394 Pub. Puget Sound Biol. Sta. Vol. 2, No. 5^8 



Nuphar reappeared in the old location for about 2 years, the time 

 varying with the dampness of the location. The leaves were not over halt 

 size and the petioles not over 2 inches (5 cm.) long. It is reappearing 

 along the new level. The dense growth of other plants on the old location 

 surely must have been a factor in the disappearance of Nuphar above 

 the water line, although not the only one. Parenthetically it may be 

 remarked that the first year after and 8-foot (2.5-meter) rise in Trout 

 Lake at Friday Harbor, Washington, petioles of Nuphar were observed 

 feet (2.8 m.) long, bearing nearly normal blades. 



Scirpus continued its subterranean shoots and thus grew out to the 

 new water level, when the uncovered shore was not over 75 feet (23 m. ) 

 wide. A more gentle slope usually held enough water for the growth of 

 the plants to continue in the old habitat. Where the water was insufficient 

 the plants high up on shore died in a few years. 



Thus the most delicate plants died at once. Certain perennials witli 

 greater ability to withstand dryness, or with more stored food as possible 

 factors, persisted for a year or more. One was washed away. One with 

 a very large rhizome grew for more than one year. One extended its 

 rhizomes into the new habitat. All left the old habitat or were crowded 

 out, within three years, unless the location was such that springs, stream- 

 lets or almost level muck kept the soil soggy. 



The constantly damp regions of gentle slope and much decomposing 

 vegetation were the most completely revegetated the first year. These 

 are the only ones which will be considered here concerning the new plant 

 covering, whose most abundant species are given below. The first ii> 

 abundance is Typha. It is marked 100 in the scale so that other plants 

 may be numerically compared with it in this respect. 



Typha latifolia (cat tail) 100 



Bidens cernua (Spanish needle) . 90 



Scirpus occidentalis (tule) . 70 



Juncus hufonius (toad rush) 50 



30 

 25 

 20 

 12 



Eleocharis ohtusa (spike rush) 



Sparganium androcladium (bur reed)__ — 



Oennnthe sarmentosa (water celery) 



Epilobium paniculatum (fire weed) 



Polygonum hydropiperoides (water pepper) 10 



In Union Bay the water receded for more than a quarter of a mile 

 (about 400 m.). How did the seed get there so abundantly? 



Typha and Epilobium are distributed by wind, so their reaching the 

 area in abundance is not surprising. One autumn a strong wind from this 



