348 AMARYLLIDEZ. 
88. Agave regia, Baker in Gard. Chron. n. s. viii. p. 620. 
Mexico? Hort. Kew. 
89. Agave (Manfreda) revoluta, Klotzsch in Otto & Dietr. Allg. Gart. Zeit. 
1840, p. 274; Kunth, Enum. v. p. 830; Jacobi, Vers. syst. Ord. Agav. p. 189; Baker 
in Gard. Chron. n. s. viii. p. 808; Torr. Bot. U.S. & Mex. Bound. Surv. p. 215; Proc. 
Am. Acad. Sc. xviii. p. 162. 
Mexico. Hort. Kew. 
90. Agave rigida, Miller, Dict. ed. 8; Jacobi, Vers. syst. Ord. Agav. p. 94; 
Engelm. in Trans. Acad. Sc. St. Louis, iii., reprint, p. 28; Baker in Gard. Chron. n. s. 
vill. p. 397 (varietates). 
Fourcroya rigida, Haworth, Synop. Pl. Succ. p. 74. 
Agave angustifolia, Haworth, Rev. Pl. Succ. p. 35. 
Agave elongata et A. fourcroyoides, Jacobi, Vers. syst. Ord. Agav. pp. 107 et 108. 
Agave ixtli, Karw. in Hort. Dyck. p. 304. 
Agave karwinskii, Zuce. in Nov. Act. Acad. Nat. Cur. xvi. 2, p. 677. 
Agave ixtlioides, Hook. Bot. Mag. t. 5893. 
Agave sisalana, Perrine ? ex Engelm. in Trans. Acad. Sc. St. Louis, iii., reprint, p. 28. 
Mexico. Hort. Kew. 
91. Agave rigidissima, K. Koch, Wochenschrift, 1869, p. 179; Jacobi in 
Verhandl. Schles. Gesell. 1870-71, p. 66. 
Mexico? 
92. Agave roezliana, Baker in Gard. Chron. n. s. vii. p. 528, fig. 79. 
Mexico. Hort. Kew. 
93. Agave rubescens, Salm-D. Hort. Dyck. p. 306; Kunth, Enum. v. p. 835; 
Jacobi, Vers. syst. Ord. Agav. p. 143; Baker in Gard. Chron. n. s. viii. p. 780. 
MExico. 
94. Agave rudis, Lemaire ; Jacobi, Vers. syst. Ord. Agav. p. 118; Baker in 
Gard. Chron. n. s. viii. p. 620. 
Mexico? 
95. Agave rubrocincta, Jacobi in Abhandl. Schles. Gesell. 1869, p. 153. 
MEXxIco. 
96. Agave (Littza) rupicola, Regel, Gartenflora, vii. p. 312; Jacobi, Vers. 
syst. Ord. Agav. pp. 134 et 311; Baker in Gard. Chron. n. s. viii. p. 717. 
Mexico. Hort. Kew. 
97. Agave salmdyckii, Baker in Gard. Chron. n. s. viii. p. 490. 
Agave keratto, Salm-D. in Bonplandia, 1859, p. 93 ; Jacobi, Vers. syst. Ord. Agav. pp. 127 et 249, 
non Mill. 
Mexico. Hort. Kew. 
