Rydberg: Studies on the Rocky Mountain flora 109 



also A. porrifolia in the branched inflorescence but has shorter 

 pedicels and broader leaves. A . vaginata grew in loose rich soil 

 under overhanging canyon walls. 



Utah: Armstrong Canyon, near the Natural Bridges, August 

 4-6, 191 1, Rydberg & Garrett Q407 (type in herb. N. Y. Bot. Gard.). 



Professor Nelson gives Zygadenus gramineus Rydb. as a 

 synonym of Z. venenosus S. Wats. It is evidently Z. gramineus 

 he described, although some modification was made. Z. vene- 

 nosus is not found in Wyoming, the most eastern stations known 

 are in the Snake River Valley of western Idaho. It is charac- 

 terized by the long-clawed petals and sepals and the thick gland. 

 Professor Piper, some years ago, criticized me for redescribing Z. 

 venenosus. I think he referred to Z. intermedins Rydb. After some 

 arguments on both sides he said that he would look up Watson's 

 type. I do not know that he did, but evidently he came to the 

 same conclusion as I, for in his Flora of Washington* he limited 

 the range of Z. venenosus to "British Columbia to California" 

 and hence excluded the Rockies. I have also been criticized 

 for the same thing by Mr. M. E. Jones. Mr. Jonesf remarked: 

 ''Part of his type of Zygadenus intermedins is my No. 2091 from 

 Farmington, Utah. These specimens have no distinct sheath 

 to any of the leaves, except the basal ones. . . . This is a fair 

 sample of Rydberg's accuracy in dealing with Zygadenus. ..." 

 Turning to my original paper, J one may see that /. H. Sandberg 

 10564 is expressly designated as the type and not Jones 20QI, 

 which I included in the species. I do not know what Mr. Jones' 

 own specimens show, but there are two of Jones' specimens from 

 Farmington distributed under the number 20QI in the Columbia 

 University herbarium and in these even the tipper leaves show 

 short sheaths. One leaf attached near the middle of the stem 

 shows a sheath 1.5 cm. long. I do not think that the presence 

 or absence of a sheath on the upper part is a specific character, 

 but this as well as the citing of a wrong type shows that Mr. Jones 

 is not more accurate than I am. 



For my part, I think that Z. gramineus can not be upheld as a 



* Contr. U. S. Nat. Herb, u: 198. 1906. 

 t Contr. West. Bot. 12: 77. 26 Mr 1908. 

 X Bull. Torrey Club 27: 536. 1900. 



