Solidago elongata |
Solidago mollis |
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Cascade Canada goldenrod, narrow goldenrod, west coast Canada goldenrod, west coast goldenrod, west coast or Cascade Canada goldenrod |
soft goldenrod, soft or velvet (y) or ashly goldenrod, velvety goldenrod |
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Habit | Plants 25–150 cm; rhizomes short to long creeping, forming few- to many-stemmed clones. | Plants loosely clustered, 10–50 (–70) cm; rhizomes creeping. |
Stems | 1–20+, erect, proximally sparsely to moderately strigoso-villous, distally usually moderately to densely so. |
1 (at ends of rhizomes), ascending to erect, grayish green, moderately to densely finely strigilloso-puberulent. |
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 often withering by flowering, gradually tapering to winged petioles 1/2 length of leaf, blades 45–100 × 10–35 mm, proximalmost much smaller, margins serrate, faces moderately finely scabroso-strigillose; mid and distal cauline sessile, blades elliptic to lanceolate or ovate, 10–60 × 4–20 mm, sometimes much reduced distally, firm, thickish, margins serrate to entire, strongly 3-nerved or sometimes brochidodromous, faces moderately finely strigillose. |
Peduncles | 2–7 mm, sparsely to moderately short strigoso-villous; bracteoles 1–3, linear, rarely minutely stipitate-glandular. |
0.5–3 mm, moderately to densely finely hispiduloso-strigillose; bracteoles 0–3, lanceolate, strigillose, grading into phyllaries. |
Involucres | narrowly campanulate, 2.5–3.5(–4) mm. |
campanulate, 3–6 mm. |
Ray florets | (8–)11–15(–17); laminae 1–2.5 × 0.1–0.4(–0.7) mm. |
6–10; laminae 1–2 × 0.2–0.6 mm. |
Disc florets | (3–)5–11(–16); corollas 2.6–3.7(–4) mm, lobes 0.5–1.2 mm. |
3–8; corollas 2.4–3.8 mm, lobes 0.7–1.2 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 3–4 series, lanceolate to oblong (to 1.5 mm wide), strongly unequal, margins ciliate, apices acute to obtuse, glabrous. |
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. |
(5–)50–300, in compact thyrsiform to secund-pyramidal paniculiform arrays, proximal branches ascending, sometimes apically recurved or branches spreading, recurved, secund. |
Cypselae | (narrowly obconic) 1–1.5 mm, sparsely to moderately strigose; pappi 2.5–3.3 mm. |
(cylindro-obconic) 1.5–2 mm, sparsely strigillose; pappi ca. 2–3 mm. |
2n | = 18, 36. |
= 18, 36, 54. |
Solidago elongata |
Solidago mollis |
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Phenology | Flowering Aug–Oct. | Flowering Jul–Oct. |
Habitat | Sandy, gravelly soils, coastal headlands, thickets, open woods, meadows, along streams and creeks | Dry or drying prairies, open woods, along fence rows |
Elevation | 0–2800 m (0–9200 ft) | 300–1700 m (1000–5600 ft) |
Distribution |
CA; OR; WA; Mexico (Baja California)
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CO; IA; KS; MN; MT; ND; NE; NM; OK; SD; TX; WI; WY; AB; MB; SK
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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 mollis is quite variable in array shape, which ranges from compact club-shaped to elongate pyramid-shaped, the apex leaning to one side. Plants with narrower, more sparsely strigose leaves that are similar in appearance to those of S. radula but are not scabrous have been treated as var. angustata Shinners. Those occur in Oklahoma and Texas. G. L. Nesom (1993b) discussed the possible conspecificity of S. mollis and S. velutina (including S. sparsiflora and S. californica); this does not appear to be justified based on morphology and habitat differences. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 154. | FNA vol. 20, p. 161. |
Parent taxa | Asteraceae > tribe Astereae > Solidago > sect. Solidago > subsect. Triplinerviae | Asteraceae > tribe Astereae > Solidago > sect. Solidago > subsect. Nemorales |
Sibling taxa | ||
Synonyms | S. canadensis subsp. elongata, S. caurina, S. elongata var. microcephala, S. lepida var. caurina, S. lepida var. elongata | Doria incana, Doria mollis, S. incana, S. mollis var. angustata, S. nemoralis var. incana, S. nemoralis var. mollis |
Name authority | Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 327. (1841) | Bartling: Index Seminum (Göttingen) 1836: 5. (1836) |
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