Solidago albopilosa |
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white-hair goldenrod |
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Habit | Plants 28–60 cm; caudices woody. |
Stems | 1–3+, erect, flexuous in proximal arrays, moderately to densely villous. |
Leaves | 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. |
Peduncles | 3–5 mm, sparsely strigose; bracteoles 1–3 scattered, ovate. |
Involucres | campanulate, 4.3–6.5(–7) mm. |
Ray florets | 3–5; laminae 2.4–4 × 1–1.5 mm. |
Disc florets | 5–8; corollas 2.2–2.5 mm, lobes ca. 1–2 mm. |
Phyllaries | in ca. 3 series, unequal, outer ovate, 1–1.5 mm, obtuse to acute, inner oblong, 1-nerved. |
Heads | 10–30, in short axillary and terminal racemiform/paniculiform clusters. |
Cypselae | (obconic) 1–2 mm, moderately hairy; pappi 2.3–2.8 mm. |
2n | = 36. |
Solidago albopilosa |
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Phenology | Flowering Sep. |
Habitat | Sandstone "rockhouses" (semicircular recesses which extend back under cliff overhangs, typically shaded and damp) |
Elevation | ± 400 m (± 1300 ft) |
Distribution |
KY |
Discussion | 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.) |
Source | FNA vol. 20, p. 128. |
Parent taxa | |
Sibling taxa | |
Name authority | E. L. Braun: Rhodora 44: 2. (1942) |
Web links |