62 ERYTHEA. 



Aragallus monticolus (Gray) Greene, 1. c. OxytropU man- 

 ticola Gray, 1. c. Young plants of this species are not always 

 readily separated from immature specimens of A. lagopus, but 

 in fruit they are distinct enough. In general the latter is a 

 smaller, more tufted and spreading plant, and more loosely silky- 

 villous. It is of the plains, while A. monticolus occurs in the 

 mountains and foot-hills. Specimens seem to bear out the statement 

 that the flowers are either violet-purple or ochroleucus. Specimens 

 examined: Nos. 4321, Laramie Hills, May 21, 1898, and 4924 

 Seminole Mountains, July 21, 1898 (both by Elias Nelson); Custer 

 Mont., June 7, 1890, No. 152, by J. W. Blankinship. 



Aragallus Lamberti (Pursh) Greene, 1. c. Oxytropis Lamr 

 b&rti Pursh, Sims, Bot. Mag. t. 2148. To this well-known species it 

 seems probable that too wide a range has been ascribed, owing to 

 the inclusion under this name of some other species. Northern 

 Kansas, Nebraska, Minnesota, the Dakotas, Montana, and eastern 

 Wyoming and Colorado will, I think, be found to furnish most of 

 the authentic specimens of this species. The original descriptions 

 very properly excluded all but the purple or violet flowered forms, 

 for it will be found that those of other colors have recognizable 

 specific characters in the field if not in the herbarium (see notes to 

 A. albijlonis below). What I take to be typical A. Lamberti is 

 represented by ray Nos. as follows: 1320, Laramie Hills, near 

 Table Mountain, July 1, 1895; 3247, Green Top, June 29, and 

 3322, Little Laramie River, July 4, 1897. 



Aragallus Lamberti sericea (Nutt.). A. serieea (Nutt.) 

 Greene, 1. c. Oxytropis Lamberti sericea Gray, 1. c. Eastern 

 Wyoming and the whole eastern base of the Rocky Mountains is 

 the range ascribed to this plant. In several specimens before me, 

 by various collectors, I am unable to detect characters that will 

 satisfactorily separate it from the foregoing. Its slightly broader 

 leaflets which are inclined to differ on the primary and the later 

 leaves, the greater silkiness (and this varies greatly) and the some- 

 what more robust spike are the differences to which attention is 

 drawn. 



Aragallus albiflorus. Oxytropis Lamberti ochroleuca Aven 

 Nelson, First Rep. Fl. Wyo. 98. Root large and deep-set: multi- 

 cipital caudex a rounded tuft of short, close-set branches which are 



