CONTENTS 
PAGE 
aHECI TIC HLOM empresa ksi fh ek te ye Sk le | SERN NE ae oe: 5 
The development of vegetation on peat beds..................-e eee eeeeee 9 
SOMC ENARCHRUIVCIADOR y= tik Morse a ttetoc tee A see) se Dee Eee ee 12 
The peat beds of the Grasse River sand plain...............0.02.c0e scenes 16 
iMhesplant associations: of the peat beds:......-....0...9.22 7.294. oh a. 19 
ihe sphaenum-sedreassociation= . ~~ F225 8 ob. ts Sete es eke 19 
@he sphagnum-heath shrub association. ..:.....2....2.0--.-+-.6--- 20 
Method oindevelopment....22r.s.- ccles chee ee cere ee ee arene 21 
iheibopashrulbrspecies Soya.) os Maas ion «fies ee ee 22 
Growth and vegetative propagation.....................0.45e00- 23 
The black spruce-tamarack association — Bog Forest................ 23 
Stages in the invasion of the sphagnum-shrub association by bog 
COMMLET Samar ieee tee conse 0 JET A ORT IVA se ee ere area 23 
The closed stand of young black spruce-tamarack forest........... 26 
The closed stand of older black spruce-tamarack forest............ 27 
Transition stage from bog-conifer to balsam swamp forest.......... 28 
Review of vegetation development on the Grasse River peat beds........... 29 
Vegetation of the non peat covered sand plain..................-..-.--+-- 31 
Wharacterishicispecies eet teeter tls oe cee ee le Late ae ne ee a 32 
The vegetation of the flood plain. Beaver meadow....................... 34 
spe pmaArS limes OWs street: eae tas CM Lr meets en leile SS atee ce Serres uP? Aa 35 
Milter dersthicketa tesa eat Acts pce ee See See ae tee Ere a ere 36 
Eimiennce or Spiasnim. 224.2 094 SMe a OS oe TPO EE, eee 37 
Competition between sphagnum and vascular bog species................-. 40 
Weretsiivesproparation inthe bOgs.....).2.20hce, sess beeen ee anas See 40 
Comparison of Grasse River sand plain with other sand plains of New York.. 42 
"SVE RUSTYE TEN | cal ches bas tai AS A eke ar a AE Shh PR 44 
REITER CERES TA tf MUmrtL AM enr. meee ce TL eo aa Se Sane hea 47 
