8) THE SALT MARSH PLANTS OF NORTHERN KANSAS 257 
Seconp zone: A narrow strip a few yards wide composed of 
Distichlis maritima Raf., Polygonum ramosissimum Michx., and 
Sueda diffusa Watson. The Polygonum grows vigorously and 
_ loms the characteristic plant. This zone seems to be just above 
the outer limit of the ordinary inundations of the salt brine. 
: Dstichlis was abundant, but Suzeda was only thinly interspersed, 
td there were many dead and dry specimens. 
_ TuirpD zonE: This is a wide dry zone, with the following 
plants : Distichlis maritima Raf., characteristic and rather stunted 
: inits growth ; Polygonum ramosissimum Michx., quite rare, prob- 
} aly because of dryness; Sweda diffusa Watson, interspersed, 
ftecommon ; /va ciliata Willd., rare. 
FourtH Zone : Usually about as wide as the last, and with 
the following plants: Daéstichlis maritima Raf., characteristic; 
— sonumn ramosissimum Michx., not very common ; Sueda aif- 
fea Watson, occasional ; Jva ciliata Willd., not very common, 
Sporobolus heterolepis Gray, characteristic; S. Zexanus Vasey, 
: *undant in some places; Atriplex expansa Watson, rare; Aster 
4 miltiflorus Ait, occasional. 
prc ZONE: A rather-wide zone in which plants less char- 
7 _. halophyte regions are trying to gain a foothold. 
’ low; Willd. is the prominent plant of this zone. The fol- 
Bl Plants were collected: Distichlis maritima Raf., abundant; 
oy ramosissimum Michx., not common; {va ciliata Willd., 
dT eristic ; Sporobolus heterolepis Gray, common; Sporobolus 
4 in some places; Ariplex expansa Watson, occa 
 Ommon - H, ultiflorus Ait., occasional; Scirpus pungens Vahl., 
- Sometime ‘ordeum jubatum L., occasional ; Panicum virgatum L.. 
les, , m patches; Gaura parviflora Dougl., occasional ; 
. = P0Stachya DC. tare. 
a. gal The outer margin of the salt marsh propets 
th cone Sted by a rise in the ground. Much like the 
AM gives ae that here Ambrosia psilostachya DC. is abundant, 
| ing plant. € character instead of Jva ciliata Willd. The follow- 
- * Were collected: Distichlis maritima Raf., Polygonum 
