Vill CONTENTS. 
Economic Piants or Porro Rico. By O. F. Cook and G. N. Collins...... 
Introduction...............2.02.22. 22002002202 
Economic plants imperfectly known...............-.2.2..-.222----- 
Materials included and arrangement of list.............22.022....2-.. 
Misplaced common names ........-..2.--.-2222-.-2-20002002 02 eens eee 
References to botanical literature .............0..22.02.222--202----- 
Books on Porto Rican plants................2..0.22.22222--202---2--- 
Personal field work, acknowledgments, and desideratum.............. 
Catalogue of economic plants of Porto Rico..............2...2..2.--.----- 
A STUDY OF CERTAIN MEXICAN AND GUATEMALAN SPECIES OF PoLypopiuM. 
By William R. Maxon. .............000.0 202000002222 eee eee eee eee 
StuDIES OF MEXICAN AND CENTRAL AMERICAN PLANTS—No. 4. ByJ.N. Rose. 
Introductory notes. .......22. 02020000 e eee eee eeeee 
Poaceae. . 2.2.2... 2.22 eee eee eee 
Some grasses from Popocatepetl...............2..22.2022-2-2-20220--- 
Cyperaceae. 0.22... eee cece neces 
Notes on Carex madrensis and the Carer pinetorwm of Liebmann...... 
Betulaceae.. 2.0.2.0. eee eee eee 
Notes on Ostrya, with two new species....................-2-22------ 
Brassicaceae... 2.20.0... 20222 cence e eee. 
A new genus, Ornithocarpa...........20020.00.2.002..22..-2-------- 
Three species of old genera........ 00000000002 oe eee ee 
Crassulaceae.. 2.2.22... 22 eee eee 
Two new species of Echeveria................0.0..2.2.200022--000000-- 
Grossulariaceae. 2.2.2.2... eee eee peeeeee 
A synopsis of the Mexican species of Ribes...........20.0...2..2----- 
Mimosaceae...........02. 202222 eee eee eee cece eeeeee 
A new species and a new name............0...00222-0222220 202 e eee 
Caesalpiniaceae.... 2.2.2... 2 202 ee 
Three new species of Cercidium...............0..2.20..202. 000-222 --- 
New name for a Cassia..... 2.002220 0 00000002 eee eee 
Viciaceae............2..22-2--- 
The pediceled species of Parosela in Mexico 
A fascicle of new lupines.... 
Four new species of Indigofera 
Three new species of Phaseolus 
New species of several genera 
Erythroxylaceae... 2.22.22 0 2.02.02 
Descriptions of four species of Erythroxylon...............2.......-.. 
Meliaceae....... 2.222222 022222 cee eee cence eee ee 
A new Spanish cedar from central Mexico..............2......--2---.- 
Polygalaceae.... 2.22.02. 2 22 eee eee eee ee 
A new Polygala..........2...20...2-0-.-00000000 000 c cece eee eee 
Vitaceae. 2.22.2... eee ence ee eee 
A new grape from eastern Mexico. :.............0....0022-2-----2------ 
Tillaceae. 2.2.2.2... eee eee 
Notes on Heliocarpus, with new species...................-.---.-2--- 
Two new basswoods..........-2222-2--.--.--20 00000 eee e eee ee eee eee 
Malvaceae... 0... 0.0.02 2 222 eee eee eee eee 
Three new Abutilons ............2.-0.00.0-0200000000 0000 e eee ee eee eee 
Two new Kosteletzkyas and 
Two species of Robinsonella 
aNCW Name... 2.2... eee 
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