Table B-7. Low dune grass community data for the third sampling 
period (12 September 1981).1 
Relative Grams per 
Frequency frequency square 
Species (percent) (percent) meter 
Triplasts 
purpurea 52155 
Ertgeron 
eanadensts 
var. pustllus 28.0 
Ammopht La 
brevtltgulata 65.8 
Diodia teres 1.5 
Cenehrus 
trtbulotdes 0.58 
Eragrostis 
elltottit 0.06 
Euphorbta 
polugontfolta 0.19 
Total 
lBased on forty 0.2-meter x 0.2-meter quadrats. 
Table B-8. Low dune grass community data for the fourth sampling 
period (6 November 1981).! 
Total 
weight 
(grams ) 
Relative 
frequency 
(percent) 
Grams per 
square 
meter 
Frequency 
(percent) 
Ammophila 
breviligulata 108.8 
Triplasis 
purpurea 32.6 
Erigeron 
canadensis 
var. pusillus 20.2 
Europhorbia 
polygonifolia 0.16 
Cenchrus 
tribuloides 0.42 
Diodia teres 0.04 
Eragrostis 
elliottii 0.05 
Total 
lBased on forty 0.2-meter x 0.2-meter quadrats. 
43 
