Rufous, Rufescent, brownish-red or reddish-brown.
Rugose, wrinkled; roughened with wrinkles.
Ruminated (albumen), penetrated with irregular channels or portions, as a nutmeg, looking as if chewed.
Runcinate, coarsely saw-toothed or cut, the pointed teeth turned towards the base of the leaf, as the leaf of a Dandelion.
Runner, a slender and prostrate branch, rooting at the end, or at the joints, [40].
Sabulose, growing in sand.
Sac, any closed membrane, or a deep purse-shaped cavity.
Saccate, sac-shaped.
Sagittate, arrowhead-shaped, [53].
Salsuginous, growing in brackish soil.