lentiginosum (Dougl.) Ryd. Torr. Bull. 40 50 (1913) is A, len- 

 tiginosus. 



40 50 (1913) is A. lentiginosus var. 

 platytropis (Gray) Rydberg Torr. Bull. 40 50 (1913) is A. platy- 

 tropis Gr. 

 Death Valley Region p. 53. 

 Debiles p. 87. 



DeCandolle's Revision p. 8. 

 Didymocarpi pp. 9, 283. 

 Diholcos Rydberg Torr. Bull. 32 G64 (1905) p. 16. 



bisulcatus (Hook.) Rydberg Torr. Bull. 32 664 (1905) is A. bisul- 



catus. 

 decalvans (Gandoger) Rydberg Torr. Bull. 32 664 (1905) is A. 



bisulcatus. 

 Haydenianus (Gray) Rydberg Torr. Bull. 32 664 (1905) is A. 



Haydenianus. 

 scobinatulus (Sheldon) Rydberg Torr. Bull. 40 51 (1913) is A. 

 Haydenianus. 

 Diphysi p. 9. 

 Dispermus p. 14. 



Dissitiflori p. 8. • , 



Eastern and Atlantic Region pp. 37, 39. 

 Eastern Great Basin Region pp. 38, 39, 44. 

 East Humboldt Region p. 46. 

 Ecology p. 28. 



Effects of Ecological Factors p. 55. 

 Eremiticus p. 14. 

 Eriocarpi p. 11. 

 Euastragalus p. 13. 

 Famelicus p. 13. 

 Flexuosi pp. 11, 192. 

 Galegiformes pp. 8, 10, 246. 

 Generic Segragation p. 15. 

 Genetic Relationship p. 27. 

 Gila Region p. 54. 



Geoprumnon Rydberg, Small's Flora S. E. U. S. 616 (1903) p. 16. 

 crassicarpum (Nutt.) Rydberg in Small's Fl. S. E. U. S. 616 (1903) 



is A. crassicarpus. 

 Mexicanum (DC.) Rydberg in Small's Fl. S. E. U. S. 616 (1903) is 



A. Mexicanus. 

 pachycarpum (T. & G.) Rydberg in Small's Fl. S. E. U. S. 616 



(1903) is A. crassicarpus. 

 Plattense (Nutt.) Rydberg in Small's Fl. S. E. U. S. 015 (1903) 



is A. Plattensis. 

 succulcntum (Rich.) Rydberg Torr. Bull. 32 658 (1905) is A. 



crassicarpus. 

 Tennessecnse (Gray) Rydberg in Small's Fl. S. E. U. S. 616 (1903) 

 is A. Tcnncsseensis. 

 Green River Basin pp. 39, 43. 

 Group Details p. IS. 

 Hamosa Medic in Vorles Churpf. Phys. Ges. 2 376 (1787). 



atrata (Watson) Rydbeg Torr. Bull. 34 48 (1907) is A. atratus. 

 austrina Rydberg in Small's Fl. S. E. U. S. 618, 1232 (1903) is 



A. Nuttallianus. 

 atratiformis Rydberg Torr. Bull. 34 48 (1907) is A. straturensis 



Jones, 

 calycosa (Torr.) Rydberg Ton-. Bull. 40 50 (1913) is A. calycosus. 

 leptocarpa (T. & G.) Rydberg in Small's Fl. S. E. J. S. 017 (I'JO ,') 



is A. leptocarpus. 

 Lindheimeri (Eng.) Rydberg in Fmall's Fl. S. E. U. S. 017 (11)0 ]) 



is A. Lindheimeri. 

 macilenta Rydberg in Small's Fl. S. E. U. S. 617 (1903) is A. 

 leptocarpus. 



