Solidago brachyphylla
Solidago ptarmicoides
Dixie goldenrod
prairie goldenrod, upland white aster, verge-d'or faux-ptarmica, white flat-top goldenrod
1–5, sparsely to moderately strigoso-puberulent.
1–20+, erect, slender, glabrous proximally, hispid distally.
basal petioles 3–5 cm, blades oblanceolate or spatulate to ovate or rotund, 2–4 cm (excluding petioles);
cauline (numerous) subsessile or sessile, blades elliptic or lance-elliptic to ovate, mid mostly 25–50(–65) × 10–25 mm, distal much reduced;
branch leaf petioles 1 mm, blades ovate, 5–15 (excluding petioles) × 2–10 mm.
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.
linear, 1–3 mm, bracteate.
29–36.5 mm, strigillose;
bracteoles linear.
narrowly campanulate, 3–5 mm.
5–6 mm.
0(–2).
10–20, usually white, rarely pale yellow (conspicuous);
laminae 7–7.3 × 1.4–1.6 mm.
4–8;
corollas 3 mm, lobes 1 mm.
30–36;
corollas 3.8–4.1 mm, lobes 0.5–0.7 mm.
in 3–4 series, lanceolate, strongly unequal, margins ciliate, apices acute, glabrous.
in 4–5 series, usually prominently 1-nerved, linear, strongly unequal, outer acute, inner acute to obtuse, glabrous.
75–200 in open paniculiform arrays, branches divaricate, ascending to recurved, weakly to strongly secund, to 50 cm, secondary branches less than 3 cm.
1–25(–50), in corymbiform arrays.
2.5–3 mm, moderately short-strigose;
pappi 2 mm.
(obconic) 1–1.5 mm (ribbed), glabrous;
pappi 3.4–4 mm (apically clavate).
= 18.
= 18.
Solidago brachyphylla
Solidago ptarmicoides
Solidago brachyphylla possibly occurs also in Mississippi.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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