BEAL ON MICHIGAN FLORA. 21 



Trillium erectum L. Wake Robin. 



Trillium undulatum Willd. Painted Wake-Robin. 



(Trillium erytJirocarpum Michx.) 



PL.\NTS SUPPOSED TO HAVE IMMIGRATED FROM THE NORTH AND WEST. 



Adenocaulon bicolor Hook. 



Anemone parviflora Michx. Anemone. 



Artemisia gnaphalodes Nutt. Mugwort. 



(Artemisia Ludoviciana gnaphalodes T. & G.) 



Brauneria pallida (Nutt.) Britton. Purple Cone-flower. 



(Echinacea angustifolia DC.) 



Bromus breviaristatus (Hook.) Buckl. Brome Grass. 



Castilleja acuminata (Pursh) Spreng. Painted-cup. 



(CastiUeja pallida septentrionalis A. Gray.) 



Drosera linearis Goldie. Sundew. 



Euphorbia serpyllifolia Pers. Spurge. 



Iva xanthiifolia (Fresen.) Nutt. Marsh Elder. 



Lonicera involucrata (Richards) Banks. Honeysuckle. 



Mertensia paniculata (Ait.) G. Don. Lungwort. 



Mimulus Jamesii T. & G. Monkey-finower. 



Mimulus moschatus Dougl. Musk-flower. 



Panicularia pallida (Torr.) Kuntze. 



(Glyceria pallida Trin.) 



Roripa obtusa (Nutt.) Britton. 



(Nasturtium obtusum Nutt.) 



Parnassia palustris L. Grass of Parnassus. 



Parnassia parviflora DC. Grass of Parnassus. 



Phacelia Franklinii (R. Br.) Gray. 



Polygonum lapathifolium incanum (Schmidt) Koch. Knotweed. 



Potentilla Robbinsiana Oakes. 



(Potentilla frigida A. Gray.) 



Ranunculus reptans intei-medius (Hook.) T. & G. Creeping Spearwort. 



{Ranunculus Flammula ititermedius Hook.) 



Rosa Engelmanni Watson. Rose. 



Rosa Sayi Schwein. Rose. 



Rumex salicifolius Weinm. White Dock. 



Sorbus sambucifolia (C. & S.) Roem. Western Mountain Ash. 



(Pyrus samhucifolia Cham. & Schlecht.) 



Symphoricarpos occidentalis Hook. Wolfberry. 



TREES OF MICHIGAN COMPARED WITH THOSE OF EUROPE, 



Michigan is very rich in trees. If we have counted correctly there are 

 90 species of indigenous trees and three exotics which have escaped from 

 cultivation. 



To comprehend the relative importance of our trees, let us glance at 

 the forests of Great Britain. Great Britain and Ireland contain 121,260 

 square miles of land, Michigan 60,000, a little less than one-half as much 

 as Great Britain. She has one species of basswood not so good as ours ; 

 one maple not over twenty feet high ; one cherry from ten to twenty feet 

 high ; one small ash, two elms, two poplars, one beech, which grows very 

 large but not very high ; one small white birch, one species of pine, by 

 no means a match for our white pine; a species of oak which sometimes 

 grows to a great size. 



Great Britain has about ten species of trees native to her soil. Michigan, 

 with half the territory, has eighty-five species. Great Britain has no 

 whitewood^ no white or red cedar, no walnuts or hickories. Michigan has 

 six species of maple of tree size, a basswood, a whitewood, honey locust, 

 Kentucky coffee tree, three cherries, a pepperidge, five species of ash, a 



