Pyrene, Pyrena, a seed-like nutlet or stone of a small drupe.
Pyriform, pear-shaped.
Pyxidate, furnished with a lid.
Pyxis, Pyxidium, a pod opening round horizontally by a lid, [124].
Quadri-, in words of Latin origin, four; as Quadrangular, four-angled; Quadrifoliate, four-leaved; Quadrifid, four-cleft. Quaternate in fours.
Quinate, in fives. Quinque, five.
Quincuncial, in a quincunx; when the parts in æstivation are five, two of them outside, two inside, and one half out and half in.
Quintuple, five-fold.
Race, a marked variety which may be perpetuated from seed, [176].
Raceme, a flower-cluster, with one-flowered pedicels arranged along the sides of a general peduncle, [73].