Solidago petiolaris |
Solidago lepida |
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downy goldenrod, downy ragged goldenrod |
Canada goldenrod, Rocky Mountain goldenrod, verge d'or élégante, western Canada goldenrod, western goldenrod |
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Habit | Plants 40–150 cm; caudices stout, sometimes with long slender rhizomes. | Plants 25–150 cm; rhizomes short to long creeping, forming few- to many-stemmed clones. | ||||||||
Stems | 1–20(–50+), stout, finely puberulent or scabrous-puberulent at least distally. |
1–25 (–50+), erect, proximally glabrous or sparsely to moderately canescent-villous, distally densely so. |
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Leaves | basal absent at flowering; cauline sessile to short-petiolate; blades usually lanceolate-elliptic or ovate, sometimes linear-lanceolate, 30–150 × 5–30 mm, thick and firm, margins entire or few toothed, somewhat to much reduced distally, abaxial faces sometimes resinous and shiny, glabrous or strigillose (hairs mostly 0.1–1.4 mm), adaxial glabrous or scabrous. |
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. |
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Peduncles | mostly 2–15 mm, bracteolate, sparsely to densely short hispid-strigose. |
1–4 mm, villoso-hirtellous, sometimes minutely stipitate-glandular; bracteoles 0–2, linear-lanceolate, sometimes minutely stipitate-glandular. |
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Involucres | campanulate, 4.5–7.5 mm. |
campanulate, (2–)2.3–3.8(–5) mm. |
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Ray florets | (5–)7–9; laminae 3–7 × 1–2 mm. |
(7–)10–16(–22); laminae (0.5–)0.9–1.6(–2.2) × ca. 0.2–0.5 mm. |
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Disc florets | (8–)10–16; corollas 4–5 mm, lobes ca. 1–2 mm. |
(2–)5–9(–13); corollas ca. (2–) 2.5–3.8(–5) mm, lobes (0.4–)0.6–1(–1.4) mm. |
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Phyllaries | in 3–4 series, unequal, linear-lanceolate, acute to attenuate, ± squarrose-tipped, glabrous or moderately strigose, sparsely to moderately stipitate-glandular, sometimes viscid. |
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. |
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Heads | 10–190+ in paniculiform (rarely racemiform) arrays, usually elongate, usually leafy-bracteate, bracts similar to distal leaves but reduced; branches stiffly ascending, not secund, sometimes elongate. |
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. |
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Cypselae | 3–4 mm, glabrous or glabrate; pappi ca. 4 mm. |
(narrowly obconic) 0.6–1.2 mm, strigillose; pappi 2.5–3.3 mm. |
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2n | = 18, 36, 54. |
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Solidago petiolaris |
Solidago lepida |
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Phenology | Late Aug–Oct(–Nov). | |||||||||
Habitat | Woods and open places, especially sandy soils | |||||||||
Elevation | 0–1400[–2300] m (0–4600[–7500] ft) | |||||||||
Distribution |
AL; AR; FL; GA; IL; KS; LA; MO; NC; NE; NM; OK; SC; TX; Mexico (Coahuila)
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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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Discussion | Solidago petiolaris is reported from Colorado but that report has not been confirmed. G. L. Nesom (1990j) discussed variation in the species and mapped the distribution. It is variable in leaf and phyllary shape and indument. Although several varieties have often been recognized in floras, the characters used to distinguish them form continua of variation that do not break into distinct groupings. Several general trends are worth noting. Plants in the Ozarks often have very resinous leaves; that does not appear to correlate with phyllary indument traits. Phyllary pubescence varies in a continuous fashion as well, with the numbers and distribution of hairs not breaking into discontinuous ranges. Diploids are known from throughout the range; one report of a tetraploid comes from North Carolina. Two reports of tetraploids from Florida were based on misidentified specimens. Plants with compact short arrays approach S. wrightii in this trait. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
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Key |
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Source | FNA vol. 20, p. 118. | FNA vol. 20, p. 155. | ||||||||
Parent taxa | Asteraceae > tribe Astereae > Solidago > sect. Solidago > subsect. Thyrsiflorae | Asteraceae > tribe Astereae > Solidago > sect. Solidago > subsect. Triplinerviae | ||||||||
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Subordinate taxa | ||||||||||
Synonyms | Aster lindheimeranus, Aster petiolaris, S. angusta, S. harperi, S. lindheimeriana, S. milleriana, S. petiolaris var. angusta, S. petiolaris var. squarrulosa, S. petiolaris var. wardii, S. squarrulosa, S. wardii | Aster lepidus, S. canadensis var. lepida | ||||||||
Name authority | Aiton: Hort. Kew. 3: 216. (1789) | de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 339. (1836) | ||||||||
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