STAPHYLEACEAE 127 



2. R. glabra L. SMOOTH SUMAC. 5-30 high : leaflets 11-31, ovate- 

 lanceolate, serrate, glahrous, whitish beneath : flowers and fruit as in 

 No. 1. Abundant in dry soil throughout. June-July. 



3. R. radicans L. POISON IVY. A climbing vine : leaflets 3, 

 rhombic-ovate, from entire to strongly serrate, pubescent : flowers in 

 axillary panicles. Very abundant throughout. A vile nuisance. May- 

 June. 



4. R. aromatica Marsh. FE AGE ANT SUMAC. 3-10 high : leaflets 

 three, ovate, rhomboid, pubescent, unequally crenate or crenate-dentate, 

 l / -2 / long : flowers in spikes developing before the leaves. Common in 

 rocky woods throughout. April-May. 



5. R. trilobata Nutt. SKUNK BUSH. Resembles the last but the 

 smaller (V or less long) glabrous leaflets crenately few-lobed or toothed. 

 Adventized at Sheffield ; and one clump native in a barren five miles 

 southeast of Grain Valley. April-May. 



FAMILY 74. CELASTRACEAE Lindl. 



Shrubs or vines with simple leaves and regular perfect flowers. Sepals, 

 petals and stamens 4-5, the stamens alternate with the petals and inserted 

 on the conspicuous disk. Ovary 2-5-celled, with two ovules in each 

 cell. Fruit a fleshy pod. 



Leaves opposite ; shrub. 1. EUONYMUS. 



Leaves alternate ; a vine. 2. CELASTEUS. 



1. EUONYMUS L. 



Flowers in axillary cymes. Capsules 3-5-lobed, the seeds enclosed in a 

 red aril. 



1. E. atropurpureus Jacq. BUENING BUSH. 6-20 high : leaves 

 ovate, acuminate, petioled, serrate : petals four, purplish. In woods 

 throughout, but not common. May-June. 



2. CELASTRUS L. 



Flowers greenish, in terminal racemes. Pods 3-celled, globose, orange- 

 colored, the seeds enclosed in a red aril. 



1. C. scandens L. BITTERSWEET. A twining vine with alternate, 

 ovate, petioled, crenulate leaves : petals five, whitish. Not uncommon 

 in woods throughout, especially in the northern part. June. 



FAMILY 75. STAPHYLEACEAE DC. 



Shrubs with opposite 3-foliolate, stipulate leaves, and perfect, regular 

 flowers. Sepals, petals and stamens five each, the latter inserted on a 

 fleshly disk. Ovary 3-lobed, with 1-many ovules in each cell. 



1. STAPHYLEA L. 



Flowers white, in drooping racemes on jointed pedicels. Fruit a large 

 inflated, bladdery capsule. 



