Solidago delicatula

Small

Bull. Torrey Bot. Club 25: 474. 1898.

Common names: Smooth elm-leaf goldenrod
Endemic
Synonyms: Solidago microphylla Engelmann ex Small Solidago ulmifolia var. microphylla A. Gray
Treatment appears in FNA Volume 20. Treatment on page 145. Mentioned on page 144.

Plants 40–120 cm; caudices compact, branching, woody. Stems 1–10+, essentially glabrous. Leaves: basal and proximal cauline tapering to short petioles, blades oblanceolate, 50–70 × 10–20 mm, margins serrate, scabroso-strigose, apices acute to acuminate, faces glabrous; mid and distal cauline subpetiolate or sessile, blades elliptic-lanceolate, 30–70 × 7–15 mm, gradually reduced distally, tapering to bases, margins serrate, scabroso-strigose; branch leaves similar, reduced to bracts distally. Heads 160–480 in paniculiform arrays, with a strongly secund, primary, arching axis and nearly always 4–5 (–8) leafy, elongate, arching, secund, proximal branches. Peduncles 2–5 mm, bracteolate, glabrous; bracteoles grading into phyllaries. Involucres narrowly campanulate, 3–5 mm. Phyllaries in 3–4 series, linear-lanceolate, strongly unequal, acute to ± attenuate, glabrous. Ray-florets 1–4; laminae 1–2 × 0.5–0.8 mm. Disc-florets 4–6; corollas 2.5 mm, lobes 1 mm. Cypselae 1.5–2 mm (6–9 ribs), sparsely strigose, more so apically; pappi 1.5–2 mm. 2n = 18.


Phenology: Flowering Aug–Oct.
Habitat: Sandy and alluvial soils, dry open woods, banks of shaded creeks
Elevation: 40–300 m

Discussion

Solidago delicatula is similar to S. ulmifolia, but is essentially glabrous (except for leaf margins) with smaller, more numerous, less conspicuously veiny leaves. It is sufficiently distinct from S. ulmifolia that inclusion in that species as var. microphylla does not appear warranted. Reports from Alabama, western Florida, Louisiana, and Mississippi are likely just smaller-leaved S. ulmifolia. Solidago helleri Small may be a hybrid between S. delicatula and S. ulmifolia.

Selected References

None.

Lower Taxa

None.
... more about "Solidago delicatula"
not tailed +, rounded +  and obtuse +
distinct +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +
indeterminate +  and determinate +
cone--shaped +
John C. Semple +  and Rachel E. Cook +
not persisting +
decurrent +
Solidago (sect. Undefined) ser. Venosae +
compound +  and simple +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
tapering;elliptic-lanceolate;oblanceolate +
reduced +
7mm;15mm +
rugulose +  and muricate +
proximalmost +
elongate +
Smooth elm-leaf goldenrod +
not 2-lipped +  and actinomorphic +
yellow +  and white +
ampliate +
2.5 cm25 mm <br />0.025 m <br /> (?) +
beaked +, 2-ribbed +  and 5-ribbed +
compressed +, narrowly obconic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Ark. +, Kans. +, Okla. +  and Tex. +
40–300 m +
resinous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Sandy and alluvial soils, dry open woods, banks of shaded creeks +
secund +  and leafy +
indeterminate +
heterogamous +  and homogamous +
elongate +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
campanulate +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.17 cm1.7 mm <br />0.0017 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.5mm;0.8mm +
scented +  and not anise +
sessile +  and subpetiolate +
cauline +, mid +, proximal +  and basal +
tapering +
erect;spreading +
triangular +  and narrowly lanceolate +
scabroso-strigose +
scented +  and not anise +
linear-lanceolate +  and oblong or ovate +
unequal +  and rarely subequal +
2-carpellate +
persistent +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
not persisting +
Flowering Aug–Oct. +
acute +  and more or less attenuate +
ovate-oblanceolate +
Bull. Torrey Bot. Club +
bearing subulate enations +, hairy +  and bristly +
strigillose +  and glabrous +
8 +  and 10 +
exalbuminous +
decumbent +  and ascending or erect +
1 +  and 10 +
appendaged +  and truncate +
papillate +  and smooth +
Solidago microphylla +  and Solidago ulmifolia var. microphylla +
Solidago delicatula +
Solidago (sect. Solidago) ser. Venosae +
species +
not persisting +
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 />) +