. The ecological relations of roots . A. Psoralea tenuiflora, the tap-root decayed. B. Psoralea argophylla, showing entue root in center. WEAVER PLATE 1. A. pallida. B. Lygodesmia juncea, iniv^o seQiioris. C. Lespedeza capitata. WEAVER PLATE 12

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Keywords: ., bookcentury1900, bookdecade1910, bookidecologicalre, bookyear1919