Solidago flexicaulis
Solidago albopilosa
broad-leaf goldenrod, verge d'or à tige zigzaguante, zig-zag goldenrod
white-hair goldenrod
1–5+, flexuous, sparsely to moderately hairy in arrays.
1–3+, erect, flexuous in proximal arrays, moderately to densely villous.
rosettes present at flowering;
basal and proximal cauline tapering to winged petioles, blades ovate, (70–)100–140(–180) × (27–)40–60(–80) mm (petioles 1/4–1/2 total leaf length), margins serrate-serrulate [teeth (14–)21–33(–45)], abaxial faces glabrous or moderately hairy, more densely so on nerves, adaxial glabrous or sparsely hairy;
mid to distal cauline sessile, blades narrowly ovate to lanceolate, 38–90(–150) × 10–30(–55) mm, reduced distally, becoming lanceolate in arrays, bases tapering, margins entire to serrate, apices acuminate to cuspidate, faces glabrous or sparsely hairy, abaxial glabrous or moderately hairy, more densely so along nerves.
basal withering by flowering;
basal and proximal cauline abruptly tapering to winged, villous petioles (petioles ± 1/2 or less total leaf length), blades broadly ovate to spatulate, 46–80(–90) × 23–47(–55) mm, margins serrate [teeth 6–12(–15)], abaxial faces moderately villous, more so along nerves, adaxial sparsely to moderately villoso-strigose;
distal cauline petiolate, similar to proximal or more elliptic, 27–45 × 13–20 mm, margins entire to slightly serrate.
0.5–5 mm, moderately to densely strigose;
bracteoles 1–3, lanceolate, usually near base of involucres and grading into phyllaries.
3–5 mm, sparsely strigose;
bracteoles 1–3 scattered, ovate.
campanulate, 4.5–7(–8) mm.
campanulate, 4.3–6.5(–7) mm.
1–5;
laminae (2–)2.5–4(–5) × 0.7–2 mm.
3–5;
laminae 2.4–4 × 1–1.5 mm.
4–8(–11);
corollas 2–3(–4) mm, lobes 1–1.6(–2) mm.
5–8;
corollas 2.2–2.5 mm, lobes ca. 1–2 mm.
in ca. 3 series, strongly unequal, outermost 1–2 mm, innermost 3.7–4.7(–5.7) mm, linear-oblong, 1-nerved, apices obtuse to acute.
in ca. 3 series, unequal, outer ovate, 1–1.5 mm, obtuse to acute, inner oblong, 1-nerved.
25–250, in short axillary and terminal racemiform clusters, lateral panicles (2–)7–31(–56) cm.
10–30, in short axillary and terminal racemiform/paniculiform clusters.
(obconic) 1–2(–3) mm, moderately to densely strigose;
pappi 3–4.5 mm.
(obconic) 1–2 mm, moderately hairy;
pappi 2.3–2.8 mm.
= 18, 36.
= 36.
Solidago flexicaulis
Solidago albopilosa
The two cytotypes of Solidago flexicaulis show a strong geographic pattern. Diploids mostly occur east of the Appalachians except in the southwestern portion of the range, while tetraploids occur west of the mountains (J. G. Chmielewski and J. C. Semple 1985). The report of 2n = 90 for the species (Semple et al. 1993) was based on a specimen of the recently described Solidago faucibus. The significance of ploidy level on cypselae traits was analyzed in detail by Chmielewski et al. (1989).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Solidago albopilosa is found along the Red River Gorge in Menifee, Powell, and Wolfe counties. It is most similar to S. flexicaulis; it appears weaker and smaller than plants of S. flexicaulis that grow nearby, outside of the rockhouses. Its biology and origins have been discussed in detail (J. R. Beaudry 1959; M. L. Andreasen and W. H. Eshbaugh 1973). Solidago albopilosa is listed as threatened by the U.S. Fish and Wildlife Service (Federal Register 1988).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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