Achene.A small, dry, hard, seed-like fruit containing a single seed.Acuminate.Taper-pointed.Acute.Ending with an acute angle.Alternate.Located singly on the stem, with other leaves above or below.Annual.Living but a single season.Anther.The (usually) enlarged end of a stamen, bearing the pollen.Ascending.Rising or curving obliquely upward.Auricle.An ear-shape appendage at the base of a leaf or other organ.Auricled, auriculate.Furnished with auricles.Awl-shape.Tapering to a slender stiff point.Awn.An awl-shape or bristle-shape appendage.Axil.The point on a stem just above the base of a leaf or branch.Axillary.Arising from or produced in the axil.Basal.Arising from or produced at the base.Beak.Ending in a prominent slender point.Bract.A small leaf near the base of a flower or flower-stalk, or in a flower-cluster.Bracteal.An adjective derived from bract.Bipinnate.A leaf with a pinnately branched axis, bearing leaflets on the sides of the branches.Calyx.The outer portion of the flower, usually green in color. In some plants it is colored to resemble (or replace) the corolla, and in others may be minute or wanting.Capitate.Shaped like a head; or arranged in a dense compact cluster.Capsule.A dry fruit with usually several seeds, opening at maturity.Catkin.A cylindrical or ovoid cluster of inconspicuous flowers, for example, the "pussy willow."Cells of ovary.The cavity or cavities within an ovary, in which the seeds are produced.Ciliate.Provided with hairs at the margin.Clasping.With the base of a leaf or other organ wholly or partly surrounding the stem.Cleft.Deeply divided toward the base or the mid-rib.Closed sheath.A leaf-sheath in which the margins are united to form a tube.Composite.A flower-cluster containing several or many small flowers, closely crowded together and provided with calyx-like bracts, so that the whole cluster resembles a single flower.Compound.Composed of 2 or more similar parts united, as a compound ovary.Compound leaf.A leaf with two or more separate leaflets on a single petiole.Connate.Grown together.Cordate.Heart-shape. A whole leaf-blade may be cordate, or the term may be applied to the base of a leaf only.Cordate-sagittate.Intermediate in shape between cordate and sagittate.Corm.An enlarged stem-base, of solid structure and usually underground.Corolla.The portion of a flower next to the calyx (in ordinary cases). It is generally the most conspicuous part of the flower, but may be completely absent, or inconspicuous, or replaced by the calyx.Corymb.A flat-topped or convex-topped flower-cluster.Creeping.With stems prostrate on the ground and rooting at intervals.Crenate.With round-pointed teeth at the margin.Crenulate.Finely or minutely crenate.Cuspidate.Ending with a short sharp stiff point.Deciduous.Not persistent for a long time; not evergreen.Decompound.Repeatedly branched with numerous leaflets.Decurrent.Extending with wing-like expansions down the stem.Decumbent.A stem prostrate at the base, but with the tip more or less ascending.Dehiscent.Breaking open at maturity to discharge the contents.Deltoid.Broadly triangular.Dioecious.Bearing staminate and pistillate flowers upon separate plants.Dissected.Finely divided into numerous small or narrow segments.Divided.With deep segments or lobes.Elliptical.Having the shape of an ellipse.Elliptical-lanceolate.Intermediate in shape between elliptical and lanceolate.Entire.With an unbroken margin, without teeth or lobes.Epiphyte.A plant growing attached to the bark of another plant, and without connection with the soil.Erect.Growing in nearly or quite a vertical position.Evenly pinnate.A compound leaf terminating in a pair of leaflets.Filament.The (usually) slender basal portion of a stamen, supporting the anther at its tip.Floweret.A small flower.Gamopetalous.Composed of united petals.Gamosepalous.Composed of united sepals.Glabrous.Smooth; without hairs.Glandular.Bearing glands.Glaucous.Covered with a thin bluish or whitish deposit, easily rubbed off.Glume.A bract at the base of a spikelet of a grass.Half recurved.Curved half-way backward.Hastate.Shaped like an arrow-head, but with the basal lobes pointing outwards instead of backward.Head.A dense cluster of flowers, about as broad as long.Hirsute.With stiff