G6 BUTACEyE. (UUE FAMILY.) 



Order 34. RUTACEiE. (Rue Family.) 



Herbs, slirubs, or trees, with exstipulate simple or compound dotted 

 leaves, and regular hypogynous perfect or unisexual flowers. — Sepals and 

 petals 3-5. Stamens as many or twice as many as the sepals. Ovaries 

 2-5, distinct or united, stipitate or sessile on a glandular disk. Styles 

 mostly united. Fruit commonly composed of separate 1-celled 2-valved 

 cai'pels. Embryo straight or curved, mostly in fleshy albumen. 



1. ZANTHOXYLUM, L. Prickly Ash. 



Flowers nioncecious or dioecious. Sepals and petals 3-5. Stamens 3-5. 

 Ovaries 2 - 5, sessile or stipitate, 2-ovuled. Carpels 2-valvcd, 1 - 2-scedcd. Seed 

 smooth and sliining. — Trees or shrubs, commonly armed with stipular prickles. 

 Leaves uneciually pinnate,«the leaflets punctate with pellucid dots. Flowers 

 small, greenish. 



1. Z. Carolinianum, Lam. (TooTnACiiE-TREE.) Smooth; branches 

 and commonly tlie petioles armed with long prickles ; leaves alternate, 7-9- 

 foliolatc; leaflets ovate-lanceolate, crcnate-scrrulatc, unequal-sided, sliining above; 

 panicles terminal; stamens 5; carpels 3, nearly sessile. — Var. fruticosom, 

 Gray. Shrubby ; leaves shorter, ovate or oblong, more strongly crcnatc ; ova- 

 ries always two. — Dry soil near the coast, Florida to North Carolina, and west- 

 ward. June. — A small tree, with the pungent bark armed with warty prickles. 



2. Z. Floridanum, Nutt. (Satin-Wood.) Branches and petioles un- 

 armed; leaflets 5-7, ovate-lanceolate on the fertile plant, and elliptical, obtuse 

 or eniarginate on the sterile, slightly crcnulate, and like the cyniose panicle stel- 

 late-pubescent ; stamens 4 - 5 ; carpels 1-2, obovate, stipitate ; seed solitary, 

 obovatc, black and shining. — South Florida. — Leaves l'-2' long. Cyme' 

 sessile, divided into three jirimary branches. Flowers minute. 



3. Z. Pterota, II. B. & K. Smooth ; branches zigzag, armed with short 

 curved prickles; petiole winged, jointed ; leaflets 7-9, small, obovate, coria- 

 ceous, crenatc above the middle, sessile; flowers in axillary clusters, which are 

 single or liy pairs, as long as the first joint of the petiole ; stamens 4 ; ovaries 

 2 ; caqjels solitary, globose, pitted, distinctly stipitate. — South'Florida. — Leaf- 

 lets I' - 5' long, those on the fertile plant narrower and smaller. Carpels small, 

 dotted. 



2. PTELEA, L. Hop-tree. 



Flowers polygamous. Sepals and petals 4-5, imbricated in the bud, decidu- 

 ous. Stamens 4 - 5. Ovary 2-(('lled, with two ovules in each cell. Style siiort. 

 Stigma 2-lohcd. Capsidc 2-eelled, 2-seedcd, surrounded by a bmnd circular 

 reticulated wing. — Unarmed shrubs, with trifoliolatc leaves, and snuill greenish 

 flowers in a tcmiinal cyme. 



1. P. trifoliata, L. Pubescent; leaves long-[K'tioled ; leaflets oval or 

 oblong, mostly acute, obscurely crcnulate, paler beneath, the lateral ones unequal- 



