This section is from the book "Harper's Guide To Wild Flowers", by Caroline A. Creevey. Also available from Amazon: Harper's Guide To Wild Flowers.
This species branches more freely than the last, and turns bright red in fall. Of the three flowers formed at the joints, the middle one is much higher than the others. Salt marshes along the coast.
S. ambigua bears greenish flowers in clusters of threes, in a short spike, springing from broadly ovate scales, the three flowers being nearly equal in height. This is a perennial.
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