I 



i 



X. 



[The names of plants described or regularly enumerated, as well as those^of natural orders, are printed in small capital». 



Synonyms, and the namea of genera and species variously mentioned, but not characterized, are in Roman.] 



I 



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1 



* 



I 



I 



i 



Abutilon pahvulum, 23. 



SonorjE, 23. 

 Texense, 23. 



Wrightii,23. 

 acacia constricta, 54. 



coulteri, 53. 



cuspidata, 54. 



Greggii; 53. 

 rce.meriana, 54. 



tephroloba, 54. 



Wrightii, 53. 



ACHILLEA MlLLEFOLIUM, 98. 



Achyropappus anthemoides, 95. 

 AcTiNELLA argentea, 96. 



BlGELOVII, 96. 

 LINEARIFOLIA, 97. 



ODORATA, 97, 



Richardsonii, 96. 



SCAPOSA, 97, 



actinoivieris longifolia, 89. 



Wrightii, 89. 

 Adenophyllum Wrightii, 92. 

 Adolphia infesta, 28, 

 Algarobia glandulosa, 51. 

 Amauria dissecta, 96. 

 Amblyolepis setigera, 96. 

 Ambrosia psilostachya, 86. 

 Ammania dentifera, 55. 



Wrightii, 55. 

 Amoreuxia palmatifida,26. 



Schiedeana, 26. 



Wrightii, 26. 



Anacardiace.e, 27. 

 Anemone Carolinxana,8, 



Anisocoma, 104. 



Anoda crenatiflora, 23. 



HASTATA, 23. 



lanccolata, 23. 

 parviflora, 23. 



X 



Weightii, 22. * 

 Aphanostephus humilis, 78. 



ramosissimus, 78. 



Aplodiscus, 80. 

 Aplofappus gracilis, 81. 



laricifolius, 80. 



ramulosus,80. 



spinulosus, 81. 

 Apodantheea undulata, 60- 

 Aquilegia ccerulea, 9. 



^ 



LEPTOCERA, 9. 



macrantha, 9. 



Aral 



pubescens, 65- 



Abaliaceje, 65. 

 Abenaria Benthamii, 18. 



DIFFUSA, 18- 



nemorosa, 18. 



SAXOSA, 18. 



Artemisia Canadensis, 98. 



dracunculoides, 98 



filifolia, 98. 

 ludoviciana, 98. 



Mexicana, 98. 



Aspicarpa hyssopifolia, 30, 



longipes, 30. 

 Asteb angustus, 76. 



BLEPHAROPHYLLUS, 77. 



caricifoh'us, 76. 



divakicatus, 76. 

 falcatus, 76. 



PL. y^R. 



15. 



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