CONTENTS. 
PAGE. 
LTRUTROVOLENO YOO sy epee neat AACA ENS 2k face StAhe irShar hie IRA Aut SOUS ae ee ib7/ 
Mandmanrkstotedevelopmentinns « we ac aicseiclscel> ojsloneioll Wcttiia viclstlhle ences. 18 
A general view of classification, growth forms and plant associations. ..... 21 
1. As to the content of the plant kingdom and the relation of groups to 
SHUG IY OLN OVE oar ceye ea tskar HERA 6 aren el conics Giga Sar TET arta HIG Ce nea 22 
2. As to growth forms or the working units of vegetation and how they 
TROLS ese renee cdletels ocean cits cA ZN me canst Ae Psy CoRR nl See Tt 23 
SEAS HTOMU Ne MAcUne Of vies etatilonerws sanmieh tes cree uennei oA choke Nene cee 25 
4. As to the static character and nutrition relations of the green plant — 
especially of the cormophytic plant.......2..2..:..1.:..2..... 26 
Landmarks in the geological history of vegetation..................... 29 
The plant life of the coal period. The age of ferns and their allies. .... 29 
The ege of gymnosperms. Allies and ancestral forms of pines etc...... 31 
Plant life of the later cretaceous period. Introduction of modern types 
ofsbroad leaved> dicotyledonous ‘trees:-.20.0-. 55...) sosn esas. 32 
Plant life of the tertiary periods. The age of elaboration or differentiation 
of modern elements and aspects of vegetation in response to differen- 
TIAUIN PMENVITONIMNENE sons ate eedeeeo.lekee ons one eee MAS eee 34 
Climatic differentiation and segregation of floral provinces............ 35 
Differentiation of land surface and of vegetation aspects.............. 35 
Angiosperms and the significance of flower structures................ 36 
Intensified relationship between animals and plants.................. 37 
The glacial period and its effect upon vegetation....................... 39 
Modern aspect of the plant geography of New York.................... 40 
ASHecistOlethe environmentiar..t.0 vont act eens es ee 40 
ihe rcententrof the New York stateiflora. a..q00.5.6 245-500 esos noo 43 
(Ceneralsoutline olclassiticationee eer: ee eh nein heen nore 45 
Zonalerelationsiolthe News Mork Oraese teenie ne ee aes eee 47 
Effect of elevation on zonal relations as shown by transects of the State 54 
Transect from the Lower Hudson to Rouse’s Point................ 54 
iMransecturomlstatenelslandetoyOSweconaaee nse aae oe ae 55 
itransect, of; the: -Adirondacksa.men ae eee ate aioe ae eee 57 
Effects of plateau dissection on zonal relations....................... 59 
Influence of lakes upon zonal relations in New York. Does the native 
vegetation reflect this moderating influence of lakes?................ 63 
Apparent effect of glacial filling on zonal relations through the creation 
OMMOR NAb tate: sie lve Aik. oes i aeybeesen de? AT CED eee eS, a aN 64 
