This section is from the book "Woody Plants In Winter", by Earl L. Core, Nelle P. Ammons. Also available from Amazon: Woody Plants in Winter.
Deciduous shrubs or small trees with stellate pubescence. Twigs rounded; pith relatively large, continuous, with a network of firmer strands. Buds solitary, sessile, the lateral small, the terminal larger, rosy, acute. Leaf-scars alternate, clustered toward the tip, triangular; bundle-trace 1; stipule-scars none.
a. | Shrub to 3 m. high, on the coastal plain | 1. | C. alnifolia |
a. | Taller shrub or small tree, to 6 m. high, in the mountains | 2. | C. acuminata |
1. C. alnifolia L. Sweet Pepperbush. Shrub 1-3 m. high; twigs slender; terminal bud about 5 mm. long. Damp woods, on the coastal plain, Texas to Florida, north to Maine (Fig. 239).

Fig. 239. Clethra alnifolia.

Fig. 240. Clethra acuminata.
2. C. acuminata Michx. White-Alder. A shrub or small tree to 6 m. high, with upright or spreading branches; twigs slender; buds tomentulose, the terminal 5 mm. long; fruit a persistent ovoid nodding capsule, 5 mm. long. Woods, in the mountains, West Virginia to Georgia and Tennessee (Fig. 240).
 
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