=Lemma.= One of the bracts in the spikelet of a gra.s.s, and described in the treatment of that family.
=Membranous.= Thin or membrane-like in texture.
=Monoecious.= Bearing stamens and pistils in separate flowers, but on the same plant.
=Mucronate.= Tipped with a short small abrupt tip.
=Node.= A joint of a stem, at which leaves are borne and branches appear.
=Oblanceolate.= Reversed lanceolate in shape.
=Oblique.= With unequal sides.
=Oblong.= Somewhat rectangular in shape, with parallel sides.
=Oblong-lanceolate.= Intermediate in shape between oblong and lanceolate.
=Oblong-spatulate.= Intermediate in shape between oblong and spatulate.
=Obovate.= Reversed ovate in shape.
=Obtuse.= Blunt-tipped; terminating in an obtuse angle.
=Odd-pinnate.= A compound leaf terminating in a single leaflet.
=Once-compound.= A compound leaf bearing leaflets at the end or along the sides of the main axis.
=Once-pinnate.= A compound leaf bearing leaflets along the sides of the axis.
=Open sheath.= A leaf-sheath with separate margins.
=Opposite.= Situated in pairs on opposite sides of the stem or axis.
=Ovary.= The basal, usually swollen portion of the pistil, within which the seeds are produced.
=Ovate.= Egg-shape in outline.
=Ovate-lanceolate.= Intermediate in shape between ovate and lanceolate; broadly lanceolate or narrowly ovate.
=Ovate-oblong.= Intermediate in shape between ovate and oblong.
=Ovoid.= Egg-shape.
=Palmate.= With several organs or structures attached at or proceeding from the same point; applied chiefly to the arrangement of princ.i.p.al veins in a leaf and of leaflets in a compound leaf.
=Panicle.= A loose, more or less irregular, branching cl.u.s.ter of pedicelled flowers, usually much longer than thick.
=Parallel-veined.= With the princ.i.p.al veins of the leaf paralleling each other from the base to the apex, or (rarely) from the mid-rib to the margin.
=Pedicel.= The stalk of a single flower.
=Parasite.= A plant which grows attached to another and derives its nourishment from it.
=Peduncle.= The stalk of a flower-cl.u.s.ter, or of a solitary flower.
=Peltate.= Attached to the stalk by the lower surface, instead of the margin.
=Perennial.= Living through several seasons.
=Perfect.= Bearing stamens and pistils in the same flower.
=Perfoliate.= Clasping the stem so completely that the stem seems to pa.s.s through it.
=Perianth.= The calyx and corolla of a flower.
=Perigynium.= A sac-like structure surrounding the achene of a sedge.
=Persistent.= Remaining attached for a considerable time.
=Petal.= One member or segment of the corolla.
=Petiole.= The stalk of a leaf.
=Pinnate.= With several organs or structures attached at the sides of an axis or stalk; applied chiefly to the arrangement of the princ.i.p.al veins in a leaf and of leaflets in a compound leaf.
=Pinnatifid.= Deeply pinnately cut or divided.
=Pistil.= The central portion of a flower, consisting of ovary, style, and stigma; the seed-bearing part of the flower.
=Pistillate.= Bearing pistils.
=Polygamous.= Applied to plants in which some flowers are perfect and others either staminate or pistillate.
=p.u.b.escent.= Hairy.
=Raceme.= A more or less elongated flower-cl.u.s.ter, bearing pedicelled flowers along a single axis.
=Racemose.= Arranged in racemes.
=Receptacle.= The end of a peduncle or pedicel upon which the organs of a flower, or the flowers of a head, are attached.
=Recurved.= Curved back.
=Reflexed.= Abruptly bent back or down.
=Regular.= Uniform in shape or structure. Flowers are generally considered regular when all the petals are of the same size and shape.
=Retrorse.= Directed backward or downward.