Solidago riddellii

Frank

W. J. Med. Phys. Sci. 8: 499. 1835.

Common names: Riddell’s goldenrod
Endemic
Basionym: Solidago amplexicaulis M. Martens 1841
Synonyms: Aster riddellii (Frank) Kuntze Oligoneuron riddellii (Frank) Rydberg
Treatment appears in FNA Volume 20. Treatment on page 165. Mentioned on page 108, 162, 163, 164.

Plants 40–100 cm; caudices branching; vascular-bundles and petiole bases marcescent (attached to old stems for more than a season). Stems 1–10+, erect, glabrous. Leaves: basal and proximal cauline usually withering by flowering (other rosettes may present), tapering to long, winged petioles, blades often recurved, linear-lanceolate or oblanceolate, 100–240 × 8–16 mm, folded along midrib (V-shaped in cross-section), bases usually with (2–) 3–8 prominent lateral nerves, apices acute to obtuse, faces glabrous; mid to distal cauline sessile, blades recurved, linear-lanceolate, 50–70 × 8–11 mm, reduced distally, folded, bases with prominent lateral nerves. Heads 30–450 in corymbiform to somewhat paniculiform with rounded corymbiform branches (robust plants) arrays, branches and peduncles strigillose. Peduncles 2.8–4 mm, moderately short-hispido-strigose, lanceolate bracteoles 0–1. Involucres narrowly campanulate, 4.5–6 mm. Phyllaries (14–18) in 3–4 series, unequal, obtuse, broad, striations weak, obtuse to rounded, glabrous. Ray-florets 7–9; laminae 4.5–5.5 × 0.4–0.5 mm. Disc-florets 6–10; corollas 4.5–5.2 mm, lobes 0.7–1.8 mm. Cypselae 1.5–2.2 mm, glabrous; pappi 3.5–4 mm (apically clavate). 2n = 18.


Phenology: Flowering Sep–Oct.
Habitat: Wet prairielike sites and marshy ground
Elevation: 100–400 m

Distribution

V20-361-distribution-map.gif

Man., Ont., Ill., Ind., Mich., Minn., Mo., Ohio, Wis.

Discussion

Selected References

None.

Lower Taxa

None.

"broad" is not a number.

... more about "Solidago riddellii"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
flat-topped +  and rounded +
John C. Semple +  and Rachel E. Cook +
decurrent +
Solidago amplexicaulis +
compound +  and simple +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
linear-lanceolate;oblanceolate;linear-lanceolate +
reduced +
8mm;11mm +
rugulose +  and muricate +
lanceolate +
corymbiform +  and paniculiform +
strigillose +
Riddell’s goldenrod +
not 2-lipped +  and actinomorphic +
yellow +  and white +
ampliate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.52 cm5.2 mm <br />0.0052 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
compressed +, narrowly obconic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Man. +, Ont. +, Ill. +, Ind. +, Mich. +, Minn. +, Mo. +, Ohio +  and Wis. +
100–400 m +
resinous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Wet prairielike sites and marshy ground +
glomerulate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
campanulate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.17 cm1.7 mm <br />0.0017 m <br /> (1 cm10 mm <br />0.01 m <br />) +
4.5mm;5.5mm +
0.4mm;0.5mm +
sessile +  and petiolate +
cauline +, proximal +  and basal +
erect;spreading +
triangular +  and narrowly lanceolate +
linear-lanceolate +  and oblong or ovate +
unequal +  and rarely subequal +
2-carpellate +
persistent +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
short-hispido-strigose +  and strigillose +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flowering Sep–Oct. +
ovate-oblanceolate +
W. J. Med. Phys. Sci. +
bearing subulate enations +, hairy +  and bristly +
strigillose +  and glabrous +
8 +  and 10 +
exalbuminous +
1 +  and 10 +
obtuse;rounded +
appendaged +  and truncate +
papillate +  and smooth +
Aster riddellii +  and Oligoneuron riddellii +
Solidago riddellii +
Solidago sect. Ptarmicoidei +
species +
100 cm1,000 mm <br />1 m <br /> (200 cm2,000 mm <br />2 m <br />) +
5 cm50 mm <br />0.05 m <br /> (100 cm1,000 mm <br />1 m <br />) +