SUPPLEMENT. 317 



Pyrus sitchensis, p. 22-1; replaces Pyrus sambucifolia. 



Quercus marilandica, p. 168. 



Quercus nigra, p. 167. 



Quercus velutina, p. 163. 



Quercus virginiana, p. 157. 



Red-bud, or Judas Tree. Cercis Canadensis, p. 30. 

 The Eed-bud is distributed from south Ontario, New 

 York, and New Jersey, south to Florida, and west to 

 Minnesota, east Nebraska, and Texas. It is abundant on 

 the banks of streams in Maryland and West Virginia. 



Robinia Pseudo-Acacia, p. 213. 



Sassafras variifolium, p. 39. 



Tilia Michauxii, p. 47; replaces the older name Tilia 

 pubescens. 



Tupelo, or Sour Gum, p. 31. It is found sparingly 

 distributed along the lake shores of central and south- 

 ern New Hampshire. 



Willow, Glaucous. Salix discolor. A shrub or small 

 tree with a maximum height of 25 feet. Leaves smooth 

 at maturity, lance-shaped or narrow elliptical, pointed 

 at either end, irregularly toothed or toothless, or the 

 teeth dwindling toward the leaf-tip, smooth and green- 

 white beneath, from 3 to 5 inches long. Catkins devel- 

 oping long before the leaves. On river banks and in 

 meadow copses or moist situations, from Maine to Vir- 

 ginia, and westward. 



Willow, Osier. Salix viminalis. A cultivated species 

 introduced from Europe for the manufacture of wicker- 

 ware, and not infrequently established on wet ground 

 in the Eastern and Middle States. A small tree or 

 shrul) with green or light-brown twigs and attenuated 

 lance-shaped, taper-pointed, uneven-margined deep green 



