ILLUSTRATIONS. 



im.a ras. 



Facin \ 



Pl ate I. Festuca confusa Piper Frontispiece. 



II. Festuca < riolepis I >esv 14 



III. Festuca grayi (Abrams) Piper 14 



IV. Festuca refiexa Bu<-kl 15 



V. Festuca megalura Nutt 17 



VI. F> stuca }>r<>in<,i<h .< I Is 



VII. F( .<t"<;i sciurea Nutt 10 



VIII. Festuca occidentalis Hex »k 24 



IX. Ftstiira howellii Vasey 31 



X. /•" .</>"y/ aristulata (Torr. ) Shear 32 



XI. Festuca thurberi Vasey 



XII. Festuca johnsoni Vasey 35 



XIII. Festuca subuUflora Scribner 36 



XIV. Festuca i Imeri Scribn. £ Merrill 37 



XV. Festuca confin is Vasey 41 



XVI. Echinocactus r<>l,u.<tn.-< Link & < ) 1 1 « » and Mamillaria angidaris 



Link & Otto 83 



XVII. Opuntia tunicata Link & Otto and Echinocactus ingens Zucc 83 



XVIII. Pilocereu* fulvim ps Weber 



XIX. Cereus hollianus Coulter 83 



XX. ( ereus itellatus Pfeiffer 



XXI. ( i r< us weberi Coulter ^4 



XXII. Fouquieria spinosa H. B. K 85 



XXIII. Beaucarru a oedipus Rose 88 



XXIV. Calibanus caespiiosus ( Scheidw. ) Rose 



XXV. Calibanus caespiiosus (Scheidw. ) Rose 90 



XXVI. PoU niilla lozani Rose & Painter 95 



XXVII. Alchemilla procumbens Rose 



X X VIII. Pithecolobium r< volutum Rose 96 



XXIX. Hoffmansi ggia arida Hose 



XXX Benthamantha pumila Rose 99 



XXXI. Cologania tenuis Rose LOO 



XXXII. Odonia incana Rose 102 



XXXIII. Odonia viridfflora Rose 103 



XXXIV. Sphinctospermum constrictum (S.Wats. Rose 107 



XXXV. Ionoxalis confusa Rose, T.furcaia Rose, and Ljaliscana Rose 110 



\XXVI. Terebinthus arida Rose 118 



X X XVII. Polygala calcicola Rose 1 l'"J 



XXXVIII. Polygala nelsoni Rose 122 



XXXIX. Polygala turgida Rose 123 



