XIX. 27* 



nigra, Marsh. ; along Roelif Jannsen's Kill. — S. alba, L., and 

 Var. vitellina ; the variety is very common along the streams, 

 and elsewhere, — probably mostly planted in these places. — S. 

 Babylonica, Tourn. ; common in cultivation, — still I know of 

 no instance in which it has really run wild. — S. myrtilloides, 

 L. ; sparingly found in a large peat bog on southern part of 

 Stissing Mt. 



Populus tremuloides, Michx. ; common. — P. grandidentata, Michx. ; 

 rather common. — P. heterophylla. L. (?) ; swamp by Roelif 

 Jansen's Kill. — P. balsamifera, L. ; Var. candicans, and P. alba, 

 L., are spreading widely by the root in this region. — P. 

 dilatata, Ait. ; still found about many old homesteads, the 

 offspring from the plantings of the early Dutch settlers. 

 Conifers. 



Pinus rigida', Miller ; common. — P. strobus, L. ; common. 



Abies nigra, Poir. ; not rare; Eno Spruce Hole; Ooghan Hill 

 Marsh, etc. — A. Canadensis, Michx. ; common. — A. balsamea, 

 Marshall ; frequent on Stissing Mt., and a few of our other 

 wooded hills. 



Larix Americana, Michx. ; rather common. 



Thuja occidentalis, L. ; quite abundant towards the Hudson River, 

 but not found immediately about Pine Plains. 



Juniperus communis, L. ; frequent in all of our woods. — J. Virgin- 

 ian a, L, ; common. 



Taxus baccata, L.> Var. Canadensis, Cray ; rare on Stissing Mt. ; 

 not scarce on Mt. Riga. 



Araoe^e. 



Arisa?ma triphyllum, Torr. ; common. — A. Dracontium, Schott. ; 

 rather scarce; Thomas meadow, v along Shekomeko ; below 

 Silv email Falls. 



Peltanda Virginica, Raf. ; common. 



Symplocarpus foetid us, Salisb. ; common. 



Acorus Calamus, L. ; common. 



Lemnaceje. 



Lemna trisulca, L. ; scarce ; pool by Wappinger's Creek, in Ten- 

 eyck's meadow. — L. minor, L. ; common — L. polyrrhiza, L. ; 

 common. 



Tvphace.e. 



Typha latifolia, L. ; common. 



Sparganium eurycarpum, Engelm. ; not common ; in ditches in 

 Wappinger's marsh. — S. simplex, Huds. ; common. 

 Xaiadace.e. 



Naias fiexilis, Rostk. ; common. 



Zannichellia palustris, L. ; common in nearly all the streams and 

 ponds ; Wappinger's Creek, by Thompson Bridge. 



Potamogeton natans, L. ; common. — P. Oakesianus, Robbius ; 

 Thompson Pond, near inlet. — P. Claytonii, Tuckerm.; rare; 

 pool by R. R., Attlebury Hill. — P. lonchites, Tuckerm. ; rather 

 common ; abundant in Wappinger's Creek, etc. — P. amplifolius, 

 Tuckerm. ; not scarce ; abundant at N". end of Stissing Pond, etc. 

 — P. gramineus, L., common ; Wappinger's Creek. ; Hoffman 



