254 NORTH AMERICAN FLORA [Voi.ume7 



ellipsoid, 16-23 by 19-30 ;i; wall light cinnamon-brown, 1,5-2 /x thick, moderately echinu- 

 late, the pores 3, 4, or often 5, scattered or oftentimes appearing approximately equatorial. 

 III. Telia amphigenous, scattered, roundish, equaling uredinia in size, soon naked, 

 somewhat pulverulent, chestnut-brown, ruptured epidermis not conspicuous; teliospores 

 subglobose or obovoid, 15-19 by 19-23 fx, usually rounded at both ends ; wall chestnut- 

 brown, moderately thin, about 1.5 ;u, with a minute hyaline papilla over the germ-pore, 

 densely and rather finely verrucose ; pedicel short, hyaline. 



On Fabackae : 



Aragallus albiflorus A. Nels., Colorado, Montana. 



Aragallus Lamberli (Pursh) Greene {Oxytropis Lamherti Pursh), Colorado, Kansas, 



Montana, Nebraska. 

 Aragallus sericeus (Nutt.) Greene {Oxytropis sericea Nutt.), Nebraska. 

 Astragalus amphioxus A. Gray {Xylopkacos amphioxus Rydb.), Utah. 

 Astragalus arizonicus A. Gray, Arizona. 

 Astragalus Bigelovii A. Gray, Arizona. 



Astragalus canadensis L. {^A. carolinianus ly.), Kansas, Nebraska, South Dakota. 

 Astragalus Candolleanus (H.B.K.) Sheldon {A, triflorus A. Gray, Phaca Candolleana 



H.B.K.), Arizona, Nevada. 

 Astragalus crassicarpus Nutt. {A. caryocarpusK.^r^ Geoprumnon crassicarpum Rydb.), 



Nebraska, South Dakota. 

 Astragalus Crotalariae (Benth.) A. Gray {A. oocarpus A. Gray), California. 

 Astragalus cyaneus A. Gray, Colorado. 

 1 Astragalus decumbens (Nutt.) A. Gray, Utah. 

 Astragalus eucosmus B. t. Robinson {A . elegans Sheldon not 'Bunge^, A telophragma elegans 



Rydb., Phaca elegans Hoo^.), Colorado. 

 Astragalus glareosus Dougl. {A. argophyllus Nutt.), Idaho. 

 Astragalus Hornii K. Gray, California. 

 Astragalus Humboldtii A. Gray, Chihuahua. 

 Astragalus lentiginosus Dougl., Nevada. 



Astragalus lepiocarpus T. & G. {Hamosa leptocarpa Rydb.), Texas. 

 Astragalus leucopsis Torr., California. 

 Astragalus Menziesii A. Gray, California. 



Astragalus mollissimus Torr., Colorado, Kansas, Nebraska, Texas. 

 Astragalus nebraskensis Bates, Nebraska. 



Astragalus niiidus Dougl. {A. adsurgens Hook, not Pall.), Montana, Nebraska. 

 Astragalus Preussii A. Gray, California. 



Astragalus Purshii Dougl. {Xylopkacos Purs kit 'Rydb.), California, Utah. 

 Astragalus pycnostacky us A. Gray, California. 

 Astragalus sulphurescens Rydb., Colorado. 



Astragalus tennesseensis A. Gray [Geoprumnon tennesseense Rydb.), Tennessee. 

 Astragalus Thurberi A. Gray, Arizona. 

 Astragalus Tracy i Greene, Texas. 

 Astragalus uintensis M. E. Jones {Xylopkacos uiniensis Rydb.), Colorado. 



Astragalus utakensis T. & G., Idaho, Utah. 

 Astragalus Wardii A. Gray, Utah. 

 Type locality : Breslau, Germany, on Astragalus glycopkyllus. 



Distribution : Montana and South Dakota southward into northern Mexico, westward to the 

 Pacific coast, and in one locality in Tennessee ; also in Europe and northern Africa. 



Illustrations: Centr. Bakt. II. Abth. 11: 791,/. I-VIII; Beitr. Krypt. Schweiz 2^ : /. 25. 

 ExsicCATi : Clements, Crypt. Form. Colo. 605 ; ElHs & Ev. Fungi Columb. 1990, 2092; Barth. 

 Fungi Columb. 2391,3494; Barth. N. Am. Ured. 84; Ellis & Ev. N. Am. Fungi 2257 ; Sydow, 

 Ured. 1752, 1753, 2000; Carleton, Ured. Am. 47 ; Garrett, Fungi Utah. 146, 195. 



59. Nigredo fallens (Desmaz.) Arthur. 



Uredo fallens Desmaz. PI. Crypt. 1325. 1843. 

 Trichobasis fallens Cooke, Jour. Bot. 4 : 105. 1866. 

 Uromyces fallens Kern, Phytopathology 1 : 6. 1911. 



O and I. Pycnia and aecia uncertain. 



II. Uredinia chiefly hypophyllous, scattered, rather early naked, roundish or oval, 

 0.3-0.8 mm. in diameter, pulverulent, pale cinnamon-brown, ruptured epidermis con- 

 spicuous ; urediniospores broadly ellipsoid or obovate- ellipsoid, 19-23 by 22-26 \i ; wall light 

 cinnamon-brown, 1.5-2 ^ thick, rather sparsely echinulate, the pores 4-6, scattered. 



III. Telia chiefly hypophyllous, scattered, rather tardily naked, roundish or oval, 

 0.3-0.8 mm. in diameter, somewhat pulverulent, dark cinnamon -brown, ruptured epidermis 

 conspicuous; teliospores broadly ellipsoid or obovoid, 16-20 by 20-27 m; wall cinnamon- 

 brown, moderately thick, 1,5-2 /z, often with an inconspicuous hyaline papilla over the 

 germ-pore, smooth, or more usually with a few irregularly scattered, roundish warts; 

 pedicel short, hyaline, deciduous. 



