Pyriform. Pear-shaped.
Raceme. An inflorescence consisting of a central rachis bearing a number of flowers with stalks of nearly equal length.
Rachis. The axis of a compound leaf or inflorescence.
Receptacle. The portion of the floral axis upon which the flowers are borne.
Reticulate. Forming a network.
Rhombic. Somewhat diamond-shaped.
Rib. A prominent vein.
Samara. An indehiscent winged fruit.
Scurfy. Covered with small scales.
Seed. A ripened ovule.