coarse hairs.Imperfect.Flowers which contain either pistil or stamens, not both.Incised.With deep, sharp, irregular, divisions.Indehiscent.Not breaking open at maturity to discharge the contents.Inflorescence.A cluster of flowers.Internode.A section of stem between two joints, or nodes.Involucre.A collection of bracts at the base of a flower-cluster.Irregular.Possessing similar parts of different size or form. An irregular flower is generally distinguished by petals of unequal size or shape.Laciniate.Cut into narrow pointed lobes or divisions.Lanceolate.Shaped like a lance-head, several times longer than wide,and broadest below the middle.Linear.Long and narrow, but with about uniform width.Linear-lanceolate.Intermediate in shape between linear and lanceolate;narrowly lanceolate.Lip.The largest and most conspicuous petal in an irregular corolla,usually applied to the lower petal of an orchid.Lobe.A segment or division of any organ.Leaflet.One portion of the blade of a compound leaf.Lemma.One of the bracts in the spikelet of a grass, 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 principal veins in a leaf and of leaflets in a compound leaf.Panicle.A loose, more or less irregular, branching cluster of pedicelled flowers, usually much longer than thick.Parallel-veined.With the principal 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-cluster, 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 pass 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 principal 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.Pubescent.Hairy.Raceme.A more or less elongated flower-cluster, 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.Revolute.Rolled backward or under.Rootstock.A horizontal subterranean stem, sending up leaves or stems.Rotate.Wheel-shape; essentially flat and circular.Sac-like.Inflated; sack-like.Sagittate.Shaped like an arrow-head.Salver-form.A corolla having a slender tube abruptly expanded at the summit into a flat or spreading portion.Scape.A peduncle arising directly from the base of the plant, leafless or bearing bracts only.Segment.One member or portion of an organ.Sepal.One member or portion of the calyx.Serrate.With sharp teeth at the margin.Serrulate.Finely or minutely serrate.Sessile.Without a stalk, petiole, or pedicel.Sheathing.Inclosing.Simple.In one piece; not compound; usually applied to leaves with a single blade.Sinuate.Wavy-margined.Sinus.The angle between two lobes or divisions.Spadix.A short fleshy spike.Spathe.A large bract or pair of bracts enclosing a flower-cluster.Spatulate.Shaped like a spatula, with a narrow base and an enlarged, more or less rounded summit.Spike.An elongated flower-cluster having sessile flowers upon an unbranched axis.Spike-like.Resembling a spike.Spinulose-serrate.Provided with teeth tipped with minute spines.Spur.A hollow projection from the calyx or corolla, usually slender in shape, and generally directed backward.Stamen.One of the organs of a flower, consisting of a filament and anther.Staminate.Bearing stamens.Stolon.A short stem arising from the base of a plant, prostrate or nearly so, and eventually taking root.Striate.Marked with fine stripes or ridges.Style.A portion of the pistil, usually slender, and connecting the ovary and stigma.Superior.A superior ovary occupies the center of the flower and is not attached to any other floral organs.Subtending.Situated at the base of an organ.Subulate.Awl-shape.Ternately.Divided by threes.Tomentose.Densely hairy with matted or tangled hairs.Trifoliate.With three leaflets.Truncate.Cut straight across at the tip, or nearly so.Tube.The more or less cylindrical portion of a gamosepalous calyx or a gamopetalous corolla, distinguished from the expanded or lobed terminal portion.Tubular.Shaped like a tube.Twice-pinnate.Same as bipinnate.Two-lipped.A calyx or corolla in which the upper half is decidedly different in size or shape from the lower.Umbel.A flower-cluster with several or many pedicelled flowers all arising from the same point.Undulate.With a wavy margin.Viscid.Sticky.Villous.With long soft hairs.Whorl.An arrangement of 3 or more leaves or flowers in a circle around a node.Whorled.In a whorl.Wing.A thin flat expansion on the sides or edge of an organ.