310 FLORA OF TEXAS. 



white; leaves oblong, obtuse or acute, entire, deciduous; 

 calijx-\6hQS lanceolate acute, half the length of corolla; 

 flowering stems commonly leafless; filaments 2-awned. 

 Stem 2°-4° high ; leaves 2-3' long. 



OXYDENDRUM, DC. Sour-wood; Sorrel-tree. 



Calyx 5-parted; corolla ovate, 5-toothed; stamens 10; 

 antliers awnless, opening by terminal chinks; the cells 

 acuminate; capsule conical, 5-angled, 5-celled, many- 

 seeded; seeds ascending. — A small tree, with deciduous 

 oblong serrulate acuminate leaves, on slender petioles, and 

 \i\utQ floiuers in long and slender 1-sided terminal panicled 

 racemes. 



0. ARBOREUM, DC. Tree 15°-40° high ; leaves 4-6' long, 

 sour ; corolla pubescent. 



CLETHRA, L. 



Calyx 5-parted^ imbricated in the bud ; corolla 5-petalous; 

 stamens 10 ; antliers obcordate, inverted in the bud, open- 

 ing by terminal pores ; style slender, 3-cleft ; capsule 3-cell- 

 ed, 3-valved, many-seeded. — Sliriibs or small trees ; leaves 

 alternate, oblong or obovate, serrate, deciduous; ^^o?6'e;'5 

 white, in terminal racemes ; stamens and style exserted. 



C. ALXIFOLIA, L. Shrubby; branches and racemes 

 tomentose; leaves short-petioled, obovate or wedge-oblong, 

 acute, smooth on both sides ; racemes simple or panicled ; 

 style and filaments smooth ; bracts partly persistent. (C. 

 paniculata, Pursh.) — Varies, with i\\Qleaves hoary beneath, 

 rough above (C. tomentosa, Lam.), or on both sides (C. 

 scabra, Pers.) ; style hairy ; hracts caducous, 4'^-8° high ; 

 leaves 2-3' long; floivers fragrant. 



ARBUTUS. 

 A. Texaxa, Bucklev. Leaves ovate, acute, serrate, 



