Glossary p.2 Ovary inferior - the ovule bearing part of the flower found below the calyx leaves. Ovary superior - the ovule bearing part of the flower found above the calyx leaves. Palea - in the grass spikelet, the upper of the two enclosing bracts, the lower one being the lemma. Perianth - a collective term for the calyx and corolla. Phyllotaxy - the arrangement of leaves on an axis, expressed by a fraction, the numerator representing the number of revolutions of a spiral made in passing from one leaf past each successive leaf to reach the leaf directly above the initial leaf, and the denominator representing the number of leaves passed in the spiral thus made. Rachilla - axis bearing florets (gromineae). Rays (ray floret) - the straplike extension of the corolla of florets (compositae). Spikelet - one part of a compound inflorescence the floral unit of fam. gromineae composed of flowers and subtending bracts. Stipulate - with stipules. Stipule - an appendage at the base of the petiole (leaf stalk). Unisexual - having one sex present and functional in the one flower. Sorus - the heap or cluster of fruiting bodies found on the dorsal side of fern frond. Zygomorphic - corollas when divisible into equal halves in one plane only.