Table 5. Vegetation found in bulrush potholes. 

Occurrence Average Average 
Species (Percent of percentage of density 
potholes) vegetation zone 


Scirpus acutus . 100 31 II 
Hordeum jubatum 100 26 Ir 
Fluminea festucacea | 100 | 23 II 
Eleocharis spp. - Juncus spp. 100 16 II 
Typha latifolia 100 16 II 
Myriophyllum spp. 75 27 Ie II 
Potamogeton spp. 75 20 IT 
Green algae 75 36 II 
Utricularia vulgaris 50 11 I 
Scirpus validus 50 8 I 
Phragmites communis _ 50 3 I 
Carex spp. 50 2 I 
Lemna trisulca 25 
Lemna minor 25 
Scirpus paludosus 25 
Typha angustifolia 25 
A dense stand of alkali bulrush (Se udosus) erew as a pure stand 
on one shore of pothole No. . This area also supported good stands of 
hardstem bulrush and some cattail. Again the surface was choked with water 
milfoil. One pothole had an abundance of water parsnip (Sium suave) yet 
contained a clump of whitetop as well as softstem bulrush, hardstem bulrush, 
ani cattail, ami was surrounded by only a narrow border of spikerush. Water 
milfoil covered the surface of this area by late summer, 
Pothole No. 25 at first glance appeared to be unrelated to any others on 
the area since it supported little emergent vegetation. It was subjected to 
extrenely heavy grazing pressure and was apparently similar to others of this 
type but had been completely grazed out early in the summer. The vegetation 
consisted mainly of grazed stens of softstem and hardstem bulrush, burreed 
(Ss anium spp.), and water plantain (Alisma plantago-aquatica)« These stens 
were overtopped in late summer by spikerush and sm clumps of slough grass. 
