70 DICOTYLEDONOUS PLANTS. 



HAB. Rocky woods. N. Y. to Car. W. to Miss. May, June. 

 2. Scape 4 6 inches high. Flowers violet, umbelled, with 

 the petals obovate and sometimes slightly emarginate. 



Violet Wood Sorrel. 



** Caulescent. 



3. O. corniculata Linn. : pubescent; stem rooting, decumbent, branch- 

 ed ; umbels shorter than the petioles ; leaves ternate, obcordate ; pe- 

 tals obovate, emarginate ; styles as long as the inner stamens. O. 

 corniculata, var. Mich. 



HAB. Woods. Can. to Car. May Aug. !. Stem 6 10 in- 

 ches long. Floicers small, yellow. It is distinguished chiefly 

 by its habit. 



4. O. stricta Linn.: hairy; stem erect, sometimes procumbent, 

 branched ; umbels about as long as the leaves ; leaves ternate, obcor- 

 date ; petals obovate, entire ; styles as long as the inner stamens. 



HAB. Sandy fields. Can. to Car. W. to Miss. May Aug. 

 If. Stem 4 10 inches high. Flmcers small, yellow, 4 6 in 

 an umbel. I'lmaht 11'ood Sorrel. 



ORDER XXX. ZANTHOXYLE.3S. LincJ. 



Flowers diclinous, regular. Calyx 3 4 5-divided, with 

 an imbricate aestivation. Petals equal in " number (rarely 

 none) to the sepals ; aestivation usually twisted-convolute. 

 Stamens as many or twice as many as the petals. Ovaries 

 aa many (or fewer) as petals, either altogether combined, or 

 more or less distinct ; ovales 2 in each cell, or rarely 4 ; styles 

 more or less combined. Fruit either baccate or membranous, 

 of 2 5 cells, or of several drupes or 2-valved capsules, of 

 which the sarcocarp is fleshy and partly separable from tho 

 ndocarp. Seeds solitary or in pairs ; embryo lying within 

 fleshy albumen ; radicle superior ; cotyledons ovate, flat. 



Trees or shrubs. Leaves without stipules, alternate or op- 

 posite, with pellucid dots. 



1. ZANTHOXYLUM. Linn. 



Dioecious. Calyx 3 9-lobed, often 4 5-parted. Petals 

 as many as the lobes of the calyx, rarely none. Stamens and 

 carpels as many as the lobes of the calyx, 1 3-seeded. 



Dioecia. Pentandria. 



Z.fraxineum IftUd.: prickly ; leaves pinnate ; leafets in 4 5 pairs, 

 ovate, obsoletely serrate, equal at base ; petioles terete, unarmed ; 

 prickles stipular ; umbels axillary. Z- ramiflorum Mich. Z. clara-her- 

 ca/uLtnn. Ell. 



