WOOTON AND STANDLEY FLOKA OF NEW MEXICO. 367 



The number of leaflets and the degree of prolongation of the rachia vary considerably, 

 even on the same plant. It ia doubtful if any of the New Mexican material belongs 

 to the typical Phaca picta as originally described by Gray, and some of the specimens 

 from the western part of the State approach Phaca longifolia (Pursh) Nutt. 



39. Astragalus thurberi A. Gray, Mem. Amer. Acad. n. ser. 5: 312. 1854. 

 Type locality: "Near Fronteraa, &c, Sonora; on dry jjlaina." 

 Range: Southern New Mexico and Arizona and adjacent Mexico. 



New Mexico: Below Silver City; Dog Spring. Upper Sonoran Zone. 



40. Astragalus ■wootoni Sheld. Minn. Bot. Stud. 9: 138. 1894. 



Astragalus trifiorus A. Gray, PI. Wright. 2: 45. 1853, at least in part, not Phaca tri- 

 Jlora DC. 



Astragalus play anics Jones, Contr. West. Bot. 8: 6. 1898. 



Type locality: Near Las Cruces, New Mexico. Type collected by Wooton. 



Range: Western Texas to southern Arizona and adjacent Mexico. 



New Mexico: Mountains west of San Antonio; Cactus Flat; Paraje; Mesilla Valley; 

 Carrizalillo Mountains. Valleys and low flats, in the Lower Sonoran Zone. 



The original description of this plant is incorrect in calling it a perennial, for it is 

 an annual. It is similar in general appearance (in pressed specimens) to A. allochroiis, 

 which occurs in the same region, but the latter is a short-lived perennial and a larger 

 plant with larger bluish purple flowers and somewhat larger pods. The flowers of 

 A. wootoni are reddish purple and generally small. It is a member of the rather 

 scanty spring flora of the region and is usually gone by the middle of the summer. 

 It would seem to be closely related to A. geyeri, a plant with a more northerly dis- 

 tribution and with paler flowers. 



41. Astragalus aUochxous A. Gray, Proc. Amer. Acad. 13: 366. 1878. 

 Astragalus trifiorus A. Gray, PI. Wright. 2: 45. 1853, in part. 



Type locality: Near Wickenburg, Arizona. 



Range: Utah and Colorado to Arizona, western Texas, and adjacent Mexico. 



New Mexico: Horse S^Dring; Zuni Reserv^ation; Cactus Flat; Kingston; Mangaa 

 Springs; plains south of the White Sands; foothills of Organ Mountains; Rio Gila 

 near Redrock; east of Hacliita; Albuquerque. Dry hills, in the Upper Sonoran Zone. 



This is evidently the plant Doctor Rydberg cites as Phaca candolleana H. B. K. 

 in the Flora of Colorado, ^ and that may be the proper name for the species. We are 

 inclined to doubt such an extended range, however, and retain the later name for 

 the plant of the United States. 



42. Astragalus subcinereus A. Gray, Proc. Amer. Acad. 13: 366. 1878. 

 Type locality: Mokiak Pass, northwestern Arizona. 



Range: Arizona and Utah to wes3tern New Mexico. 

 New Mexico: Northwestern corner of the State. 



The fruit is strikingly like that figured for Phaca candolleana by the authors of that 

 species. We are not acquainted with it in the field. 



43. Astragalus gilensis Greene, Bull. Torrey Club 8: 97. 1881. 



Type locality: On a high summit at the mouth of the canyon of the Gila River, 

 New Mexico. Type collected by Greene. 



Range: Mountains of western New Mexico. 



New Mexico: Mogollon Mountains; Hillsboro. Transition Zone. 



Mr. Jones'a statements^ that the pods are " tliin-chartaceous " and "flattened 

 laterally" do not agree with Doctor Greene's original description nor with the New 

 Mexican specimens. 



1 Colo. Agr. Exp. Sta. Bull. 100: 211. 1906. ^ ^oe 4: 27. 1893. 



