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Vol. 51—1997 - NorthEastern Weed Science Society

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79<br />

Table 2. Dens' and frequencyvaluesfor trees plantedat home sites, New YorkCity,<br />

New York. (1 Trees indigenousto the New York Cityregion.<br />

Species Density Frequency<br />

Comus florida .775 47.5<br />

Quercuspalus . s<br />

I .34 22.5<br />

Tsuga canaden is l .325 12.5<br />

Acerpa .275 22.5<br />

Acer platanoid s .25 17.5<br />

Magnoliasoul geana .25 20.0<br />

Thuja occiden lis .25 10.0<br />

Pyrus malus .25 15.0<br />

Prunus avium .20 17.5<br />

Piceaabies .175 15.0<br />

Taxus spp. .175 7.5<br />

Piceapungens .075 7.5<br />

Prunus serrula .05 2.5<br />

Comus Kousa .05 5.0<br />

Robinia pseud acaciaI .05 5.0<br />

Platanus occid ntalis' .05 5.0<br />

Pinus strobus .025 2.5<br />

Catalpa bigno ioides' .025 2.5<br />

Betulapopulif Hal .025 2.5<br />

Cercis canade sis .025 2.5<br />

Crataegussp. .025 .:.5<br />

Pyruscomm .025 2.5

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