Rhododendron minus |
Rhododendron minus var. chapmanii |
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Piedmont rhododendron |
Chapman's rhododendron |
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Habit | Shrubs, to 3(–5) mm, often rhizomatous. | Shrubs open, branches usually rigidly erect-ascending. | ||||
Stems | bark smooth to vertically furrowed, shredding; twigs with ferrugineous, multicellular, broad-rimmed, glandular-peltate scales. |
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Leaves | persistent; petiole with ferruginous, broad-rimmed, glandular-peltate scales and unicellular-hairy; blade narrowly elliptic to elliptic or oval, sometimes obovate, (1–)5–8(–13) × (1–)2–3.5(–5.5) cm, thick, coriaceous, margins entire, plane to conspicuously revolute, with scattered, glandular-peltate scales, apex acute or acuminate or obtuse to rounded, surfaces with scattered, ferruginous, broad-rimmed, glandular-peltate scales abaxially, (scales ± deciduous adaxially). |
petiole 2–6(–7) mm; blade 1.5–6.5 × 1–3 cm, apex obtuse to rounded (rarely notched or acute), secondary veins often depressed. |
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Inflorescences | 5–10-flowered; bracts similar to bud scales. |
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Pedicels | 5–15 mm, with ferruginous scales. |
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Flowers | opening before or after development of leaves, erect to horizontal, fragrant; calyx lobes 0.5–2 mm, with ferruginous scales; corolla dark to very pale pink or white, upper lobe usually with greenish spots, campanulate to funnelform, 15–37 mm, with scattered, ferruginous, peltate scales on outer surface, petals connate (for 3/4+ their lengths), lobes 8–19 mm, tube gradually expanding into lobes, 8–22 mm; stamens 10, included to slightly exserted, ± unequal, 13–26 mm. |
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Corollas | 23–37 mm. |
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Capsules | borne on erect pedicels, 6–14 × 2.9–5 mm, with ferruginous, peltate scales. |
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Seeds | with short, blunt/truncate tails at each end; testa closely appressed. |
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Floral | bud scales ferruginous-lepidote, sometimes also unicellular-hairy abaxially, margins unicellular-ciliate. |
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2n | = 26. |
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Rhododendron minus |
Rhododendron minus var. chapmanii |
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Phenology | Flowering early spring. | |||||
Habitat | Seasonally wet, pine flatwoods, borders of evergreen shrub bogs or bays, transition zone between branch bays and pine ridges | |||||
Elevation | 0-50 m (0-200 ft) | |||||
Distribution |
AL; FL; GA; NC; SC; TN
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FL |
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Discussion | Varieties 2 (2 in the flora). Rhododendron minus is here circumscribed broadly, including R. carolinianum and R. chapmanii, and the latter is considered to be a distinct variety (W. H. Duncan and T. M. Pullen 1962). Variety chapmanii is federally listed. This species is often grown as an ornamental. Rhododendron minus and R. lapponicum are members of subg. Rhododendron, as indicated by their glandular-peltate scales; the subgenus is represented by hundreds of species in eastern and southern Asia (see J. Cullen 1980). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 8, p. 460. | FNA vol. 8, p. 461. | ||||
Parent taxa | Ericaceae > subfam. Ericoideae > Rhododendron | Ericaceae > subfam. Ericoideae > Rhododendron > Rhododendron minus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | R. punctatum var. chapmanii, R. chapmanii | |||||
Name authority | Michaux: J. Hist. Nat. 1: 412. 1792 , | (Alph. Wood) Gandhi & Zarucchi: Harvard Pap. Bot. 14: 1. 2009 , | ||||
Web links |