also called Ruellia simplex or Ruellia brittoniana, are perennials—true petunias are usually grown as annuals. The plucky plants have vibrant lavender blooms, green leaves, and stems that can ...
Journal of the Washington Academy of Sciences, Vol. 17, No. 20 (December 4, 1927), pp. 509-520 (12 pages) This item is openly available as part of an Open JSTOR ...
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