Difference between revisions of "Solidago rupestris"
Ann. Nat. 1: 14. 1820.
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|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Solidago | |genus=Solidago |
Revision as of 21:47, 27 May 2020
Plants 50–150 cm (solitary or clustered); rhizomes creeping, elongate. Stems 1–10+, erect, proximally glabrous, increasingly puberulent distally into arrays. Leaves: basal 0; mid and distal cauline numerous (sometime 100+ per stem), crowded, sessile or subsessile; blades linear-elliptic, mostly 50–120 × 6–12 mm, tapering at both ends, margins remotely serrulate or subentire, 3-nerved, faces glabrous or sometimes puberulent abaxially on midnerves. Heads 80–900+, in paniculiform arrays, branches recurved, secund. Peduncles 1–3 mm, sparsely strigose; bracteoles linear, 1–3. Involucres narrowly campanulate, 2–3 mm. Phyllaries in 3–4 series, linear-lanceolate, strongly unequal, midribs raised, enlarged apically, apices acute to usually obtuse or rounded, apically ciliate. Ray florets mostly 7–11, 1–2 × 0.1–0.2 mm. Disc florets 2–7; corollas 2–3 mm, lobes 0.4–0.6 mm. Cypselae (narrowly obconic) 1–1.5 mm, sparsely strigillose; pappi 2–2.5 mm. 2n = 18, 36.
Phenology: Flowering Jul–Sep.
Habitat: Riverbanks
Elevation: 0–200+ m
Distribution
![V20-340-distribution-map.gif](/w/images/9/9b/V20-340-distribution-map.gif)
Ind., Ky., Md., Pa., Tenn., Va.
Discussion
Solidago rupestris is similar to S. canadensis in head size but with fewer rays, and it is vegetatively more like S. gigantea. It is uncommon, occurring in a series of disjunct populations with an apparent gap between eastern and western areas of the range.
Selected References
None.