170 MINNESOTA BOTANICAL STUDIES. 



striate, racemosely six to sixteen flowered; flowers 13 to 1(3 mm. 

 in length, loosely spreading; calyx cylindrical, the slender- 

 subulate teeth one-third to one-half the length of the tube; 

 coi'olla ochroleucous, tinged with purple; legume 10 to 14 mm. in 

 length, coriaceous, glabrous, sessile, ovate, slightly arcuate, 

 strongly obcompressed, bilocular, few to many seeded. 



Collected among rock debris near the top of Walnut canon, 

 near Flagstaff, Arizona, June, 1891, by D. T. MacDougal; also 

 at Bougharts Ranch, Arizona, June, 1893, in flower only by 

 Henry H. Kasby. 



This species has heretofore been referred to Astragalus 

 diphysus Gray, and Astragalus lentiginosus Dougl. It may 

 be considered as intermediate between the former and Astrag- 

 alus fremontii T. and G. 



The type specimen is in the Herbarium of the Minnesota 

 Geological and Natural History Survey, having been distrib- 

 uted by the U. S. National Herbarium as Astragalus dij^hysus 

 A. Gray. The species is named for the collector, Mr. D. T. 

 Macdougal of the University of Minnesota. 



Astragalus lentiginosus Dougl. in G. Don. Gen. Syst. 

 Gard. and Bot. 2 : 257. 1832. 



A. lentiginosus Dougl. var. floribundus A. Gray. Proc. Am. 



Acad. «: 524. 1866. 

 Tragacantha lentiginosa OK. Eev. Gen. PI. 2: 946. 1891. 



British Columbia, Washington, Oregon, Nevada and Cali- 

 fornia. 



Astragalus araneosus n. sp. 



Perennial, glabrous throughout or slighty pubescent when 

 young; stems 1.5 to 3.4 dm. high, erect, very finely striate, 

 simple, ten to many from a thick root; leaves 5 to 7 mm. in 

 length, rachis slightly winged, not channelled or but slightly 

 so; leaflets 7 to 10 mm. in length, in seven or eight pairs, 

 fleshy, orbicular or obcordate, obtuse, retuse or emarginate; 

 stipules deltoid- acuminate, semi- sheathing below, reflexed; 

 peduncles 6 to 9 mm. in length, striate, capitately or subspi- 

 cately ten to twelve flowered; flowers 12 to 15 mm. in length, 

 erect- spreading or horizontal; calyx short-cylindrical, with a 

 few scattered, blackish hairs, the linear-spreading teeth one- 

 third to one-half the length of the tube; coro/Za whitish, tipped 

 with purple; legume 2.5 to 3.5 cm. in length, coriaceous, glab- 

 rous, minutely reticulated, sessile, ovate-lanceolate, arcuate- 



