To determine the relative importance of variation in several plant characters on susceptibility to herbivores, we examined patterns of seed predation by two monophagous insect species and patterns of ...

1. The upper seeds of Xanthium show constantly less catalase activity per unit of dry substance than the lower seeds. 2. Catalase activity is relatively stable in dry stored seeds, for several months.

China: seeds ground into flour and baked into cakes. Young leafy shoots thoroughly boiled and washed to remove bitter element, possibly tannin, as the plant is an active styptic. Manchuria: leaves ...

EFFORTS to induce flowering in the short-day plant Xanthium pensylvanicum under long-day conditions have consistently failed up to now. From numerous reports it has been concluded that for flower ...

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