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Clethra alnifolia L.  
Family: Clethraceae
Coastal Sweet-Pepperbush
[Clethra alnifolia f. rosea Rehder, moreClethra alnifolia var. glabella Michx., Clethra alnifolia var. paniculata (Aiton) Rehder, Clethra bracteata Raf., Clethra paniculata]
Clethra alnifolia image
Erika Harness
  • FNA
  • Gleason & Cronquist
  • Resources
Gordon C. Tucker, Sean C. Jones in Flora of North America (vol. 8)
Shrubs 1-3 m. Stems ± terete; young shoots puberulent. Leaves: petiole 2.5-3.5(-6) cm; blade obovate to oblong (widest distal to midpoint), 5-9(-12) × 2-4(-6) cm, base cuneate to rounded, margins obscurely to clearly toothed, especially distally (proximalmost tooth averaging 3.4 cm distal to base), apex obtuse to acute, surfaces sparsely hairy and glabrescent abaxially, glabrous adaxially. Inflorescences solitary or in clusters of 2-4, (6-)9-15(-19) cm, axis sparsely stellate-hairy. Pedicels 2-4 mm, proximalmost averaging 3 mm, shortly stellate-hairy; bract shorter than flower, proximalmost 5-7 mm, shortly stellate-hairy. Flowers: sepals 3.5-5 × 1-1.5 mm, stellate-pubescent; petals white (rarely pink abaxially or on both surfaces), 5-8 × 4-5 mm; filaments 4-6(-6.5) × 0.2-0.3(-0.4) mm, glabrous; anthers 1-1.3 mm; style 6-7 mm, hairy in proximal 1/2, hairs simple, straight. Capsules subglobose, 2.5-4 × 3.5-5.3 mm. Seeds 1-1.5 mm. 2n = 16, 32. Flowering summer. Broad-leaved swamps, Chamaecyparis swamps, wet pine forests, sometimes in dry, sandy woods and rocky, acidic ridge tops; 0-200 (-400) m; N.S.; Ala., Conn., Del., Fla., Ga., La., Maine, Md., Mass., Miss., N.H., N.J., N.Y., N.C., Pa., R.I., S.C., Tex., Va.
Vascular plants of NE US and adjacent Canada
Shrub to 3 m; lvs obovate-oblong, 5-10 cm, obtuse or subacute, finely and sharply serrate distally, mostly entire below the middle, tapering to a petiole 0.5-1(-2) cm, racemes erect, 5-15(-20) cm, densely short-hairy as also the pedicels (2-5 mm) and cal; pet oblong- obovate, 5-7 mm, glabrous; filaments glabrous; style strigillose; frs ±ascending, pubescent, 3 mm thick; 2n=32. Swamps and moist woods, mostly near the coast; N.S. and Me. to Fla. and Tex. July, Aug.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
Clethra alnifolia
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Mia Fox
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Samuel Royer
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Kayla Cannon
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Tess Kuracina
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Lily Bennett
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Karl Russek
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Johannes Nelson
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Tingyuan Sheng
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The National Science Foundation
This project made possible by National Science Foundation Awards 1601697, 1600981, 1601393, 1600976, 1601429, 1601101, 1601503
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