Dicotyls or Exogenous Plants. 77 



Eu-on'-y-mus at-ro-pur-pu'-re-us Jactj. Waahoo : Burning Bush. — Up- 

 right, ()-l-i ft. high; leaves petioled, oval oblong. 



Eu-on'-y-mus ob-o-va'-tus Nutt. [E. americanus var. obovatus T. & 

 G.) — Trailing with rooting branches; flowering stems 1-2 ft. high; 

 leaves obovate or oblong. fYVn m 



2. Genus CE-LAS'-TRUS. — Flowers poh'ganio- dioecious; petals 

 crenulate ; pod glol)Ose, orange-color, opening by 3 valves, displaying 

 the scarlet covering of the seeds. 



Ce-las'-trus scan'-dens L. Climbing Bitter-sweet: Wax-work. — Leaves 



ovate-oblong, finely serrate; a twining shrul). 



XLIX. Order STAPH-Y-LE-A'-CE->E. BLADDER-NUT FAMILY.— Shrubs 



with opposite, pinnate, stipulate leaves; sepals and petals each 5, 

 colored; fruit an inflated pod. 



1. Genus STAPH-Y-LE'-A. — Calj^x deeply 5-parted, the lobes erect, 

 whitish; petals 5, erect, spatulate; pod large, inflated, 3-lobed, 3-celled. 



Staph-y-le'-a tri-fo'-li-a L. Bladder-nut. — Leaflets 3, ovate, pointed; 

 branches greenish, striped. 



L. Order A-CER-A'-CE-ZE. MAPLE FAMILY.— Trees or shrubs; flowers 

 small, regular, petals often wanting; ovary 2-lobed, 2-celled; fruit 2- 

 •winged. 



1. Genus A'-CER. — Flowers polygamo-dioecious, calyx colored, 

 petals present or wanting; fruit a double samara; trees or shrubs; 

 'eaves opposite, palmataly lobed or pinnate. 



A. Leaves simple, %-h-lobed. 



(b. Flowers in i-acemes, appearing after the leaves ; shrubs or small trees) 



A'-cer penn-syl-van'-i-cum L. Striped Maple. — Leaves 3-lobed at the 

 apex, finely and sharply doubly-serrate ; racemes drooping, loose ; 

 petals obovate; fruit with large divergent wings. 



A'-cer spi-ca'-tum Lam. Mountain Maple. — Leaves downy beneath, 3 

 (or 5)-lobed, coarsely serrate; racemes upright, dense; petals linear- 

 spatulate; fruit with small or divergent wings. 



