1898.] NATURAL SCIENCES OF PHILADELPHIA. 311 



men in a box to Captain Stoddard at St. Louis, and this box started 

 from Fort Mandan April 7, 1805. 



Euphorbia heterophylla L. E. cyathophora Pursh, Fl. 605, nee Willd. 



October £, 1804- On the Missouri, above Big Cheyenne River, 

 and nearing Little Cheyenne River. 



Euphorbia marginata Pursb, FI. 607. 



July 28, 1806. " On the Yellowstone River, M. Lewis." This is 

 impossible, because Lewis was never on the Yellowstone, though he 

 passed its mouth twice ; and at the date said he was on the Missouri 

 above Maria's River, at the Cracon du Nez or Grog Spring, in the 

 vicinity of Fort Benton. Clark was on the Yellowstone at this date, 

 below the mouth of the Bighorn, and above the mouth of Tongue 

 River. 



Madura aurantiaoa. 



(No label.) 

 Betula 1 i. e. Alnus rubra. 



March 26, 1806. Lower Columbia River, between Puget's Island 

 and Cowlitz River. I am pleased to find Mr. Meehan confirming 

 the identification of the black alder several times mentioned by L. 

 & C. and given in my edition as Alnus rubra, p. 698, p. 724, p. 749, 

 p. 833, p. 911. 



Quercus garryana Dougl. 



March 26, 1806. Same place as last said. 

 Quercus macrocarpa depressa Englm. 



September 5, 1801/.. From the Niobrara River, where L. & C. 

 camped on the 4th (not on the 5th), upward. The " White Point " 

 Creek which Mr. Meehan cites in this connection is the White Paint 

 Creek of L. and C, now known as Bazile Creek, which falls into the 

 Missouri next below the Niobrara and on the same side. The date 

 on which L. and C. described this tree particularly is the 16th, not 

 15th, as cited by Mr. Meehan ; they were then camped a short dis- 

 tance above White River, one mile above their Corvus Creek, now 

 known as American Crow Creek. This oak is the one malidentified 

 by Mr. Knowlton in my edition, p. 119, as Q. undulatavar.wrighti, 

 and first referred to Q. macrocarpa by Prof. Sargent, Garden and 

 Forest, No. 465, January 20, 1897, p. 28 — a masterly criticism of the 

 way all the L. & C. trees were handled in my work, and one for 

 which I am profoundly grateful to its distinguished author. 



