490 



INDEX. 



Yards, comparison of, 362, 3S4, 3S7. 

 Yucca augustifolia, Pursh., 163. 

 rupicola, Scheele, 163. 



Zaluzania megacepliala, Scliultz Bip. 

 (?), 105. 



triloba, 105. 

 Zephyrantlies aurea, 161. 



cariuata, Herb., 161. 



Zephyrantlies concolor, Benth. 

 Hook., 161. 



pallida, R,oem., 161. 



Texana, Herb., 161. 

 Zexmenia brevifolia, Gray, 105. 



hispida. Gray, 105. 

 Zinnia acerosa, Gray, 104. 



auomala. Gray, 105. 



juniperitblia, Gray, 104. 



pauciflora, Linn., 104. 

 Zygadenus porrilblius, Greene, 166. 



volcauicus, Benth., 165. 



& 



University Press : John Wilson & Son, Cambridge. 



