DICOTYLEDONS. 177 



I. MOHRODENDRON. 



Trees or shrubs ; pubescence stellate ; leaves ample, den- 

 tate, petioled ; flowers in short lateral racemes or clusters, 

 white, bell-shaped, drooping on slender pedicels, appearing 

 with or before the leaves ; calyx obconic, obscurely 4-toothed, 

 adnate to the ovary, teeth persistent ; corolla 4-lobed or 

 4-petalous ; stamens 8-16, filaments flat, distinct or united 

 below ; the short style persistent, ovary 2-4-celled, ovules 4 

 in each cell ; fruit dry, prominently 2-4-winged, 1-3-seeded. 



1. M. DiPTEuuM (Ell.) Britt. Two-winged Silver-bell. A 



small tree; leaves oval, serrate, pubescent, 4-6 in. long; racemes 

 2-4-flowered ; flowers white, 1 in. wide, on long and slender pedi- 

 cels ; petals 4, nearly or quite distinct ; stamens 8, distinct, anthers 

 spreading; ovary .3-celled; fruit compressed, 2-winged, 1 in. long. 

 ]March-April. In rich woods. 



2. M. Caroliniaxum (L.) Britt. Four-winged Silver-bell. 

 Small trees; leaves oval to ovate-oblong, finely serrate, pubescent 

 when young, becoming smootli when old, 2-4 in. long; flowers 2-4 

 in a cluster, pedicels long and slender ; corolla 4-lobed ; stamens 

 mostly 12, united below the middle, anthers erect; ovary 4-celled ; 

 fruit l-l^ in. long, exceeding the pedicel, prominently 4-winged. 

 March-xVpril. River banks. 



II. STYRAX. 



Shrubs ; pubescence downy or scurfy-stellate ; leaves alter- 

 nate, entire or toothed, deciduous ; flowers white, in leafy 

 racemes ; calyx tube 5-toothed, slightly coherent with the 

 base of the ovary; corolla o-parted, the lobes spreading or 

 reflexed ; stamens 10, inserted on the base of the corolla, 

 distinct, or monadelphous below ; ovary [i-celled, style fili- 

 form, stigma 3-lobed ; fruit a globose, 3-valved, 1-seeded 

 capsule. 



1. S. Americana Lam. Smooth Sroirw. A slinil) 1-S ft. 

 \\'\'^\\ ; leaves ovate to ol)Ovate, usually acute at both ends, entire 

 or few-tooihed, tiiin, smootli when old, often scurfy l)elow when 

 young; flowers solitary or in 4-(l-flowered, scurfy racemes, pedicels 

 slender; calyx t(H'tii short, suhulale ; i»edieels and calyx glandular- 

 dotted; fruit globose, puherulent. [ in. in diaiuetei-. March-Mav. 

 lianks ot" streams. 



