APPENDIX. 397 



Resembling, however, more the garden specimens than 

 some I received from Mr. Nuttall. 



97. Ilm.iA^TB.vs giganteus, var. crinitus, Nuttall, Gen. 

 II. p. 177. 



9S. Helianthus. 



I have not been able to determine this species, which is 

 but indistinctly characterized by the imperfect specimens 

 of the collection. 



99. BiDENs 7ninima, Pursh, 566. 



As a variety of /3. cernua, I think them distinct. 



XVIII. CLASS MONOECIA. 



100. Urtica T^rocera, Pursh, p. 113. 

 Common in Carolina and western country. 



101. PiNUS banksiana, Pursh, p. 642. 

 Found likewise on the Canada lakes. 

 103. Pmus balsamea, Pursh, p. 639. 

 On the mountains. 



103. PiNUs nigra, Pursh, p. 640. 

 Not rare on Pennsylvania mountains. 



104. PiNUS alba, Pursh, p. 641. 

 Distinguished by its incurved leaves. 



105. Fmvs pendula, Pursh, p. 645. 

 Black larch. 



Hab. On the northern lakes and streams. 



106. PiNus microcarpa, Pursh, p. 645. 

 Without strobilae. Red larch. 



Hab. Common along the northern lakes and stre£|jns. 



107. Thuja occidentalis, Pursh, p. 646. 

 Likewise on Pennsylvania mountains. 

 Vol. II. 51 



