Produced, extended or projecting; the upper sepal of a Larkspur is produced above into a spur, [87].
Proliferous (literally, bearing offspring), where a new branch rises from an older one, or one head or cluster of flowers out of another.
Propaculum or Propagulum, a shoot for propagation.
Prosenchyma, a tissue of wood-cells.
Prostrate, lying flat on the ground, [39].
Protandrous or Proterandrous, the anthers first maturing, [116].
Proteranthous, flowering before leafing.
Proterogynous or Protogynous, the stigmas first to mature, [116].
Prothallium or Prothallus, [160].
Protoplasm, the soft nitrogenous lining or contents, or living part, of cells, [129].