160 CONTRIBUTIONS TO WESTERN BOTANY NO. li 



the term elevations is meant to cover not actual elevations as much as 

 relative ones, that is, plants of the Lower Temperate life zone represent 

 the lower elevations: Plants of the Middle Temperate life zone represent 

 the middle elevations and plants of the Uppr Temperate life zone repre- 

 sent the high elevations. At the far south yellow flowered forms occur in 

 the lower edge of the Middle Temperate life zone in the Sierra Madres 

 of Chihuahua, such as A. Skinneri and chrysantha, 



Aquilagia Laramiensis is flavescens, oreophila is caerulea, caulifax is 

 formosa, elegantula is formosa, pallens is a form of caerulea, rubrocincta 

 is formosa and so is tritemata and lithophila. Tracyi is truncata, 

 Wawensis is formosa and so are pauciflora and Coliunbiana. As I Jiave 

 stated previously Waston erred in stating what was his type of A. fla- 

 vescens. His actual type was the high altitude form which is a hybrid 

 between the actual A. flavescens and caerulea. What should have been 

 his type was his No. 36, which he referred to Jiis species as a high alti- 

 tude form, and which I have taken as the type of my A. depaupcrata, 

 which plant is not a high altitude form at all, but which he got in what 

 is now called Pleasant Valley in City Creek canon, Salt Lake City, at an 

 elevation of about 6,000 feet above tjie sea. He gives his elevations as 

 5.000 to 7,000 feet altitude, but was mistaken in saying that any Aqui- 

 legia grows at 5,000 feet altitude, I have gone all over the region with a 

 barometer and know there is no such elevationwhere the plant grows. I 

 think that about the only way to settle the name is to use it as a hybrid 

 or to drop it altogether. On the contrary truly typical material is wide- 

 sp^ad in Idaho and corresponds well with Jiis Wasatch form, which 

 surely is a hybrid there, but the Idaho material cannot be a hybrid in 

 Idaho. It is rather unique that Payson in his monograph reduces my 

 depaoerata and keeps ug Lar 





