102 THE AMERICAN BOTANIST 



tical this is far beyond the credited range of the Idaho plant. 

 The petals are so deeply emarginate as to make the flower seem 

 8-parted. The flowers open at dawn and close before midday. 

 The moist spots in the desert are nearly always inhabited by 

 species of primroses of many dififerent forms which apparent- 

 ly are in need of more careful study. 102. 



Anogra pallida (Lindl.) A species of evening primrose 

 with white flowers that turn pink as the blossoms age, is very 

 abundant in many places in the desert. The plant at Tuba was 

 not collected but it is assumed to be this species. 



Berula erccta (Huds.) An abundant umbellifer of no par- 

 ticular beauty in all wet grounds. 108, 



Forestiera Arizonica (Gray). A curious shrub belonging 

 to the olive family is common in various places about the oasis. 

 This was originally described as a variety of F. Neomexicana, 

 but Dr. Rydberg regards it of specific rank. It has seldom 

 been collected. There is only a duplicate of the original type 

 at the New York Botanical Garden. 118. 



Centaureiun Arizonicum (A. Gray). Centuary. This 

 plant, with flowers like small pink sabbatias, was common in 

 many moist places about the oasis. 58. 



Apocynum cannabinum L. Indian hemp. The Indian 

 hemp is used by the Indians for .various purposes and large 

 thickets of it were found in many places where its growth is 

 doubtless promoted. The specimens exhibit certain differen- 

 ces from the plant of the same name in the eastern part of the 

 country. 87. 



Dodecatheon sp? Shooting-star. Specimens which un- 

 mistakably belong to a species oiDodecatlieon were found in 

 fruit on a springy bank. They were not further identified. 



Asclepias speciosa Torr. Showy Milkweed. One of the 

 finest plants of its genus, with large purplish flowers. Or- 



