TABLE OF CONTENTS. 
PRERACD ocisssia savasntniseactpe nas maadalscnli de pea ebeaaeeemnee rk ea aine xi 
INTRODUCTION sewisee gauss urgevedss dackwadeeretasues. — Ghaceea ase 1 
The work of a botanical survey........... 0.0... ce eee ee cece 1 
Importance of studying a natural area ............ ccc. cee ee 2 
The Minnesota valley as a natural area..................0005- 3 
History of botanical investigation in the Minnesota valley... 4 
Bibliographical list of publications relating to the plants of 
MINNES O08 6: eeiisiciie ns srs Seibsanslee Rees Fash ead HaeBSeeee dae? 5 
Care and identification of material... ... .................05. 9 
Citation of herbarium specimens.. ........ 2.2.2... cee eeeee 9 
Determination of ranges outside of Minnesota ............... 10 
Citation of generic and family ranges. .....................06- 10 
Citation of authors of genera and species..................... ll 
Synonymy and orthography..... iE Snel ah teeta. cm onfeon sd (ate deeeaanthenar ese 13 
Citation of genera and families’..........0..... 0... cece eae 1b 
Generic synonymy and limitation ...... sv evenaeus epee wee sees 16 
Arrangement of families and genera............... cee. ease 18 
Natural divisions of the vegetable kingdom.................. 18 
Characters of the Metaspermae............. 2... cee eee 22 
Characters of the Archispermae ................0-00eec cee e eee 23 
The: Proditetion Of “SeCAS” sic exc awe caxtews tai eee aaaamnnes 24 
The classification of Engler and Prantl ...................... 24 
Subdivisions of the Metaspermae...................0ceeeeeeee 27 
Literature bearing upon metaspermic polymorphism......... 29 
Statistical discussions <<+.s ss sesecssecscosswa eves ee eedea@yeeunsd 30 
List OF HIGHER SEED-PRODUCING PLANTS (METASPERMAE) NA- 
TIVE TO THE VALLEY OF THE MINNESOTA.............. 31 
MONCCOLLED ONES oe 2.5.5 crnistciwanaibd Sapam Was REAR Beiiead a aaxeoage 31 
TU, DY pHACEAe: «cai chet eens amma yes Shoe a een 31 
EL, (‘SPar@aniaCea isin os ssceeecn cages Aved eu sxaaennelees 32 
TIL. Potamogetonaceae............... ccc cece e eens 33 
DVic. Najadacéae enisec ees csc 5 maeean ie vs See bs rowan ek 40 
Vi JUNCag INCA wsesssde soe ees eee e wide pe EE Seed aes 41 
WEES AMISTIACC AG x to irate isis Bae atinaen sedi odie steed ous 42 
WII. Hydrocharitaceae ............... 0. cee ee ee eee ee 45 
WITT. (Gramiinedescccccaconck aidan carcnedneuie es nee aeuetens 47 
EX6 “CV PeTaCeae ssnta. sss Peis esto 8 Sead ctnase des 89 
My -ALOldeae wc inccveaedce sty 268 iwawieees axes cyte i eal 130 
KT, DLemnaceses ess ceases ye see cnaieeeda ie inv nietennces 132 
MEML.. “Myriddcede: 2. c6.c0dei co tews nd widened ie ammnascess 135 
LED.) HridcCautlaceae:ccecccecdwecasenehans cca aeadob ease 135 
