Praefoliation (praefoliatio). The mode in which a foliage-leaf is disposed before its expansion.
Procumbent (procumbens). Spreading along the ground.
Quincuncial (quincuncialis). Imbricate in bud, so that one perianth-leaf is overlapped on one side only, the others on either or neither side.
Raceme (racemus). A centripetal (racemose) inflorescence with an elongated axis and distinctly stalked flowers.
Racemose (racemosus, botryosus). Consisting of a main axis not ending in a number of weaker lateral axes.
Rachis (rhachis). The main axis of an inflorescence or of a compound leaf.
Radiating (radians). Spreading all round; or bearing larger flowers or larger perianth-leaves at the circumference than in the centre.
Radical (radicalis). Arising from the base of the stem, apparently from the root.
Radicle (radicula). The lower part of the embryo (below the cotyledons).
Raphe (raphe). A cord of tissue forming a prolongation of the funicle along the coats of the ovule.