STATE GEOLOGIST. 



291 



Sassafras. 



Fever-bush, 

 Spice-bush, 

 Benjamin-bush, 

 Wild Allspice. 



Leatherwood, 

 Moose-wood. 



LAURACE^E. 



Sassafras officinale, Nees. (Laurus Sassafras — W.) 



Ann Arbor. 



Benzoin odoriferum, Nees. (Laurus Benzoin — W.) 



S. Mich. (Wright) ; Ann Arbor. 



TH"^MELEACE.S. 



Dirca palustris, L. 



Ann Arbor. 



EL^EAGNACE^. 



shepherdia. • Shepherdia Canadensis, Nutt. 



Ann Arbor; Drummond's I., common about rocky shores. 



Bastard Toad- 

 flax. 



SANTALAOE^). 



Comandra umbellata, Nutt. 



Ann Arbor; Ft. Gratiot; Sand Pt., Sagin&w Bay, 18 Juno, common. C. 

 livida occurs at Cove I. , L. Huron. 



SAURURACEjE. 



Lizard's Tail. 



Shore Spurge. 

 Spotted Spurge. 



Flowering 

 Spurge. 



Three-seeded 

 Mercury. 



Saururus cernuus, L. 



S. Mich. (Wright). 



EUPHORBIACE^E. 



Euphorbia polygonifolia, L. 



S. Mich. (Wright) ; Fort Gratiot. 



Euphorbia maculata, L. 



Ann Arbor; S. W. (Wright) ; Grosse Isle, (Miss Clark) ; Ft. Gratiot. 



Euphorbia corollata, L. 



Ann Arbor. 



Euphorbia commutata, Englni. 



Ann Arbor. 



Acalypha Virginica, L. • 



Ann Arbor; S. Mich. (Wright). 



URTICACEjE. 



Slippery or Red 

 Elm. 



American or 

 White Elm. 



Corky White 

 Elm. 



Ulmus fulva, Michx. 



Ann Arbor; Emmet Co. ; Branch Lake, Antrim Co. Less common than 

 the next. 



Ulmus Americana, L. 



Ann Arbor ; Drummond's I. ; Sugar I. , large and common in the low 

 lands of this island; Antrim Co. ; Saut St. Marie, several fine native 

 specimens stand east of the town near the river. 



Ulmus racemosa, Thomas. 



Ann Arbor, in a swamp about a mile south of the city. 



The Elm prefers low grounds and rich soils. It is especially 

 flourishing at the head of Branch Lake, Antrim Co. , where the Red 

 and the White Elm were found growing large and promiscuously 

 together, the latter, however, excelling in size. 



