Solidago ptarmicoides

(Torrey & A. Gray) B. Boivin

Phytologia 23: 21. 1972.

Common names: Upland white aster white flat-top goldenrod verge d’or faux-ptarmica
Endemic
Basionym: Aster ptarmicoides Torrey & A. Gray Fl. N. Amer. 2: 160. 1842
Synonyms: Diplopappus albus (Nuttall) Lindley ex Hooker Diplopappus ptarmicoides (Nees) Lindley Doellingeria ptarmicoides Nees Eucephalus albus (Nuttall) Nuttall Heleastrum album (Nuttall) de Candolle Inula alba Nuttall Oligoneuron album (Nuttall) G. L. Nesom Solidago asteroides Semple Unamia alba (Nuttall) Rydberg Unamia ptarmicoides (Nees) Greene
Treatment appears in FNA Volume 20. Treatment on page 164. Mentioned on page 108, 162, 165, 166.

Plants 10–40 cm; caudices branching; vascular-bundles and petiole bases marcescent (attached to old stems for more than a season). Stems 1–20+, erect, slender, glabrous proximally, hispid distally. Leaves: basal and proximal cauline persistent, subpetiolate to sessile, blades sometimes 3-nerved, linear to linear-lanceolate, 60–100 × 7–10 mm, stiff, flat, margins entire or subentire, faces glabrous or sparsely hairy; mid to distal cauline sessile, blades linear-oblanceolate to linear, 20–40 × 3–5 mm, reduced distally, margins entire. Heads 1–25 (–50), in corymbiform arrays. Peduncles 29–36.5 mm, strigillose; bracteoles linear. Involucres 5–6 mm. Phyllaries in 4–5 series, usually prominently 1-nerved, linear, strongly unequal, outer acute, inner acute to obtuse, glabrous. Ray-florets 10–20, usually white, rarely pale-yellow (conspicuous); laminae 7–7.3 × 1.4–1.6 mm. Disc-florets 30–36; corollas 3.8–4.1 mm, lobes 0.5–0.7 mm. Cypselae (obconic) 1–1.5 mm (ribbed), glabrous; pappi 3.4–4 mm (apically clavate). 2n = 18.


Phenology: Flowering Jul–Oct.
Habitat: Dry, sandy, usually calcareous soils, cracks in rocks, limestone pavements, rocky outcrops, grassy slopes, prairies
Elevation: 0–1500 m

Distribution

V20-359-distribution-map.gif

Man., Ont., Que., Sask., Colo., Conn., Ill., Ind., Iowa, Mich., Minn., Mo., Mont., N.H., N.Y., Ohio, Okla., S.C., S.Dak., Vt., Wis., Wyo.

Discussion

L. Brouillet and J. C. Semple (1981) summarized the morphologic, chemical, cytological, and hybridization data on Solidago ptarmicoides and concluded that, except for the white rays, it is a typical member of sect. Ptarmicoidei. The species hybridizes with S. rigida, S. ohioensis, S. riddellii, and perhaps other goldenrods. It is not known to hybridize with any species of aster (regardless of genus); the supposed Aster × Solidago hybrids are the basis of all reports of intergeneric hybrids in the literature. Horticultural hybrids involving S. ptarmicoides and other Solidago species have been treated as S. ×luteus (M. L. Green ex Dress) Brouillet & Semple (×Solidaster luteus M. L. Green ex Dress). Solidago ×bernardii B. Boivin [Oligoneuron ×bernardii (B. Boivin) G. L. Nesom] is the formal name applied to S. ptarmicoides × S. riddellii hybrids; those have cream rays. Solidago ×lutescens (Lindley ex de Candolle) B. Boivin [Diplopappus lutescens Lindley ex de Candolle; D. albus var. lutescens (Lindley ex de Candolle) Hooker ex Torrey & A. Gray; Aster lutescens (Lindley ex de Candolle) Hooker ex Torrey & A. Gray; A. ptarmicoides var. lutescens (Lindley ex de Candolle) A. Gray; Oligoneuron ×lutescens (Lindley ex de Candolle) G. L. Nesom] applies to hybrids between S. ptarmicoides and S. rigida or S. riddellii from the prairies; these also have cream colored rays.

Selected References

None.

Lower Taxa

None.
... more about "Solidago ptarmicoides"
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 +
(Torrey & A. Gray) B. Boivin +
decurrent +
Aster ptarmicoides +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
linear-oblanceolate;linear +
reduced +
3mm;5mm +
rugulose +  and muricate +
Upland white aster +, white flat-top goldenrod +  and verge d’or faux-ptarmica +
not 2-lipped +  and actinomorphic +
yellow +  and white +
ampliate +
0.38 cm3.8 mm <br />0.0038 m <br /> (0.41 cm4.1 mm <br />0.0041 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
compressed +, narrowly obconic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Man. +, Ont. +, Que. +, Sask. +, Colo. +, Conn. +, Ill. +, Ind. +, Iowa +, Mich. +, Minn. +, Mo. +, Mont. +, N.H. +, N.Y. +, Ohio +, Okla. +, S.C. +, S.Dak. +, Vt. +, Wis. +  and Wyo. +
0–1500 m +
resinous +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Dry, sandy, usually calcareous soils, cracks in rocks, limestone pavements, rocky outcrops, grassy slopes, prairies +
glomerulate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
acute +  and obtuse +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
campanulate;cylindric +
0.5 cm5 mm <br />0.005 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 />) +
7mm;7.3mm +
1.4mm;1.6mm +
subpetiolate +  and sessile +
persistent +
cauline +, proximal +  and basal +
erect;spreading +
triangular +  and narrowly lanceolate +
subentire +  and entire +
linear-lanceolate +  and oblong or ovate +
unequal +  and rarely subequal +
2-carpellate +
persistent +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
2.9 cm29 mm <br />0.029 m <br /> (3.65 cm36.5 mm <br />0.0365 m <br />) +
Flowering Jul–Oct. +
ovate-oblanceolate +
pale-yellow +  and white +
bearing subulate enations +, hairy +  and bristly +
strigillose +  and glabrous +
8 +  and 10 +
exalbuminous +
1 +  and 20 +
slender +
appendaged +  and truncate +
papillate +  and smooth +
Diplopappus albus +, Diplopappus ptarmicoides +, Doellingeria ptarmicoides +, Eucephalus albus +, Heleastrum album +, Inula alba +, Oligoneuron album +, Solidago asteroides +, Unamia alba +  and Unamia ptarmicoides +
Solidago ptarmicoides +
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 />) +