INDEX OF GENERA. , 
[Pages of principal entries in heavy-faced type. 
Acanthocereus ..........-...2---.-------0-- 432 
AMM... 2.2... eee eee eee eee cece 444 
Angelica 2.0.00. ...... 20 ccc cece eee eee eee eee 446 
Aporocactus ...........0.2..2. 00.2222 434, 435 
Aulospermum ............202.2..-2.- 2220000 446 | 
Bergerocactus ..........20.....2.2..22222-6- 435 
Bupleurum .............2....0002 cee eee eee 443 | 
Cactus ........-.. te.e- 415, 417, 418, 419, 420, 434, 436 | 
CaruMm ....... 2222.2 222 eee eee ee eee eee eee 443, 
Cephalocereus ..........-22...22..-4- 413, 415-420 
Cereus ...........202.20- 413, 414, 415-437, 436, 437 
Chaerophyllum..... ‘Lee cee cece cece eee 442,443 | 
Cleistocactus ..................-22...020202. 413 
Cogswellia..........-2...22...--- SAS-451, 449-451 
Conioselinum ......-...2-. 200 eeeeeeeeeeee 446, 446 
CUustchid: . 0.00.2. eee eee 448 
Cymopterus ..........2... 22222002 e eee eee 446,447 | 
Discopleurd. ... 02020222 cece ee eee cece eeeeeee 444 | 
Echeverria ...--. 02-22-0222. e eee eee eee e eee 439 
Echinocactus..............2.222 22220 eee eee 425 
Echinocereus ..... -.----.--. 418, 424, 434, 435, 435 
Eryngium .............2-2-.22 2.2222 ee eee 442 
Eseontria ....2-....--- 2-2-2222 e eee eee eee eee 420 
Eulychnia............-....--2 22002222 ee eeee 413 
Ferula .. 2.20222 eee eee eee 449 
Harperella ...........22...2...22.2202 2 eee 444 
TTArperid. ..2 eee ee eens 444 
Harrisia.........222-.-02220 002200 e eee eee ee 422, 423 
Heliocereus...--....2...22.-2 20220022008 433, 434 
Hydrocotyle..... 02... eee ee ences 442 
Hylocereus ............ 000.2 cece eee eee 428, 429 
Lemaireocereus. .....-.....-... 2.020000 424-496 
Leptocereus ........02 2000s cece ee eee eee e enon 433 
Leptotaenia ...............22.-200.-22 2220+ 448 
Synonyms in italics. ] 
Ligusticella ...............0..222 2 eee e ee eee 445 
Ligusticum ...................022002 0 eee 45,45, 46 
Lomatia ....2..........-022.200052020000- 0 cee ee 448 
Tomatiwin 0.200000. ee ee ee eee 448-451 
Lophocereus........-.....2...2--.220000- 426, 427 
Musineon ...............2222200000 eee ee ee 443 
Myrtillocactus ..........2.....22.2.200200-- 427 
Nyctocereus ...........2022.22.02..2220.. 423, 424 
Orumbella..................2022.2.002--- 445, 446 
OSMOTNIZA 0... eee eee 443 
Pachycereus .........-.....2...00220.00-- 420-422 
Peniocereus........... 2.0020. e cece eee eens 428 
PeUcedaQnum .. 2... c eee cee eee ee ee 449, 450 
Phellopterus ............-2--22.22..22020005 446 
Pilocercus..................-- ALS-421, 424, 427, 487 
Pleiotaenia ................020.0.0 0002 e eee 447,448 
POLYLAENAD ©. eee ee ee eee eee 447,448 
Polytaenium ..........2......2...2220000- 447 
Pseudocymopterus................2..2--- 447, 447 
Pseudotaenidia -................2220.0222-- 448 
Ptilimnium......................22..02-. 444, 445 
Rathbunia..................222.22222.--- 414, 415 
Rhipsalis .........0 2.20200 e eee eee eee eee 431 
Sanicula. ........2....0.....2 02 cee eee e eee 442 
Sedum ............0..... 20.22 e eee eee eee 440 
Selenicereus............0.......2222000-- 429-431 
Villadia.......200 2... eee 440 
Washingtonia........22...02...002....0000. 443 
Weberocactus .........22....022..22000-- 431, 432 
Werckleocereus ............222002 222022 eee 432 
Wilcoxia... 02... ee eee ee eee eee 484 
LOA 202. ee eee eee eee 453 
Zizia .... 2202. eee eee eee eee ee 443 
