XVII. 25* 



Laurace^e. 



Sassafras officinale, Nees. ; common. 



Lindera Benzoin, Meisner ; rather common on Mountain and else- 

 where. 



Thymeleace^e. 



Dirca palustris, L. ; frequent in our moist woods, but never abun- 

 daut. 



Saxtai.ace.e. 



Commandra umbellata, Nutt. ; common. 



Ceratophyllacejs. 



Ceratophyllum demersum, L. ; common : in some of the stations in 

 this district the plants appear to fruit very freely. 

 Catlitrichace^e. 



Callitriche verna, L. ; not very common. — C. heterophylla, Pursh ; 

 common, — far more so than preceding species. 

 Euphorbiace^:. 



Euphorbia maculata, L. ; common. — E. hypericifolia, L. ; common. 

 — E. Cyparissias, L. ; along roadsides ; the waste places in Pine 

 Plains Evergreen Cemetery are completely overrun by this 

 weedy immigrant. 



Acalypha Yirginica, L, ; common. 



Urticace^e. 



Ulmus fulva, Michx. ; comiuon. — U. Americana, L. ; common. — U. 

 racemosa, Thomas ; not very frequent. 



Celtis occidentalis, L. ; rather common on Stissing Mt. ; Var. crassi- 

 folia ; near Stissing, probably escaped from cultivation into 

 copses. 



Moms rubra, L. ; frequent on Stissing Mt. — M. nigra, L. ; running 

 wild. — M. alba, L. ; this species with the preceding was largely 

 planted 35 years ago, for the purpose of feeding silk-worms, 

 into which enterprise — l'earing silk-worms — one of the old 

 citizens of this place embarked a large amount of capital. The 

 trees are now everywhere springing up spontaneously. 



Urtica gracilis, Ait ; common. — IT. dioica, L. ; sparingly introduced. 



Laportea Canadensis, Gaud. ; common along the large streams, and 

 in all our moist rich woods. 



Pilea pumila, Gray ; very common. 



Bcehmeria cylindrica, Willd. ; very common. 



Cannabis sativa, L. ; scarce, — waste grounds of Evergreen Ceme- 

 tery ; occasionally found in alluvial lands of Leander Smith, 

 etc., along Wappinger's Creek. It was many years ago largely 

 cultivated for manufacturing purposes on some of these grounds. 

 (G. M. Wilier.) 



Humulus Lupulus, L. ; common, — along Roelif Jansen's Kill and the 

 other creeks ; also on Stissing Mt. and along the border of the 

 large swamps. It is certainly indigenous in Pine Plains. 

 Plataxace^e. 



Platanus occidentalis, L. ; common. 



JUGLANDACE^E. 



Juglans cinerea, L. ; common. — J. nigra, L. ; quite common. 

 Carya alba, Nutt. ; very common. — C. tomentosa, Xutt. ; rather 



