goldenrod |
Kral's goldenrod |
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Habit | Plants 25–150 cm; rhizomes short to long creeping, forming few- to many-stemmed clones. | Plants 65–110 cm; rhizomes creeping. | ||||||||
Stems | 1–25 (–50+), erect, proximally glabrous or sparsely to moderately canescent-villous, distally densely so. |
1–10(–50), ascending to erect, glabrous or sparsely strigillose, copiously viscid-resinous in arrays. |
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Leaves | basal 0; proximal cauline sessile, blades narrowly to broadly oblanceolate, 100–150 × 15–23 mm, tapering to bases, margins subentire to coarsely sharply serrate, 3-nerved, sometimes obscurely so, apices acute to acuminate, abaxial faces glabrate to sparsely short villous, adaxial glabrous; mid to distal cauline sessile, blades lanceolate to narrowly elliptic, (50–)90–120(–150) × (7–) 11–23(–35) mm, largest near mid stem, then somewhat reduced distally in arrays, margins sharply and coarsely to finely serrate or entire, usually becoming less serrate near arrays, faces glabrous or sparsely strigoso-villous, more so along abaxial nerves, distalmost (below arrays) sometimes sparsely to moderately minutely stipitate-glandular. |
basal gradually tapering to winged petioles, blades oblanceolate, (25–)100–200 × (4–)15–28 mm, membranous, margins shallowly serrate apically (teeth less than 1 mm), finely ciliate, midnerves prominent, faces glabrous, viscid; rosettes present at flowering, at ends of elongated rhizomes, 1st leaves the smallest; proximal to mid cauline similar, sessile, blades linear-elliptic, quickly reduced; mid blades 40–80 × 6–9 mm, reduced distally, margins entire; distal sessile, blades linear-elliptic to linear, 10–35 × 1–3 mm, reduced in arrays. |
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Peduncles | 1–4 mm, villoso-hirtellous, sometimes minutely stipitate-glandular; bracteoles 0–2, linear-lanceolate, sometimes minutely stipitate-glandular. |
sparsely strigillose, copiously resinous, naked proximally to bracteolate near heads; bracteoles usually 1–3. |
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Involucres | campanulate, (2–)2.3–3.8(–5) mm. |
campanulate, 5–7 mm. |
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Ray florets | (7–)10–16(–22); laminae (0.5–)0.9–1.6(–2.2) × ca. 0.2–0.5 mm. |
3–5(–7); laminae 2.5–3.5 × 1–1.5 mm. |
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Disc florets | (2–)5–9(–13); corollas ca. (2–) 2.5–3.8(–5) mm, lobes (0.4–)0.6–1(–1.4) mm. |
10–16; corollas 5–6 mm, lobes 1–1.5(–1.8) mm. |
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Phyllaries | in 3–4 series, deltate-lanceolate, unequal (outer 1/4–1/2 length of inner), margins sparsely villoso-ciliate, sometimes minutely stipitate-glandular apically or basally, apices acute to attenuate, glabrous or sparsely to moderately, minutely stipitate-glandular apically, sometimes over much of faces. |
in 3–4 series, strongly unequal, apices obtuse, rounded to slightly cuspidate, ciliate, sparsely, finely strigose, obscured by exudate, copiously resinous; outer ovate (1.5–2 mm), mid narrowly ovate (3–4 × 1.5 mm), inner linear-lanceolate. |
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Heads | 14–800+, in sometimes secund, broadly thyrsiform or secund pyramidal arrays, usually leafy proximally, branches ascending or sometimes arching-spreading, leaves often minutely stipitate-glandular. |
50–200 (1–15 per branch), in narrowly thyrsiform, paniculiform arrays, 9–30 × 4–5 cm, longer branches ascending, 2–10 cm. |
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Cypselae | (narrowly obconic) 0.6–1.2 mm, strigillose; pappi 2.5–3.3 mm. |
fusiform to narrowly obconic, 3–5 mm, ribs 5–8, golden brown, darker than intercostal portions, thin, glabrous; pappi 4–5 mm (sometimes strongly clavate). |
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2n | = 18. |
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Solidago lepida |
Solidago kralii |
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Phenology | Flowering Aug–Sep. | |||||||||
Habitat | Turkey oak and pine scrub sandhills | |||||||||
Elevation | 40–100 m (100–300 ft) | |||||||||
Distribution |
AK; AZ; CA; CO; ID; MT; NM; NV; UT; WA; WY; AB; BC; MB; NB; NF; NT; ON; QC; SK; YT
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GA; SC |
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Discussion | Subspecies 2 (2 in the flora). Solidago lepida is the only member of subsect. Triplinerviae that is nearly always minutely, sometimes sparsely, stipitate-glandular in the arrays. These glands can be very small and visible only with 30–70× magnification. The enlarged head of the stalked gland may be little bigger than a pollen grain. The species occurs in the west from the Aleutian Islands and central Alaska south just into northern California, and in the Rocky Mountains to Arizona and New Mexico. Its range extends across Canada to Newfoundland, the Gaspé (Quebec), and northern New Brunswick. It also appears to be introduced at scattered locations across the Canadian prairies. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Solidago kralii is closely related to S. simplex, S. plumosa, and S. arenicola but occurs in a different habitat; it is much more copiously viscid-resinous than those species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 20, p. 155. | FNA vol. 20, p. 116. | ||||||||
Parent taxa | Asteraceae > tribe Astereae > Solidago > sect. Solidago > subsect. Triplinerviae | Asteraceae > tribe Astereae > Solidago > sect. Solidago > subsect. Humiles | ||||||||
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Subordinate taxa | ||||||||||
Synonyms | Aster lepidus, S. canadensis var. lepida | |||||||||
Name authority | de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 339. (1836) | Semple: Sida 20: 1606, figs. 1–11. (2003) | ||||||||
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