Lake Distriet: Interlacustrine Area. 391 
..The Forest Formations. 
The forests of ah are extensive and approach those of northern and 
central Ontario in the number and distribution of the species. Except in the 
more southern districts the elms, maples and beeches occupy restricted areas, 
as they do further east, and the trees of Quebec with few exceptions are the 
trees of the New Brunswick area. The following additional species enter 
Quebec, but only along the Ottawa and St. Lawrence valleys. 
Acer dasycarpum Ehrh. (= A.saccha- | Carya amara Nutt. (= Hicoria minima 
rinum L.). Marsh.). 
Crataegus coccinea L. Carya alba Nutt. (=H. ovata Mill.). 
Ulmus fulva Michx. 
» racemosa Thomas (= 
masi Sarg.). 
U. Tho- 
Carpinus caroliniana Walt. 
Quercus alba L 
Populus monilifera Ait. (= P. deltoides 
Juniperus virginiana L. [Marsh.). 
None of these trees are very abundant and the elms and the bitternut 
Carya amara (Hicoria minima) are the only ones that can be called common 
in Quebec. 
Floristic Character. Owing to the position and extent of province of On- 
tario, its forests are not all of the same character and while in the north and 
northwest the species are identic with those found in Quebec, those in the 
south and southwestern peninsula are quite distinct and may be said to be a 
reproduction of the northern Ohio and Pennsylvania forest formations and 
hence this territory belongs to another phytogeographic region. Common to 
Ontario and Quebec’) are eighty-five species not found south of the 
Celtis occidentalis L. 
Interlacustrine Area. 
Anemone narcissiflora L. 
Thalictrum alpinum L. 
Ranunculus affınis R. Br. (= R. peda- 
tiidus J. E. Smith). 
cardiophyllus Hook. 
Arabis patula Graham (= A. rg 
Rydb.). 
»  retrofacta Graham. 
Erysimum lanceolatum Pursh (= E 
asperum DC.). 
Vesicaria arctica Rich. (= Lesquerella 
Thlaspi montanum L. 
Cochlearia ee Banks. 
The indigenous species include the following: 
Arenaria arctica Stev. 
Aster Lamarckianus Nees (= 
culatus Lam.). 
Gnaphalium sylvaticum L. 
Antennaria carpathica R. Br. 
Senecio canus Hook. 
Hieracium vulgatum Fries. 
Crepis runcinata T. & G. 
Cassiope (Andromeda) tetragona L. 
Armeria vulgaris Wi 
Pentstemon gracilis Nutt. 
Pedicularis palustris L. 
Mertensia sibirica Don. 
Gentiana acuta Michx. 
Pleurogyne rotata Griseb, _ 
A. pani- 
1) DRumMoND, A. T.: Some statistical Features of the Flora of Ontario and Quebec. Canadian 
: 429. ; 
Naturalist new ser. I 
