RUTACEAE (Rue Family) 

 ZANTHOXYLUM L. (Prickly Ash) 



947 Z. AMERicANUM Mill. (Northern Prickly Ash, Toothache Tree.) 



Bank along reservoir at Chinchilla. One mile west of Factory- 

 ville. 



PTELEA L. (Hop Tree) 



948 P. TRiFOLiATA L. Near Susquehanna, Prof. J. A. Graves. 



SIMARUBACEAE (Quassia Family) 

 AILANTHUS Desf. (Tree of Heaven) 

 949 A. GLANDULOSA Dcsf. A frequent escape. 



POLYGALACEAE (Milkwort Family) 

 POLYGALA L. (Milkwort) 



950 P. PAUCiFOLiA Willd. (Fringed Polygala.) Common. 



951 P. SANGUINEA L. Near Throop, abundant near Elmhurst reservoir, 



Waverly. 



952 P. NUTTALLii T. & G. Pike County, Prof. Porter. 



953 P. vERTiciLLATA L. Campbell's Ledge, near Taylor. 



954 P. VERTICILLATA, VAR. AMBiGUA Wood. Mocanaqua, Dudley. 



EUPHORBIACEAE (Spurge Family) 

 ACALYPHA L. (Three-Seeded Mercury) 



955 A. viRGiNicA L. Frequent. 



RICINUS L. (Castor-Oil Plant) 



956 R. COMMUNIS L. Linden Street dump, Scranton. Spontaneous. 



EUPHORBIA L. (Spurge) 



957 E. PRESLii Guss. Frequent. 



958 E. MACULATA L. (Milk Purslane.) Very common. 



959 E. coROLLATA L. (Flowering Spurge.) Wyoming. 



960 E. DARLiNGTONii Gray. Herrick Center, H. D. Dunn. 



961 E. cYPARissiAS L. (Cypress Spurge.) Near Gravel Pond, Nicholson. 



Waverly. 



962 E. PEPLUS L. (Petty Spurge.) Swetland Street. Scranton. 



963 E. LATHYRUS L. (Caper Spurge, Mole Plant.) Uniondale. 



CALLITRICHACEAE (Water Starwort Family) 

 CALLITRICHE L. (Water Starwort) 



964 C. DEFLEXA, VAR. AUSTiNi Hegelm. Tobyhanna Mills, Prof. Porter. 



965 C. PALusTRis L. Susquehanna, J. A. Graves. 



966 C. HETEROPHYLLA Pursh. Lake Henry, Pocono springs, Tobyhanna. 



48 



