36 APPENDIX. 



Ilex verticillata (L.) A. Gray. Black Alder. In moist soil. 



Ilex verticillata cyclophylla Robinson. Small-leaved Ilex. Buckwampum moun- 

 tain, Durham, J. A. & H. F. Ruth. 



Ilex laevigata (Pursh) A. Gray. Smooth Winter-berry. Bristol, I. C. Martindale; 

 Tullytown. 



Family 4. Celastraceae Lindl. 



Euonymus Americanus L. Strawberry Bush. Bensalem, I. C. Martindale; Bristol; 



Grenoble, N. E. Arnold. 

 Euonymus obovatus Nutt. Running Strawberry Bush. Langhorne's Hill, I. C. 



Martindale. 

 Euonymus atropurpurcus Jacq. Burning Bush. Wahoo. In thickets. 

 Euonymus Europaeus L. Spindle-tree. Bristol; Tullytown. 

 Celastrus scandens L. Climbing Bittersweet. In thickets. 



Family 5. Staphyleaceae DC. 

 Staphylea trifolia L. American Bladder-nut. On moist hillsides. 



Family 6. Aceraceae St. Hil. 



Acer saccharinum L. Silver Maple. Native along the lower Delaware. 



Acer rubrum L. Red Maple. In meadows and swamps. 



Acer saccharum Marsh. Sugar Maple. Frequent in the upper districts. 



Acer nigrum Michx. Black Sugar Maple. Narrows. 



Acer Pennsylvanicum L. Striped Maple. In the county according to Porter. 



Acer spicatum Lam. Mountain Maple. Along the Delaware south to Point Pleas- 

 ant, and up the Tohickon to Pipersville, (M. C.). 



Acer Negundo L. Box Elder. Along streams in the lower end, I. C. Martindale; 

 Sellersville. 



Family 7. Balsaminaceae Lindl. 



Impatiens biflora Walt. Spotted Touch-me-not. In moist grounds. 

 Impatiens aurea Muhl. Pale Touch-me-not. Along the Delaware. 



Order 17. RHAMNALES. 

 Family i. Rhamnaceae Dumort. 

 Ceanothus Americanus L. New Jersey Tea. In woods and thickets. 



Family 2. Vitaceae Lindl. 



Vitis Labrusca L. Northern Fox-grape. In thickets. 

 Vitis a^tivalis Michx. Summer Grape. In thickets. 

 Vitis bicolor LeConte. Winter Grape. In the county, (P. Fl.). 



Vitis vulpina L. Riverside Grape. Nockamixon rocks, Dr. T. C. Porter; near New- 

 Hope, Dr. E. Newlin Williams. 

 Vitis cordifolia Michx. Frost Grape. Chicken Grape. Along streams. 

 Parthenocissus quinquefolia (L.) Planch. Virginia Creeper. In thickets. 



