288 



HEPOET OF THE 



variegated Milk- Asclepias variegata, L. 



F °weed avedMilk " ^- sc ^ e P ias quadrifplia, Jacq. 



Ann Arbor. 



Swamp Milkweed Asclepias incarnata, L. 



Ann Arbor ; Ft. Gratiot ; Grand Traverse Co.; S. W. (Wright). 



Butterfly-weed, Asclepias tuberosa, L. 



Pleunsv-root. , , r , ,, „ ' 



Ann Arbor ; Ft. Gratiot. 



Pleurisy -root. 



Whorled Milk- 

 weed. 



Asclepias verticillata, L. 



S. Mich. (Wright). 



Green Milkweed. Acerates viridiflora, Ell. (Asclepias lanceolata — W.) 



Ft. Gratiot ; S. W. Mich. (Wright). 



White Ash. 



•*! 



Red Ash. 



Black Ash, 

 Water Ash. 



Blue Ash. 



Fraxinus Americana, L. (F. acuminata — W.) 



Ann Arbor ; Drummond's I. ; Emmet Co. Common in the Southern Pe- 

 ninsula, but apparently less frequent northward. 



Fraxinus pubescens, L. 



Drummond's I.; S. Mich. (Wright). Comparatively rare. 



Fraxinus viridis, Michx. f. 



Ann Arbor. 



Fraxinus sambucifolia, Lam. 



Ann Arbor; Sugar I., common; Pine Lake; S. W. (Wright). 



Fraxinus quadrangulata, Michx. 



S. Mich. (Univ. Herb). The wood of the Ash is highly esteemed for its 

 strength and suppleness, especially the first and last species above. 

 The White Ash is most common and most extensively used, its an- 

 nual growths being least liable to separate into layers. It is much 

 preferable for oars, being light as well as tough when seasoned. It 

 is also extensively used by fishermen for hoops and staves, but for 

 this the Black Ash is always preferred from the greater ease with 

 which its layers are separated. 



The Black Ash is a smaller tree, and is generally found in the 

 vicinity of swamps or along streams. The value of its timber is 

 increased by the rapidity of its growth. It is tougher and more 

 elastic than the White Ash, but less durable upon exposure to the 

 vicissitudes of moisture and dryness. North of the Straits of Mack- 

 inac this is the prevailing specits. The Blue Ash is found only in 

 the southern part of the State. Its timber is prized equally with 

 that of the White Ash, for which it is substituted in many of its 

 uses. The Red Ash is a smaller tree and furnishes less valuable 

 timber. 



Wild Ginger. 



ARISTOLOCHIACEiE. 



Asarum Canadense, L. 



Ann Arbor. 



PHYTOLACCACE.fi. 



poke, scoke, Gar- Phytolacca derandra, L. 



berry ! ge ° n " S. Mich. (Wright). 



Maple-leaved 

 Goosefoot. 



CHENOPODIACE.fi. 



Chenopodium liybridum, L. 



Ann Arbor; Drummond's I. ; Mackinac. 



