[ 237 ] 160 



EUPHORBIACEiE. 



Evphorhia portulacoides, (Willd.) Hills of the Upper Missouri ; June 10. 

 Euphorbia viarginata, (Pursh.) Valley of the Missouri and Upper St. i 



Peter's; June 24. f 



Eiiphofbia cyathophora, (Willd.) Sandy shore of Spirit lake, St. Peter's 



liver, <fcc. ; September IS. 

 Euphorbia maculata^ (Linn. 7) Sandy situations, valley of the Missouri ; 



June 19. 

 Euphorbia polygonifolia, (Linn. — Hook,, 1. c.) With the preceding; 



June 29. 



CALLITRICHACE^. 



Callitriche verna, (Linn.) No label. 



URTICACE^. 



Urtica gracilis^ (Ait.) Banks of Spirit lake, &c. ; September SO—-/?. 

 Urtica Cauade?ins, (Linn) Woods, Jacques river; July 10—//'. 

 Parietaria Pennsylvanica, (Muhl.) Prairies, Upper Missouri ; June 6. 

 Morus rubra, (Linn.) Woods of the Missouri, near Council Bluffs; 

 May 5— /r. 



ULMACE.E. 



Ulmvs Americana, (Linn.) Woods of the Missouri, near Platte river; 

 April 20— /r. 



AMENTACE^. 



Ostrya Virginica, (Willd.) With the preceding. 



Salix lorisfifolia, (Willd.) The commonest sandbar ; willow of the Up- 

 per Missouri ; May 22. 



Salix (undetermined.) One of the less abundant sand-bar willows of the 

 same region ; May 22— fr. 



Salix, {undeiermiued.) With the preceding ; not abundant; May 22— /r. 



Quei'cus tincforia, (Barlr.) Prairies near Council Bluffs — iiofr. 



Quercus rubra, (Linn.) Islands, Upper Mississippi — iiofr. 



Quercus macrocarpa, (M\chx.l) Prairies of the Upper Missouri — 720 fr. 

 The principal oak of the prairie region. 



Quercus rnoniana, (W^illd.) Black Snake hills, Upper Missouri — vofr. 



CONIFER.E. 



Juniperxis Virginica, (Linn.) Dry hills and ravines. Big Bend of the 

 Missouri ; June 4— /r. Hooker considers this plant as identical with 

 J. sabina of Europe. 



