Parr 1, 1914] CLETHRACEAE 5 
calyx-segments ovate, 3.5-4 mm. long, acute, strongly ribbed; petals erect, cuneate, 6-7 mm. 
long, notched at the apex; filaments villous; style glabrous; capsule ovoid, 5 mm. long, 
drooping. 
Type Locatiry: High mountains of Carolina. 
DIstRIBUTION: Mountains of Virginia and West Virginia to Tennessee, Georgia, and Alabama. 
ILLustRations: W. Bartén, Fl. N. Am. pl. 71; Bot. Cab. pl. 1427; Britton, N. Am. Trees 
f. 685; Britt. & Brown, Ill. Fi. f. 2725; ed. 2. f. 3196. 
4. Clethra suaveolens Turcz. Bull. Soc. Nat. Mosc. 36?: 230. 1863. 
Twigs rather slender, glabrous. Leaves oblong to lanceolate, subcoriaceous, 12 em. long 
or less, 2-4 cm. wide, entire-margined, somewhat paler beneath than above, obtuse, acute or 
acuminate at the apex, narrowed or obtuse at the base, glabrous on both sides, the venation 
not very prominent, the petioles 12 mm. long or less; racemes 12 or fewer, tomentose, 9-16 
em. long; pedicels slender, 3-8 mm. long; calyx tomentulose, about 4 mm. long, its segments 
ovate-oblong, obtuse or acutish; petals entire or erose, about 5 mm. long; style 2-2.5 mm. long; 
ovary tomentulose. 
TYPE LOCALITY: Chiapas, at 2100 meters altitude. 
DISTRIBUTION: Chiapas to Santa Rosa and Alta Verapaz, Guatemala. 
5. Clethra costaricensis Britton, sp. nov. 
Twigs stout, densely villous with long brown hairs. Leaves obovate or elliptic-obovate, 
chartaceous, 10-17 cm. long, sparingly undulate-dentate or entire, 8 cm. wide or less, dark- 
green and loosely pubescent or becoming glabrous above, paler and densely villous 
beneath, obtuse or acutish at the apex, somewhat narrowed to the obtuse base, the stout, 
densely villous petioles 1.5-2.5 cm. long; racemes 4-6, densely brown-villous, 12-20 cm. long, 
the central one sometimes with 2 or 3 slender, divergent branches; pedicels 3-5 mm. long; 
calyx tomentose, 4 mm. long, its segments ovate-oblong, obtuse; petals obovate, erose, about 
one third longer than the calyx; style about 3 mm. long. 
Type collected on the border of savannas of Cafias Gordas, Costa Rica, at 1100 m. altitude, 
February, 1897, H. Pittier 11115 (herb. N. Y. Bot. Gard.). 
6. Clethra Pringlei S. Wats. Proc. Am. Acad. 25:157. 1890. 
A tree, 8-13 m. high, the slender twigs densely and finely tomentose. Leaves oblanceolate 
to oblong or obovate, subcoriaceous, entire, or few-toothed above the middle, 4-11 cm. long, 
2-6 em. wide, acuminate to obtuse at the apex, narrowed or obtuse at the base, glabrous above, 
white-tomentulose beneath and brownish short-villous on the veins, the rather stout short- 
villous petioles 5-12 mm. long; racemes several, simple or branched, slender, finely white- 
tomentulose, 10-25 cm. long; pedicels slender, 6-10 mm. long; calyx-segments ovate, acute or 
acuminate, 3 mm. long; petals obovate, short-fimbriate; style about 2 mm. long; capsule 
tomentulose, bluntly 3-lobed, 3-4 mm. thick. 
Type Locality: Mountains east of San Luis Potosi, Mexico. 
DIstRIBUTION: Mountain canyons, San Luis Potosi. 
7. Clethra macrophylla Mart. & Gal. Bull. Acad. 
Brux. 91: 539. 1842. 
A small tree, the twigs, petioles, racemes, and veins of the under leaf-surfaces finely brown- 
ish-tomentulose. Leaves subcoriaceous, obovate to oblong-elliptic, 2 dm. long or less, 2.5-8 
cm. wide, minutely stellate-pubescent or becoming glabrous above, densely and finely white- 
tomentulose beneath, low-denticulate or subentire, acute or subacuminate at the apex, acute 
or obtuse and inequilateral at the base, the stout petioles 1-2.5 cm. long; racemes about 10, 
slender, 10-15 cm. long; pedicels about 2 mm. long; bracts linear-lanceolate, about as long 
as the pedicels; calyx tomentulose, 2.5-3 mm. long, its segments lanceolate to ovate-lanceolate, 
obtusish; style about 2.5 mm. long. 
Typs LocaLity: Near Totutla and Mirador, Vera Cruz. 
Disrrisution: Mountains of Vera Cruz. 
