CONTENTS. XI 
Srupies or MexicaAN AND CenTRAL AMERICAN PLANtTs—Continued. Page. 
Apiaceae. ... 2.20... 2.202222 eee eee eee eee ee ee eee eee 301 
Anew species of Arracacia and one of Prionosciadium......--.-.-.--- 301 
Tue ALLIONIACEAE OF THE UNITED STATES, WITH NOTES ON MEXICAN SPECIES. 
By Paul ©. Standley............-.--------- +202 22-22 eee eee eee ee eee eee eee 303 
Introduction........--.2.--- 22-22-2220 2 eee eee eee eee eee eee 303 
Systematic treatment....--.-------- +--+ +--+ 22.2 eres eee ee eee eee eee 305 
THOMPSONELLA, A New GENUS OF CRASSULACEAE FROM Mexico. By N. L. 
Britton and J. N. Rose..............-2-----22---- 222222002 e ee 391 
Reprscovery or EcHEvERIA CARNICOLOR. By J. N. Rose........-.--------- 393 
New Species oF CRASSULACEAE FROM GUATEMALA. By J. N. Rose......... 395 
Repiscovery or Cereus NuprrLorus. By J. N. Rose..........-..-------- 397 
A Species or PereskraA FROM GuaTEMALA. By J. N, Rose........-..------- 399 
New Species oF Opuntia FROM ARIZONA. By J. N. Rose.....-.-.---------- 401 
EcHINOCEREUS BAILEYI, A New Cactus From OKLAHoMA. By J.N. Rose... 403 
NopaLEA LUTEA, A New Cactus From GuATEMALA. ByJ.N. Rose........-. 405 
Conzatria, A NEWGENUS OF CAESALPINIACEAE. ByJ.N. Rose...--.-------- 407 
Two New Spectres or ACACIA OF THE SERIES FinicinagE. By J. N. Rose.... 409 
A New SpLeenwort From CHina. By William R. Maxon.......------------- 411 
THe GENUS CEREUS AND Its ALLIES IN NortH America, ByN, L. Britton and 
J.N. Rose......2..22 222 eee eee 413 
Introduction..............----.--020 0222022 e eee eee eee eee 413 
Descriptions of genera with lists of species........-----------+---+-------- 414 
Species of unknown generic relationship......-..---.---------+--+-------- 435 
Five New Species oF CRASSULACEAE FROM Mexico, By J. N. Rose......-.. 439 
SupPLEMENT TO THE MonoGrapPH OF THE NortH AMERICAN UMBELLIFERAE. 
By John M. Coulter and J. N. Rose.....----------. +--+ 2+ +--+ +--+ +--+ 222 e eee 441 
Introduction.............-.-------- 2-0-2222 eee ee tee eee 441 
Bibliography......-..2...---- 22-22-2222 e eee eee eee eee 441 
Genera and species.........2-020. 02222022 eee eee ee eee eee eee eee 442 
ApoGamMy IN THE Maize Puant. By G. N. Collins..........------------+---- 453 
