CONTENTS. 
Introductory notes ...........-.-- ee ee eee eee eee eee 
Cycadaceae .....22222222222 22 ee ee eee ee eee 
A new species of Dioon ...........-..-..22--2--- 20-22-2222 eee eee ee eee eee 
Gnetaceae -... 22.20.2002 2 222 eee eee ee beeen cece eens 
A new species of Ephedra ....-....-2....2.2.0.2 222-220-2222 e eee ee ee 
Liliaceae ...2..2. 2222-222 ee eee eee 
A new species of Beaucarnea.._.-...-.2...--2.2-0-- 22200222 e ee eee eee ee 
A new species of Beschorneria -...-........-...-...--.-.--------------- 
Rafflesiaceae .. 2... ...-- 22.2222 ee ee eee 
A new Aquilegia from the high mountains.........-.....-2...---2.----- 
Capparidaceae ....-.---22. 22-222 e ee eee eee eee eee eee eee 
Two new species of Cassia.................2---2--2----------------- eee 
A new species and two changes of name in Chamaecrista....-.......---- 
Viclaceae .. 2.22 eee eee eee 
Five new species of Brongniartia................-.--.-..-------------- 
New species and new combinations under Cracca........-----.--------. 
Three new species of Diphysa.-.-- wee cece cee eee ee eee cece eee eee eee 
New species and new combinations in Parosela............-..-..------- 
Miscellancous new species _.........-..-------- 220-2 e cee eee eee ee eeee- 
Linaceae. 2.20.22 ee eee ee ee eee 
A new species of Linum _.....-..-..-..---.--------------------------- 
Rutaceae .....222 2220222222222 eee eee eee 
The genus Morkillia............2......--2.--------------------------- 
The Mexican species of Ptelea -............--------------------------- 
The species of Taravalia ......22..........-.-.-----.------------------ 
Simarubaceae .-....-.-------------------. ------ 2-0-2 
The Mexican species of Castela.............--..----..----------------- 
Additional species of Terebinthus ..................-.----------------- 
Malpighiaceae.. 2.2.2.2... eee ee eee eee ee eee eee eee 
Neopringlea and its two species. ...........---.------------------------ 
Two new species of Wimmeria --.......------------------------------- 
Rhamnaceae .....---------------------- eee eee eee 
