More Weeds

by Carl Strang

Time to catch up on the weeds at Mayslake, as many more have begun to bloom. Remember that here I am using a very broad definition for “weed,” that includes the meanings of undesirable plant, plant not native to the area, and plant with a weedy life history strategy . An example of a native plant in the last category is annual bedstraw.

Annual bedstraw b

The rest of today’s species are imports. Two are from Asia, and perhaps it is no coincidence that these two both had specific agricultural uses. One is alfalfa.

Alfalfa b

The only place I have seen alfalfa at Mayslake so far is in a location that once held a dairy farm, and I wonder if this plant’s history traces to that operation. The other Asian weed also very much meets the definition of “undesirable plant.”

Multiflora rose b

Multiflora rose was widely planted as a thorny hedge, decades ago. Too late people realized how uncontainable this shrub is, and I have gotten many a piercing while trying to remove it from places under my protection. The rest of today’s weed list comes from Europe, and most probably were hitchhikers. One exception is red clover.

Red clover b

Another, European highbush cranberry, is planted widely as a landscape shrub.

European highbush cranberry 2b

Crown vetch has been planted in an effort to control erosion and enrich the soil cheaply in highway construction projects.

Crown vetch 1b

Like multiflora rose, it has become a problem plant because it won’t stay put. As far as I know, the remaining European species were incidental rather than intentional imports. These include ox-eye daisy,

Ox-eye daisy b

sulfur cinquefoil,

Sulfur cinquefoil b

bittersweet nightshade,

Bittersweet nightshade b

English plantain,

English plantain b

and yellow sweet clover.

Yellow sweet clover b

So far I have not seen white sweet clover at Mayslake.

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